Datasets:
TheFinAI
/
FinCL-eval

Dataset card Data Studio Files
xet
 Community
1
context
stringlengths
21
24.6k
category
stringclasses
2 values
entity
stringlengths
1
12
entity_type
stringclasses
5 values
query
stringlengths
97
3.31k
answer
stringlengths
12
168
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
4.5
monetaryItemType
table: <entity> 4.5 </entity> <entity type> monetaryItemType </entity type> <context> Fuel Adjustment Clause (b) Fuel Adjustment Clause (b) | 4.5 | 5.0 </context>
us-gaap:RegulatoryAssetsNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
5.0
monetaryItemType
table: <entity> 5.0 </entity> <entity type> monetaryItemType </entity type> <context> Fuel Adjustment Clause (b) Fuel Adjustment Clause (b) | 4.5 | 5.0 </context>
us-gaap:RegulatoryAssetsNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
3.7
monetaryItemType
table: <entity> 3.7 </entity> <entity type> monetaryItemType </entity type> <context> PPACA Income Tax Deferral | 3.7 | 3.9 </context>
us-gaap:RegulatoryAssetsNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
3.9
monetaryItemType
table: <entity> 3.9 </entity> <entity type> monetaryItemType </entity type> <context> PPACA Income Tax Deferral | 3.7 | 3.9 </context>
us-gaap:RegulatoryAssetsNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
2.9
monetaryItemType
table: <entity> 2.9 </entity> <entity type> monetaryItemType </entity type> <context> Other | 2.9 | 4.2 </context>
us-gaap:RegulatoryAssetsNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
4.2
monetaryItemType
table: <entity> 4.2 </entity> <entity type> monetaryItemType </entity type> <context> Other | 2.9 | 4.2 </context>
us-gaap:RegulatoryAssetsNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
371.7
monetaryItemType
table: <entity> 371.7 </entity> <entity type> monetaryItemType </entity type> <context> Total Non-Current Regulatory Assets | $ 371.7 | $ 425.4 </context>
us-gaap:RegulatoryAssetsNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
425.4
monetaryItemType
table: <entity> 425.4 </entity> <entity type> monetaryItemType </entity type> <context> Total Non-Current Regulatory Assets | $ 371.7 | $ 425.4 </context>
us-gaap:RegulatoryAssetsNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
23.0
monetaryItemType
table: <entity> 23.0 </entity> <entity type> monetaryItemType </entity type> <context> Provision for Interim Rate Refund | $ 23.0 | — </context>
us-gaap:RegulatoryLiabilityCurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
—
monetaryItemType
table: <entity> — </entity> <entity type> monetaryItemType </entity type> <context> Fuel Adjustment Clause (b) Fuel Adjustment Clause (b) | — | $ 8.7 </context>
us-gaap:RegulatoryLiabilityCurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
7.2
monetaryItemType
table: <entity> 7.2 </entity> <entity type> monetaryItemType </entity type> <context> Fuel Adjustment Clause (b) Fuel Adjustment Clause (b) | 7.2 | — </context>
us-gaap:RegulatoryLiabilityCurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
1.3
monetaryItemType
table: <entity> 1.3 </entity> <entity type> monetaryItemType </entity type> <context> Other | 1.3 | $ 3.9 </context>
us-gaap:RegulatoryLiabilityCurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
3.9
monetaryItemType
table: <entity> 3.9 </entity> <entity type> monetaryItemType </entity type> <context> PPACA Income Tax Deferral | 3.7 | 3.9 </context>
us-gaap:RegulatoryLiabilityCurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
31.5
monetaryItemType
table: <entity> 31.5 </entity> <entity type> monetaryItemType </entity type> <context> Total Current Regulatory Liabilities | $ 31.5 | $ 3.9 </context>
us-gaap:RegulatoryLiabilityCurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
292.7
monetaryItemType
table: <entity> 292.7 </entity> <entity type> monetaryItemType </entity type> <context> Income Taxes (d) Income Taxes (d) | $ 292.7 | $ 310.0 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
310.0
monetaryItemType
table: <entity> 310.0 </entity> <entity type> monetaryItemType </entity type> <context> Income Taxes (d) Income Taxes (d) | $ 292.7 | $ 310.0 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
77.6
monetaryItemType
table: <entity> 77.6 </entity> <entity type> monetaryItemType </entity type> <context> Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j) | 77.6 | 78.0 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
78.0
monetaryItemType
table: <entity> 78.0 </entity> <entity type> monetaryItemType </entity type> <context> Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j) | 77.6 | 78.0 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
74.2
monetaryItemType
table: <entity> 74.2 </entity> <entity type> monetaryItemType </entity type> <context> Plant Removal Obligations (k) Plant Removal Obligations (k) | 74.2 | 67.0 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
67.0
monetaryItemType
table: <entity> 67.0 </entity> <entity type> monetaryItemType </entity type> <context> Plant Removal Obligations (k) Plant Removal Obligations (k) | 74.2 | 67.0 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
40.7
monetaryItemType
table: <entity> 40.7 </entity> <entity type> monetaryItemType </entity type> <context> Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c) | 40.7 | 48.6 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
48.6
monetaryItemType
table: <entity> 48.6 </entity> <entity type> monetaryItemType </entity type> <context> Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c) | 40.7 | 48.6 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
59.7
monetaryItemType
table: <entity> 59.7 </entity> <entity type> monetaryItemType </entity type> <context> Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l) | 59.7 | 30.2 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
30.2
monetaryItemType
table: <entity> 30.2 </entity> <entity type> monetaryItemType </entity type> <context> Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l) | 59.7 | 30.2 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
17.8
monetaryItemType
table: <entity> 17.8 </entity> <entity type> monetaryItemType </entity type> <context> Investment Tax Credits (m) Investment Tax Credits (m) | 17.8 | 13.6 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
13.6
monetaryItemType
table: <entity> 13.6 </entity> <entity type> monetaryItemType </entity type> <context> Investment Tax Credits (m) Investment Tax Credits (m) | 17.8 | 13.6 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
6.7
monetaryItemType
table: <entity> 6.7 </entity> <entity type> monetaryItemType </entity type> <context> Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n) | 6.7 | 6.7 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
0.6
monetaryItemType
table: <entity> 0.6 </entity> <entity type> monetaryItemType </entity type> <context> Other | $ 1.6 | 0.6 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
15.5
monetaryItemType
table: <entity> 15.5 </entity> <entity type> monetaryItemType </entity type> <context> Fuel Adjustment Clause (b) Fuel Adjustment Clause (b) | 0.6 | 15.5 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
0.5
monetaryItemType
table: <entity> 0.5 </entity> <entity type> monetaryItemType </entity type> <context> Other | 0.5 | 4.4 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
4.4
monetaryItemType
table: <entity> 4.4 </entity> <entity type> monetaryItemType </entity type> <context> Other | 0.5 | 4.4 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
570.5
monetaryItemType
table: <entity> 570.5 </entity> <entity type> monetaryItemType </entity type> <context> Total Non-Current Regulatory Liabilities | $ 570.5 | $ 574.0 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Regulatory Assets and Liabilities</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Regulatory Assets (a) Current Regulatory Assets (a)</td><td></td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>—</td><td></td><td>$ 8.7</td><td></td></tr><tr><td>Other</td><td>$ 1.6</td><td></td><td>0.6</td><td></td></tr><tr><td>Total Current Regulatory Assets</td><td>$ 1.6</td><td></td><td>$ 9.3</td><td></td></tr><tr><td>Non-Current Regulatory Assets</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>$ 200.3</td><td></td><td>$ 218.6</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>84.9</td><td></td><td>88.1</td><td></td></tr><tr><td>Asset Retirement Obligations (e) Asset Retirement Obligations (e)</td><td>41.0</td><td></td><td>37.7</td><td></td></tr><tr><td>Taconite Harbor (g) Taconite Harbor (g)</td><td>17.3</td><td></td><td>20.9</td><td></td></tr><tr><td>Manufactured Gas Plant (h) Manufactured Gas Plant (h)</td><td>11.6</td><td></td><td>13.2</td><td></td></tr><tr><td>Cost Recovery Riders (f) Cost Recovery Riders (f)</td><td>5.5</td><td></td><td>33.8</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>4.5</td><td></td><td>5.0</td><td></td></tr><tr><td>PPACA Income Tax Deferral</td><td>3.7</td><td></td><td>3.9</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>2.9</td><td></td><td>4.2</td><td></td></tr><tr><td>Total Non-Current Regulatory Assets</td><td>$ 371.7</td><td></td><td>$ 425.4</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Current Regulatory Liabilities (i) Current Regulatory Liabilities (i)</td><td></td><td></td></tr><tr><td>Provision for Interim Rate Refund</td><td>$ 23.0</td><td></td><td>—</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>7.2</td><td></td><td>—</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>1.3</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Total Current Regulatory Liabilities</td><td>$ 31.5</td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Non-Current Regulatory Liabilities</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Income Taxes (d) Income Taxes (d)</td><td>$ 292.7</td><td></td><td>$ 310.0</td><td></td></tr><tr><td>Wholesale and Retail Contra AFUDC (j) Wholesale and Retail Contra AFUDC (j)</td><td>77.6</td><td></td><td>78.0</td><td></td></tr><tr><td>Plant Removal Obligations (k) Plant Removal Obligations (k)</td><td>74.2</td><td></td><td>67.0</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Defined Benefit Pension and Other Postretirement Benefit Plans (c) Defined Benefit Pension and Other Postretirement Benefit Plans (c)</td><td>40.7</td><td></td><td>48.6</td><td></td></tr><tr><td>Non-Jurisdictional Land Sales (l) Non-Jurisdictional Land Sales (l)</td><td>59.7</td><td></td><td>30.2</td><td></td></tr><tr><td>Investment Tax Credits (m) Investment Tax Credits (m)</td><td>17.8</td><td></td><td>13.6</td><td></td></tr><tr><td>Boswell Units 1 and 2 Net Plant and Equipment (n) Boswell Units 1 and 2 Net Plant and Equipment (n)</td><td>6.7</td><td></td><td>6.7</td><td></td></tr><tr><td>Fuel Adjustment Clause (b) Fuel Adjustment Clause (b)</td><td>0.6</td><td></td><td>15.5</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Other</td><td>0.5</td><td></td><td>4.4</td><td></td></tr><tr><td>Total Non-Current Regulatory Liabilities</td><td>$ 570.5</td><td></td><td>$ 574.0</td><td></td></tr><tr><td></td><td></td><td></td></tr></table>
table
574.0
monetaryItemType
table: <entity> 574.0 </entity> <entity type> monetaryItemType </entity type> <context> Total Non-Current Regulatory Liabilities | $ 570.5 | $ 574.0 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td></tr><tr><td>Assets Acquired</td><td></td><td></td><td></td><td></td></tr><tr><td>Cash and Cash Equivalents</td><td></td><td></td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Accounts Receivable</td><td></td><td></td><td></td><td>1.4</td><td></td></tr><tr><td>Inventory (a) Inventory (a)</td><td></td><td></td><td></td><td>25.3</td><td></td></tr><tr><td>Other Current Assets</td><td></td><td></td><td></td><td>12.8</td><td></td></tr><tr><td>Property, Plant and Equipment - Net</td><td></td><td></td><td></td><td>16.4</td><td></td></tr><tr><td>Goodwill (b) Goodwill (b)</td><td></td><td></td><td></td><td>154.9</td><td></td></tr><tr><td>Other Non-Current Assets</td><td></td><td></td><td></td><td>2.1</td><td></td></tr><tr><td>Total Assets Acquired</td><td></td><td></td><td></td><td>$ 216.8</td><td></td></tr><tr><td>Liabilities Assumed</td><td></td><td></td><td></td><td></td></tr><tr><td>Current Liabilities</td><td></td><td></td><td></td><td>$ 23.6</td><td></td></tr><tr><td>Long-Term Debt Due Within One Year</td><td></td><td></td><td></td><td>28.3</td><td></td></tr><tr><td>Long-Term Debt</td><td></td><td></td><td></td><td>5.9</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td></td><td></td><td></td><td>0.2</td><td></td></tr><tr><td>Total Liabilities Assumed</td><td></td><td></td><td></td><td>$ 58.0</td><td></td></tr><tr><td>Net Identifiable Assets Acquired</td><td></td><td></td><td></td><td>$ 158.8</td><td></td></tr></table>
table
3.9
monetaryItemType
table: <entity> 3.9 </entity> <entity type> monetaryItemType </entity type> <context> Cash and Cash Equivalents | $ 3.9 </context>
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td></tr><tr><td>Assets Acquired</td><td></td><td></td><td></td><td></td></tr><tr><td>Cash and Cash Equivalents</td><td></td><td></td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Accounts Receivable</td><td></td><td></td><td></td><td>1.4</td><td></td></tr><tr><td>Inventory (a) Inventory (a)</td><td></td><td></td><td></td><td>25.3</td><td></td></tr><tr><td>Other Current Assets</td><td></td><td></td><td></td><td>12.8</td><td></td></tr><tr><td>Property, Plant and Equipment - Net</td><td></td><td></td><td></td><td>16.4</td><td></td></tr><tr><td>Goodwill (b) Goodwill (b)</td><td></td><td></td><td></td><td>154.9</td><td></td></tr><tr><td>Other Non-Current Assets</td><td></td><td></td><td></td><td>2.1</td><td></td></tr><tr><td>Total Assets Acquired</td><td></td><td></td><td></td><td>$ 216.8</td><td></td></tr><tr><td>Liabilities Assumed</td><td></td><td></td><td></td><td></td></tr><tr><td>Current Liabilities</td><td></td><td></td><td></td><td>$ 23.6</td><td></td></tr><tr><td>Long-Term Debt Due Within One Year</td><td></td><td></td><td></td><td>28.3</td><td></td></tr><tr><td>Long-Term Debt</td><td></td><td></td><td></td><td>5.9</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td></td><td></td><td></td><td>0.2</td><td></td></tr><tr><td>Total Liabilities Assumed</td><td></td><td></td><td></td><td>$ 58.0</td><td></td></tr><tr><td>Net Identifiable Assets Acquired</td><td></td><td></td><td></td><td>$ 158.8</td><td></td></tr></table>
table
1.4
monetaryItemType
table: <entity> 1.4 </entity> <entity type> monetaryItemType </entity type> <context> Accounts Receivable | 1.4 </context>
us-gaap:BusinessCombinationAcquiredReceivablesFairValue
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td></tr><tr><td>Assets Acquired</td><td></td><td></td><td></td><td></td></tr><tr><td>Cash and Cash Equivalents</td><td></td><td></td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Accounts Receivable</td><td></td><td></td><td></td><td>1.4</td><td></td></tr><tr><td>Inventory (a) Inventory (a)</td><td></td><td></td><td></td><td>25.3</td><td></td></tr><tr><td>Other Current Assets</td><td></td><td></td><td></td><td>12.8</td><td></td></tr><tr><td>Property, Plant and Equipment - Net</td><td></td><td></td><td></td><td>16.4</td><td></td></tr><tr><td>Goodwill (b) Goodwill (b)</td><td></td><td></td><td></td><td>154.9</td><td></td></tr><tr><td>Other Non-Current Assets</td><td></td><td></td><td></td><td>2.1</td><td></td></tr><tr><td>Total Assets Acquired</td><td></td><td></td><td></td><td>$ 216.8</td><td></td></tr><tr><td>Liabilities Assumed</td><td></td><td></td><td></td><td></td></tr><tr><td>Current Liabilities</td><td></td><td></td><td></td><td>$ 23.6</td><td></td></tr><tr><td>Long-Term Debt Due Within One Year</td><td></td><td></td><td></td><td>28.3</td><td></td></tr><tr><td>Long-Term Debt</td><td></td><td></td><td></td><td>5.9</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td></td><td></td><td></td><td>0.2</td><td></td></tr><tr><td>Total Liabilities Assumed</td><td></td><td></td><td></td><td>$ 58.0</td><td></td></tr><tr><td>Net Identifiable Assets Acquired</td><td></td><td></td><td></td><td>$ 158.8</td><td></td></tr></table>
table
25.3
monetaryItemType
table: <entity> 25.3 </entity> <entity type> monetaryItemType </entity type> <context> Inventory (a) Inventory (a) | 25.3 </context>
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td></tr><tr><td>Assets Acquired</td><td></td><td></td><td></td><td></td></tr><tr><td>Cash and Cash Equivalents</td><td></td><td></td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Accounts Receivable</td><td></td><td></td><td></td><td>1.4</td><td></td></tr><tr><td>Inventory (a) Inventory (a)</td><td></td><td></td><td></td><td>25.3</td><td></td></tr><tr><td>Other Current Assets</td><td></td><td></td><td></td><td>12.8</td><td></td></tr><tr><td>Property, Plant and Equipment - Net</td><td></td><td></td><td></td><td>16.4</td><td></td></tr><tr><td>Goodwill (b) Goodwill (b)</td><td></td><td></td><td></td><td>154.9</td><td></td></tr><tr><td>Other Non-Current Assets</td><td></td><td></td><td></td><td>2.1</td><td></td></tr><tr><td>Total Assets Acquired</td><td></td><td></td><td></td><td>$ 216.8</td><td></td></tr><tr><td>Liabilities Assumed</td><td></td><td></td><td></td><td></td></tr><tr><td>Current Liabilities</td><td></td><td></td><td></td><td>$ 23.6</td><td></td></tr><tr><td>Long-Term Debt Due Within One Year</td><td></td><td></td><td></td><td>28.3</td><td></td></tr><tr><td>Long-Term Debt</td><td></td><td></td><td></td><td>5.9</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td></td><td></td><td></td><td>0.2</td><td></td></tr><tr><td>Total Liabilities Assumed</td><td></td><td></td><td></td><td>$ 58.0</td><td></td></tr><tr><td>Net Identifiable Assets Acquired</td><td></td><td></td><td></td><td>$ 158.8</td><td></td></tr></table>
table
12.8
monetaryItemType
table: <entity> 12.8 </entity> <entity type> monetaryItemType </entity type> <context> Other Current Assets | 12.8 </context>
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td></tr><tr><td>Assets Acquired</td><td></td><td></td><td></td><td></td></tr><tr><td>Cash and Cash Equivalents</td><td></td><td></td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Accounts Receivable</td><td></td><td></td><td></td><td>1.4</td><td></td></tr><tr><td>Inventory (a) Inventory (a)</td><td></td><td></td><td></td><td>25.3</td><td></td></tr><tr><td>Other Current Assets</td><td></td><td></td><td></td><td>12.8</td><td></td></tr><tr><td>Property, Plant and Equipment - Net</td><td></td><td></td><td></td><td>16.4</td><td></td></tr><tr><td>Goodwill (b) Goodwill (b)</td><td></td><td></td><td></td><td>154.9</td><td></td></tr><tr><td>Other Non-Current Assets</td><td></td><td></td><td></td><td>2.1</td><td></td></tr><tr><td>Total Assets Acquired</td><td></td><td></td><td></td><td>$ 216.8</td><td></td></tr><tr><td>Liabilities Assumed</td><td></td><td></td><td></td><td></td></tr><tr><td>Current Liabilities</td><td></td><td></td><td></td><td>$ 23.6</td><td></td></tr><tr><td>Long-Term Debt Due Within One Year</td><td></td><td></td><td></td><td>28.3</td><td></td></tr><tr><td>Long-Term Debt</td><td></td><td></td><td></td><td>5.9</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td></td><td></td><td></td><td>0.2</td><td></td></tr><tr><td>Total Liabilities Assumed</td><td></td><td></td><td></td><td>$ 58.0</td><td></td></tr><tr><td>Net Identifiable Assets Acquired</td><td></td><td></td><td></td><td>$ 158.8</td><td></td></tr></table>
table
16.4
monetaryItemType
table: <entity> 16.4 </entity> <entity type> monetaryItemType </entity type> <context> Property, Plant and Equipment - Net | 16.4 </context>
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td></tr><tr><td>Assets Acquired</td><td></td><td></td><td></td><td></td></tr><tr><td>Cash and Cash Equivalents</td><td></td><td></td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Accounts Receivable</td><td></td><td></td><td></td><td>1.4</td><td></td></tr><tr><td>Inventory (a) Inventory (a)</td><td></td><td></td><td></td><td>25.3</td><td></td></tr><tr><td>Other Current Assets</td><td></td><td></td><td></td><td>12.8</td><td></td></tr><tr><td>Property, Plant and Equipment - Net</td><td></td><td></td><td></td><td>16.4</td><td></td></tr><tr><td>Goodwill (b) Goodwill (b)</td><td></td><td></td><td></td><td>154.9</td><td></td></tr><tr><td>Other Non-Current Assets</td><td></td><td></td><td></td><td>2.1</td><td></td></tr><tr><td>Total Assets Acquired</td><td></td><td></td><td></td><td>$ 216.8</td><td></td></tr><tr><td>Liabilities Assumed</td><td></td><td></td><td></td><td></td></tr><tr><td>Current Liabilities</td><td></td><td></td><td></td><td>$ 23.6</td><td></td></tr><tr><td>Long-Term Debt Due Within One Year</td><td></td><td></td><td></td><td>28.3</td><td></td></tr><tr><td>Long-Term Debt</td><td></td><td></td><td></td><td>5.9</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td></td><td></td><td></td><td>0.2</td><td></td></tr><tr><td>Total Liabilities Assumed</td><td></td><td></td><td></td><td>$ 58.0</td><td></td></tr><tr><td>Net Identifiable Assets Acquired</td><td></td><td></td><td></td><td>$ 158.8</td><td></td></tr></table>
table
154.9
monetaryItemType
table: <entity> 154.9 </entity> <entity type> monetaryItemType </entity type> <context> Goodwill (b) Goodwill (b) | 154.9 </context>
us-gaap:Goodwill
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td></tr><tr><td>Assets Acquired</td><td></td><td></td><td></td><td></td></tr><tr><td>Cash and Cash Equivalents</td><td></td><td></td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Accounts Receivable</td><td></td><td></td><td></td><td>1.4</td><td></td></tr><tr><td>Inventory (a) Inventory (a)</td><td></td><td></td><td></td><td>25.3</td><td></td></tr><tr><td>Other Current Assets</td><td></td><td></td><td></td><td>12.8</td><td></td></tr><tr><td>Property, Plant and Equipment - Net</td><td></td><td></td><td></td><td>16.4</td><td></td></tr><tr><td>Goodwill (b) Goodwill (b)</td><td></td><td></td><td></td><td>154.9</td><td></td></tr><tr><td>Other Non-Current Assets</td><td></td><td></td><td></td><td>2.1</td><td></td></tr><tr><td>Total Assets Acquired</td><td></td><td></td><td></td><td>$ 216.8</td><td></td></tr><tr><td>Liabilities Assumed</td><td></td><td></td><td></td><td></td></tr><tr><td>Current Liabilities</td><td></td><td></td><td></td><td>$ 23.6</td><td></td></tr><tr><td>Long-Term Debt Due Within One Year</td><td></td><td></td><td></td><td>28.3</td><td></td></tr><tr><td>Long-Term Debt</td><td></td><td></td><td></td><td>5.9</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td></td><td></td><td></td><td>0.2</td><td></td></tr><tr><td>Total Liabilities Assumed</td><td></td><td></td><td></td><td>$ 58.0</td><td></td></tr><tr><td>Net Identifiable Assets Acquired</td><td></td><td></td><td></td><td>$ 158.8</td><td></td></tr></table>
table
2.1
monetaryItemType
table: <entity> 2.1 </entity> <entity type> monetaryItemType </entity type> <context> Other Non-Current Assets | 2.1 </context>
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td></tr><tr><td>Assets Acquired</td><td></td><td></td><td></td><td></td></tr><tr><td>Cash and Cash Equivalents</td><td></td><td></td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Accounts Receivable</td><td></td><td></td><td></td><td>1.4</td><td></td></tr><tr><td>Inventory (a) Inventory (a)</td><td></td><td></td><td></td><td>25.3</td><td></td></tr><tr><td>Other Current Assets</td><td></td><td></td><td></td><td>12.8</td><td></td></tr><tr><td>Property, Plant and Equipment - Net</td><td></td><td></td><td></td><td>16.4</td><td></td></tr><tr><td>Goodwill (b) Goodwill (b)</td><td></td><td></td><td></td><td>154.9</td><td></td></tr><tr><td>Other Non-Current Assets</td><td></td><td></td><td></td><td>2.1</td><td></td></tr><tr><td>Total Assets Acquired</td><td></td><td></td><td></td><td>$ 216.8</td><td></td></tr><tr><td>Liabilities Assumed</td><td></td><td></td><td></td><td></td></tr><tr><td>Current Liabilities</td><td></td><td></td><td></td><td>$ 23.6</td><td></td></tr><tr><td>Long-Term Debt Due Within One Year</td><td></td><td></td><td></td><td>28.3</td><td></td></tr><tr><td>Long-Term Debt</td><td></td><td></td><td></td><td>5.9</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td></td><td></td><td></td><td>0.2</td><td></td></tr><tr><td>Total Liabilities Assumed</td><td></td><td></td><td></td><td>$ 58.0</td><td></td></tr><tr><td>Net Identifiable Assets Acquired</td><td></td><td></td><td></td><td>$ 158.8</td><td></td></tr></table>
table
216.8
monetaryItemType
table: <entity> 216.8 </entity> <entity type> monetaryItemType </entity type> <context> Total Assets Acquired | $ 216.8 </context>
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td></tr><tr><td>Assets Acquired</td><td></td><td></td><td></td><td></td></tr><tr><td>Cash and Cash Equivalents</td><td></td><td></td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Accounts Receivable</td><td></td><td></td><td></td><td>1.4</td><td></td></tr><tr><td>Inventory (a) Inventory (a)</td><td></td><td></td><td></td><td>25.3</td><td></td></tr><tr><td>Other Current Assets</td><td></td><td></td><td></td><td>12.8</td><td></td></tr><tr><td>Property, Plant and Equipment - Net</td><td></td><td></td><td></td><td>16.4</td><td></td></tr><tr><td>Goodwill (b) Goodwill (b)</td><td></td><td></td><td></td><td>154.9</td><td></td></tr><tr><td>Other Non-Current Assets</td><td></td><td></td><td></td><td>2.1</td><td></td></tr><tr><td>Total Assets Acquired</td><td></td><td></td><td></td><td>$ 216.8</td><td></td></tr><tr><td>Liabilities Assumed</td><td></td><td></td><td></td><td></td></tr><tr><td>Current Liabilities</td><td></td><td></td><td></td><td>$ 23.6</td><td></td></tr><tr><td>Long-Term Debt Due Within One Year</td><td></td><td></td><td></td><td>28.3</td><td></td></tr><tr><td>Long-Term Debt</td><td></td><td></td><td></td><td>5.9</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td></td><td></td><td></td><td>0.2</td><td></td></tr><tr><td>Total Liabilities Assumed</td><td></td><td></td><td></td><td>$ 58.0</td><td></td></tr><tr><td>Net Identifiable Assets Acquired</td><td></td><td></td><td></td><td>$ 158.8</td><td></td></tr></table>
table
23.6
monetaryItemType
table: <entity> 23.6 </entity> <entity type> monetaryItemType </entity type> <context> Current Liabilities | $ 23.6 </context>
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td></tr><tr><td>Assets Acquired</td><td></td><td></td><td></td><td></td></tr><tr><td>Cash and Cash Equivalents</td><td></td><td></td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Accounts Receivable</td><td></td><td></td><td></td><td>1.4</td><td></td></tr><tr><td>Inventory (a) Inventory (a)</td><td></td><td></td><td></td><td>25.3</td><td></td></tr><tr><td>Other Current Assets</td><td></td><td></td><td></td><td>12.8</td><td></td></tr><tr><td>Property, Plant and Equipment - Net</td><td></td><td></td><td></td><td>16.4</td><td></td></tr><tr><td>Goodwill (b) Goodwill (b)</td><td></td><td></td><td></td><td>154.9</td><td></td></tr><tr><td>Other Non-Current Assets</td><td></td><td></td><td></td><td>2.1</td><td></td></tr><tr><td>Total Assets Acquired</td><td></td><td></td><td></td><td>$ 216.8</td><td></td></tr><tr><td>Liabilities Assumed</td><td></td><td></td><td></td><td></td></tr><tr><td>Current Liabilities</td><td></td><td></td><td></td><td>$ 23.6</td><td></td></tr><tr><td>Long-Term Debt Due Within One Year</td><td></td><td></td><td></td><td>28.3</td><td></td></tr><tr><td>Long-Term Debt</td><td></td><td></td><td></td><td>5.9</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td></td><td></td><td></td><td>0.2</td><td></td></tr><tr><td>Total Liabilities Assumed</td><td></td><td></td><td></td><td>$ 58.0</td><td></td></tr><tr><td>Net Identifiable Assets Acquired</td><td></td><td></td><td></td><td>$ 158.8</td><td></td></tr></table>
table
28.3
monetaryItemType
table: <entity> 28.3 </entity> <entity type> monetaryItemType </entity type> <context> Long-Term Debt Due Within One Year | 28.3 </context>
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLongTermDebt
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td></tr><tr><td>Assets Acquired</td><td></td><td></td><td></td><td></td></tr><tr><td>Cash and Cash Equivalents</td><td></td><td></td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Accounts Receivable</td><td></td><td></td><td></td><td>1.4</td><td></td></tr><tr><td>Inventory (a) Inventory (a)</td><td></td><td></td><td></td><td>25.3</td><td></td></tr><tr><td>Other Current Assets</td><td></td><td></td><td></td><td>12.8</td><td></td></tr><tr><td>Property, Plant and Equipment - Net</td><td></td><td></td><td></td><td>16.4</td><td></td></tr><tr><td>Goodwill (b) Goodwill (b)</td><td></td><td></td><td></td><td>154.9</td><td></td></tr><tr><td>Other Non-Current Assets</td><td></td><td></td><td></td><td>2.1</td><td></td></tr><tr><td>Total Assets Acquired</td><td></td><td></td><td></td><td>$ 216.8</td><td></td></tr><tr><td>Liabilities Assumed</td><td></td><td></td><td></td><td></td></tr><tr><td>Current Liabilities</td><td></td><td></td><td></td><td>$ 23.6</td><td></td></tr><tr><td>Long-Term Debt Due Within One Year</td><td></td><td></td><td></td><td>28.3</td><td></td></tr><tr><td>Long-Term Debt</td><td></td><td></td><td></td><td>5.9</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td></td><td></td><td></td><td>0.2</td><td></td></tr><tr><td>Total Liabilities Assumed</td><td></td><td></td><td></td><td>$ 58.0</td><td></td></tr><tr><td>Net Identifiable Assets Acquired</td><td></td><td></td><td></td><td>$ 158.8</td><td></td></tr></table>
table
5.9
monetaryItemType
table: <entity> 5.9 </entity> <entity type> monetaryItemType </entity type> <context> Long-Term Debt | 5.9 </context>
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td></tr><tr><td>Assets Acquired</td><td></td><td></td><td></td><td></td></tr><tr><td>Cash and Cash Equivalents</td><td></td><td></td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Accounts Receivable</td><td></td><td></td><td></td><td>1.4</td><td></td></tr><tr><td>Inventory (a) Inventory (a)</td><td></td><td></td><td></td><td>25.3</td><td></td></tr><tr><td>Other Current Assets</td><td></td><td></td><td></td><td>12.8</td><td></td></tr><tr><td>Property, Plant and Equipment - Net</td><td></td><td></td><td></td><td>16.4</td><td></td></tr><tr><td>Goodwill (b) Goodwill (b)</td><td></td><td></td><td></td><td>154.9</td><td></td></tr><tr><td>Other Non-Current Assets</td><td></td><td></td><td></td><td>2.1</td><td></td></tr><tr><td>Total Assets Acquired</td><td></td><td></td><td></td><td>$ 216.8</td><td></td></tr><tr><td>Liabilities Assumed</td><td></td><td></td><td></td><td></td></tr><tr><td>Current Liabilities</td><td></td><td></td><td></td><td>$ 23.6</td><td></td></tr><tr><td>Long-Term Debt Due Within One Year</td><td></td><td></td><td></td><td>28.3</td><td></td></tr><tr><td>Long-Term Debt</td><td></td><td></td><td></td><td>5.9</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td></td><td></td><td></td><td>0.2</td><td></td></tr><tr><td>Total Liabilities Assumed</td><td></td><td></td><td></td><td>$ 58.0</td><td></td></tr><tr><td>Net Identifiable Assets Acquired</td><td></td><td></td><td></td><td>$ 158.8</td><td></td></tr></table>
table
0.2
monetaryItemType
table: <entity> 0.2 </entity> <entity type> monetaryItemType </entity type> <context> Other Non-Current Liabilities | 0.2 </context>
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td></tr><tr><td>Assets Acquired</td><td></td><td></td><td></td><td></td></tr><tr><td>Cash and Cash Equivalents</td><td></td><td></td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Accounts Receivable</td><td></td><td></td><td></td><td>1.4</td><td></td></tr><tr><td>Inventory (a) Inventory (a)</td><td></td><td></td><td></td><td>25.3</td><td></td></tr><tr><td>Other Current Assets</td><td></td><td></td><td></td><td>12.8</td><td></td></tr><tr><td>Property, Plant and Equipment - Net</td><td></td><td></td><td></td><td>16.4</td><td></td></tr><tr><td>Goodwill (b) Goodwill (b)</td><td></td><td></td><td></td><td>154.9</td><td></td></tr><tr><td>Other Non-Current Assets</td><td></td><td></td><td></td><td>2.1</td><td></td></tr><tr><td>Total Assets Acquired</td><td></td><td></td><td></td><td>$ 216.8</td><td></td></tr><tr><td>Liabilities Assumed</td><td></td><td></td><td></td><td></td></tr><tr><td>Current Liabilities</td><td></td><td></td><td></td><td>$ 23.6</td><td></td></tr><tr><td>Long-Term Debt Due Within One Year</td><td></td><td></td><td></td><td>28.3</td><td></td></tr><tr><td>Long-Term Debt</td><td></td><td></td><td></td><td>5.9</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td></td><td></td><td></td><td>0.2</td><td></td></tr><tr><td>Total Liabilities Assumed</td><td></td><td></td><td></td><td>$ 58.0</td><td></td></tr><tr><td>Net Identifiable Assets Acquired</td><td></td><td></td><td></td><td>$ 158.8</td><td></td></tr></table>
table
58.0
monetaryItemType
table: <entity> 58.0 </entity> <entity type> monetaryItemType </entity type> <context> Total Liabilities Assumed | $ 58.0 </context>
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td></tr><tr><td>Assets Acquired</td><td></td><td></td><td></td><td></td></tr><tr><td>Cash and Cash Equivalents</td><td></td><td></td><td></td><td>$ 3.9</td><td></td></tr><tr><td>Accounts Receivable</td><td></td><td></td><td></td><td>1.4</td><td></td></tr><tr><td>Inventory (a) Inventory (a)</td><td></td><td></td><td></td><td>25.3</td><td></td></tr><tr><td>Other Current Assets</td><td></td><td></td><td></td><td>12.8</td><td></td></tr><tr><td>Property, Plant and Equipment - Net</td><td></td><td></td><td></td><td>16.4</td><td></td></tr><tr><td>Goodwill (b) Goodwill (b)</td><td></td><td></td><td></td><td>154.9</td><td></td></tr><tr><td>Other Non-Current Assets</td><td></td><td></td><td></td><td>2.1</td><td></td></tr><tr><td>Total Assets Acquired</td><td></td><td></td><td></td><td>$ 216.8</td><td></td></tr><tr><td>Liabilities Assumed</td><td></td><td></td><td></td><td></td></tr><tr><td>Current Liabilities</td><td></td><td></td><td></td><td>$ 23.6</td><td></td></tr><tr><td>Long-Term Debt Due Within One Year</td><td></td><td></td><td></td><td>28.3</td><td></td></tr><tr><td>Long-Term Debt</td><td></td><td></td><td></td><td>5.9</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td></td><td></td><td></td><td>0.2</td><td></td></tr><tr><td>Total Liabilities Assumed</td><td></td><td></td><td></td><td>$ 58.0</td><td></td></tr><tr><td>Net Identifiable Assets Acquired</td><td></td><td></td><td></td><td>$ 158.8</td><td></td></tr></table>
table
158.8
monetaryItemType
table: <entity> 158.8 </entity> <entity type> monetaryItemType </entity type> <context> Net Identifiable Assets Acquired | $ 158.8 </context>
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ALLETE’s Investment in ATC</td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Equity Investment Beginning Balance</td><td>$ 179.7</td><td></td><td>$ 165.4</td><td></td></tr><tr><td>Cash Investments</td><td>5.8</td><td></td><td>8.2</td><td></td></tr><tr><td>Equity in ATC Earnings</td><td>26.5</td><td></td><td>23.1</td><td></td></tr><tr><td>Distributed ATC Earnings</td><td>( 18.9 )</td><td></td><td>( 18.3 )</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Amortization of the Remeasurement of Deferred Income Taxes</td><td>1.3</td><td></td><td>1.3</td><td></td></tr><tr><td>Equity Investment Ending Balance</td><td>$ 194.4</td><td></td><td>$ 179.7</td><td></td></tr></table>
table
179.7
monetaryItemType
table: <entity> 179.7 </entity> <entity type> monetaryItemType </entity type> <context> Equity Investment Beginning Balance | $ 179.7 | $ 165.4 </context>
us-gaap:EquityMethodInvestments
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ALLETE’s Investment in ATC</td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Equity Investment Beginning Balance</td><td>$ 179.7</td><td></td><td>$ 165.4</td><td></td></tr><tr><td>Cash Investments</td><td>5.8</td><td></td><td>8.2</td><td></td></tr><tr><td>Equity in ATC Earnings</td><td>26.5</td><td></td><td>23.1</td><td></td></tr><tr><td>Distributed ATC Earnings</td><td>( 18.9 )</td><td></td><td>( 18.3 )</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Amortization of the Remeasurement of Deferred Income Taxes</td><td>1.3</td><td></td><td>1.3</td><td></td></tr><tr><td>Equity Investment Ending Balance</td><td>$ 194.4</td><td></td><td>$ 179.7</td><td></td></tr></table>
table
165.4
monetaryItemType
table: <entity> 165.4 </entity> <entity type> monetaryItemType </entity type> <context> Equity Investment Beginning Balance | $ 179.7 | $ 165.4 </context>
us-gaap:EquityMethodInvestments
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ALLETE’s Investment in ATC</td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Equity Investment Beginning Balance</td><td>$ 179.7</td><td></td><td>$ 165.4</td><td></td></tr><tr><td>Cash Investments</td><td>5.8</td><td></td><td>8.2</td><td></td></tr><tr><td>Equity in ATC Earnings</td><td>26.5</td><td></td><td>23.1</td><td></td></tr><tr><td>Distributed ATC Earnings</td><td>( 18.9 )</td><td></td><td>( 18.3 )</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Amortization of the Remeasurement of Deferred Income Taxes</td><td>1.3</td><td></td><td>1.3</td><td></td></tr><tr><td>Equity Investment Ending Balance</td><td>$ 194.4</td><td></td><td>$ 179.7</td><td></td></tr></table>
table
5.8
monetaryItemType
table: <entity> 5.8 </entity> <entity type> monetaryItemType </entity type> <context> Cash Investments | 5.8 | 8.2 </context>
us-gaap:PaymentsToAcquireEquityMethodInvestments
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ALLETE’s Investment in ATC</td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Equity Investment Beginning Balance</td><td>$ 179.7</td><td></td><td>$ 165.4</td><td></td></tr><tr><td>Cash Investments</td><td>5.8</td><td></td><td>8.2</td><td></td></tr><tr><td>Equity in ATC Earnings</td><td>26.5</td><td></td><td>23.1</td><td></td></tr><tr><td>Distributed ATC Earnings</td><td>( 18.9 )</td><td></td><td>( 18.3 )</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Amortization of the Remeasurement of Deferred Income Taxes</td><td>1.3</td><td></td><td>1.3</td><td></td></tr><tr><td>Equity Investment Ending Balance</td><td>$ 194.4</td><td></td><td>$ 179.7</td><td></td></tr></table>
table
8.2
monetaryItemType
table: <entity> 8.2 </entity> <entity type> monetaryItemType </entity type> <context> Cash Investments | 5.8 | 8.2 </context>
us-gaap:PaymentsToAcquireEquityMethodInvestments
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ALLETE’s Investment in ATC</td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Equity Investment Beginning Balance</td><td>$ 179.7</td><td></td><td>$ 165.4</td><td></td></tr><tr><td>Cash Investments</td><td>5.8</td><td></td><td>8.2</td><td></td></tr><tr><td>Equity in ATC Earnings</td><td>26.5</td><td></td><td>23.1</td><td></td></tr><tr><td>Distributed ATC Earnings</td><td>( 18.9 )</td><td></td><td>( 18.3 )</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Amortization of the Remeasurement of Deferred Income Taxes</td><td>1.3</td><td></td><td>1.3</td><td></td></tr><tr><td>Equity Investment Ending Balance</td><td>$ 194.4</td><td></td><td>$ 179.7</td><td></td></tr></table>
table
26.5
monetaryItemType
table: <entity> 26.5 </entity> <entity type> monetaryItemType </entity type> <context> Equity in ATC Earnings | 26.5 | 23.1 </context>
us-gaap:IncomeLossFromEquityMethodInvestments
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ALLETE’s Investment in ATC</td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Equity Investment Beginning Balance</td><td>$ 179.7</td><td></td><td>$ 165.4</td><td></td></tr><tr><td>Cash Investments</td><td>5.8</td><td></td><td>8.2</td><td></td></tr><tr><td>Equity in ATC Earnings</td><td>26.5</td><td></td><td>23.1</td><td></td></tr><tr><td>Distributed ATC Earnings</td><td>( 18.9 )</td><td></td><td>( 18.3 )</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Amortization of the Remeasurement of Deferred Income Taxes</td><td>1.3</td><td></td><td>1.3</td><td></td></tr><tr><td>Equity Investment Ending Balance</td><td>$ 194.4</td><td></td><td>$ 179.7</td><td></td></tr></table>
table
23.1
monetaryItemType
table: <entity> 23.1 </entity> <entity type> monetaryItemType </entity type> <context> Equity in ATC Earnings | 26.5 | 23.1 </context>
us-gaap:IncomeLossFromEquityMethodInvestments
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ALLETE’s Investment in ATC</td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Equity Investment Beginning Balance</td><td>$ 179.7</td><td></td><td>$ 165.4</td><td></td></tr><tr><td>Cash Investments</td><td>5.8</td><td></td><td>8.2</td><td></td></tr><tr><td>Equity in ATC Earnings</td><td>26.5</td><td></td><td>23.1</td><td></td></tr><tr><td>Distributed ATC Earnings</td><td>( 18.9 )</td><td></td><td>( 18.3 )</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Amortization of the Remeasurement of Deferred Income Taxes</td><td>1.3</td><td></td><td>1.3</td><td></td></tr><tr><td>Equity Investment Ending Balance</td><td>$ 194.4</td><td></td><td>$ 179.7</td><td></td></tr></table>
table
18.9
monetaryItemType
table: <entity> 18.9 </entity> <entity type> monetaryItemType </entity type> <context> None </context>
us-gaap:EquityMethodInvestmentDividendsOrDistributions
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ALLETE’s Investment in ATC</td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Equity Investment Beginning Balance</td><td>$ 179.7</td><td></td><td>$ 165.4</td><td></td></tr><tr><td>Cash Investments</td><td>5.8</td><td></td><td>8.2</td><td></td></tr><tr><td>Equity in ATC Earnings</td><td>26.5</td><td></td><td>23.1</td><td></td></tr><tr><td>Distributed ATC Earnings</td><td>( 18.9 )</td><td></td><td>( 18.3 )</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Amortization of the Remeasurement of Deferred Income Taxes</td><td>1.3</td><td></td><td>1.3</td><td></td></tr><tr><td>Equity Investment Ending Balance</td><td>$ 194.4</td><td></td><td>$ 179.7</td><td></td></tr></table>
table
18.3
monetaryItemType
table: <entity> 18.3 </entity> <entity type> monetaryItemType </entity type> <context> None </context>
us-gaap:EquityMethodInvestmentDividendsOrDistributions
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ALLETE’s Investment in ATC</td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Equity Investment Beginning Balance</td><td>$ 179.7</td><td></td><td>$ 165.4</td><td></td></tr><tr><td>Cash Investments</td><td>5.8</td><td></td><td>8.2</td><td></td></tr><tr><td>Equity in ATC Earnings</td><td>26.5</td><td></td><td>23.1</td><td></td></tr><tr><td>Distributed ATC Earnings</td><td>( 18.9 )</td><td></td><td>( 18.3 )</td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Amortization of the Remeasurement of Deferred Income Taxes</td><td>1.3</td><td></td><td>1.3</td><td></td></tr><tr><td>Equity Investment Ending Balance</td><td>$ 194.4</td><td></td><td>$ 179.7</td><td></td></tr></table>
table
194.4
monetaryItemType
table: <entity> 194.4 </entity> <entity type> monetaryItemType </entity type> <context> Equity Investment Ending Balance | $ 194.4 | $ 179.7 </context>
us-gaap:EquityMethodInvestments
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ATC Summarized Financial Data</td><td></td><td></td></tr><tr><td>Balance Sheet Data</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Assets</td><td>$ 126.6</td><td></td><td>$ 115.2</td><td></td></tr><tr><td>Non-Current Assets</td><td>6,792.6</td><td></td><td>6,337.0</td><td></td></tr><tr><td>Total Assets</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr><tr><td>Current Liabilities</td><td>$ 482.4</td><td></td><td>$ 495.9</td><td></td></tr><tr><td>Long-Term Debt</td><td>3,083.4</td><td></td><td>2,736.0</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td>545.0</td><td></td><td>585.2</td><td></td></tr><tr><td>Members’ Equity</td><td>2,808.4</td><td></td><td>2,635.1</td><td></td></tr><tr><td>Total Liabilities and Members’ Equity</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr></table>
table
126.6
monetaryItemType
table: <entity> 126.6 </entity> <entity type> monetaryItemType </entity type> <context> Current Assets | $ 126.6 | $ 115.2 </context>
us-gaap:AssetsCurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ATC Summarized Financial Data</td><td></td><td></td></tr><tr><td>Balance Sheet Data</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Assets</td><td>$ 126.6</td><td></td><td>$ 115.2</td><td></td></tr><tr><td>Non-Current Assets</td><td>6,792.6</td><td></td><td>6,337.0</td><td></td></tr><tr><td>Total Assets</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr><tr><td>Current Liabilities</td><td>$ 482.4</td><td></td><td>$ 495.9</td><td></td></tr><tr><td>Long-Term Debt</td><td>3,083.4</td><td></td><td>2,736.0</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td>545.0</td><td></td><td>585.2</td><td></td></tr><tr><td>Members’ Equity</td><td>2,808.4</td><td></td><td>2,635.1</td><td></td></tr><tr><td>Total Liabilities and Members’ Equity</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr></table>
table
115.2
monetaryItemType
table: <entity> 115.2 </entity> <entity type> monetaryItemType </entity type> <context> Current Assets | $ 126.6 | $ 115.2 </context>
us-gaap:AssetsCurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ATC Summarized Financial Data</td><td></td><td></td></tr><tr><td>Balance Sheet Data</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Assets</td><td>$ 126.6</td><td></td><td>$ 115.2</td><td></td></tr><tr><td>Non-Current Assets</td><td>6,792.6</td><td></td><td>6,337.0</td><td></td></tr><tr><td>Total Assets</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr><tr><td>Current Liabilities</td><td>$ 482.4</td><td></td><td>$ 495.9</td><td></td></tr><tr><td>Long-Term Debt</td><td>3,083.4</td><td></td><td>2,736.0</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td>545.0</td><td></td><td>585.2</td><td></td></tr><tr><td>Members’ Equity</td><td>2,808.4</td><td></td><td>2,635.1</td><td></td></tr><tr><td>Total Liabilities and Members’ Equity</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr></table>
table
6792.6
monetaryItemType
table: <entity> 6792.6 </entity> <entity type> monetaryItemType </entity type> <context> Non-Current Assets | 6,792.6 | 6,337.0 </context>
us-gaap:AssetsNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ATC Summarized Financial Data</td><td></td><td></td></tr><tr><td>Balance Sheet Data</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Assets</td><td>$ 126.6</td><td></td><td>$ 115.2</td><td></td></tr><tr><td>Non-Current Assets</td><td>6,792.6</td><td></td><td>6,337.0</td><td></td></tr><tr><td>Total Assets</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr><tr><td>Current Liabilities</td><td>$ 482.4</td><td></td><td>$ 495.9</td><td></td></tr><tr><td>Long-Term Debt</td><td>3,083.4</td><td></td><td>2,736.0</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td>545.0</td><td></td><td>585.2</td><td></td></tr><tr><td>Members’ Equity</td><td>2,808.4</td><td></td><td>2,635.1</td><td></td></tr><tr><td>Total Liabilities and Members’ Equity</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr></table>
table
6337.0
monetaryItemType
table: <entity> 6337.0 </entity> <entity type> monetaryItemType </entity type> <context> Non-Current Assets | 6,792.6 | 6,337.0 </context>
us-gaap:AssetsNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ATC Summarized Financial Data</td><td></td><td></td></tr><tr><td>Balance Sheet Data</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Assets</td><td>$ 126.6</td><td></td><td>$ 115.2</td><td></td></tr><tr><td>Non-Current Assets</td><td>6,792.6</td><td></td><td>6,337.0</td><td></td></tr><tr><td>Total Assets</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr><tr><td>Current Liabilities</td><td>$ 482.4</td><td></td><td>$ 495.9</td><td></td></tr><tr><td>Long-Term Debt</td><td>3,083.4</td><td></td><td>2,736.0</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td>545.0</td><td></td><td>585.2</td><td></td></tr><tr><td>Members’ Equity</td><td>2,808.4</td><td></td><td>2,635.1</td><td></td></tr><tr><td>Total Liabilities and Members’ Equity</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr></table>
table
6919.2
monetaryItemType
table: <entity> 6919.2 </entity> <entity type> monetaryItemType </entity type> <context> Total Assets | $ 6,919.2 | $ 6,452.2 </context>
us-gaap:Assets
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ATC Summarized Financial Data</td><td></td><td></td></tr><tr><td>Balance Sheet Data</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Assets</td><td>$ 126.6</td><td></td><td>$ 115.2</td><td></td></tr><tr><td>Non-Current Assets</td><td>6,792.6</td><td></td><td>6,337.0</td><td></td></tr><tr><td>Total Assets</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr><tr><td>Current Liabilities</td><td>$ 482.4</td><td></td><td>$ 495.9</td><td></td></tr><tr><td>Long-Term Debt</td><td>3,083.4</td><td></td><td>2,736.0</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td>545.0</td><td></td><td>585.2</td><td></td></tr><tr><td>Members’ Equity</td><td>2,808.4</td><td></td><td>2,635.1</td><td></td></tr><tr><td>Total Liabilities and Members’ Equity</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr></table>
table
6452.2
monetaryItemType
table: <entity> 6452.2 </entity> <entity type> monetaryItemType </entity type> <context> Total Assets | $ 6,919.2 | $ 6,452.2 </context>
us-gaap:Assets
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ATC Summarized Financial Data</td><td></td><td></td></tr><tr><td>Balance Sheet Data</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Assets</td><td>$ 126.6</td><td></td><td>$ 115.2</td><td></td></tr><tr><td>Non-Current Assets</td><td>6,792.6</td><td></td><td>6,337.0</td><td></td></tr><tr><td>Total Assets</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr><tr><td>Current Liabilities</td><td>$ 482.4</td><td></td><td>$ 495.9</td><td></td></tr><tr><td>Long-Term Debt</td><td>3,083.4</td><td></td><td>2,736.0</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td>545.0</td><td></td><td>585.2</td><td></td></tr><tr><td>Members’ Equity</td><td>2,808.4</td><td></td><td>2,635.1</td><td></td></tr><tr><td>Total Liabilities and Members’ Equity</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr></table>
table
482.4
monetaryItemType
table: <entity> 482.4 </entity> <entity type> monetaryItemType </entity type> <context> Current Liabilities | $ 482.4 | $ 495.9 </context>
us-gaap:LiabilitiesCurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ATC Summarized Financial Data</td><td></td><td></td></tr><tr><td>Balance Sheet Data</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Assets</td><td>$ 126.6</td><td></td><td>$ 115.2</td><td></td></tr><tr><td>Non-Current Assets</td><td>6,792.6</td><td></td><td>6,337.0</td><td></td></tr><tr><td>Total Assets</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr><tr><td>Current Liabilities</td><td>$ 482.4</td><td></td><td>$ 495.9</td><td></td></tr><tr><td>Long-Term Debt</td><td>3,083.4</td><td></td><td>2,736.0</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td>545.0</td><td></td><td>585.2</td><td></td></tr><tr><td>Members’ Equity</td><td>2,808.4</td><td></td><td>2,635.1</td><td></td></tr><tr><td>Total Liabilities and Members’ Equity</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr></table>
table
495.9
monetaryItemType
table: <entity> 495.9 </entity> <entity type> monetaryItemType </entity type> <context> Current Liabilities | $ 482.4 | $ 495.9 </context>
us-gaap:LiabilitiesCurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ATC Summarized Financial Data</td><td></td><td></td></tr><tr><td>Balance Sheet Data</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Assets</td><td>$ 126.6</td><td></td><td>$ 115.2</td><td></td></tr><tr><td>Non-Current Assets</td><td>6,792.6</td><td></td><td>6,337.0</td><td></td></tr><tr><td>Total Assets</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr><tr><td>Current Liabilities</td><td>$ 482.4</td><td></td><td>$ 495.9</td><td></td></tr><tr><td>Long-Term Debt</td><td>3,083.4</td><td></td><td>2,736.0</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td>545.0</td><td></td><td>585.2</td><td></td></tr><tr><td>Members’ Equity</td><td>2,808.4</td><td></td><td>2,635.1</td><td></td></tr><tr><td>Total Liabilities and Members’ Equity</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr></table>
table
2808.4
monetaryItemType
table: <entity> 2808.4 </entity> <entity type> monetaryItemType </entity type> <context> Members’ Equity | 2,808.4 | 2,635.1 </context>
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ATC Summarized Financial Data</td><td></td><td></td></tr><tr><td>Balance Sheet Data</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Assets</td><td>$ 126.6</td><td></td><td>$ 115.2</td><td></td></tr><tr><td>Non-Current Assets</td><td>6,792.6</td><td></td><td>6,337.0</td><td></td></tr><tr><td>Total Assets</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr><tr><td>Current Liabilities</td><td>$ 482.4</td><td></td><td>$ 495.9</td><td></td></tr><tr><td>Long-Term Debt</td><td>3,083.4</td><td></td><td>2,736.0</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td>545.0</td><td></td><td>585.2</td><td></td></tr><tr><td>Members’ Equity</td><td>2,808.4</td><td></td><td>2,635.1</td><td></td></tr><tr><td>Total Liabilities and Members’ Equity</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr></table>
table
2635.1
monetaryItemType
table: <entity> 2635.1 </entity> <entity type> monetaryItemType </entity type> <context> Members’ Equity | 2,808.4 | 2,635.1 </context>
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ATC Summarized Financial Data</td><td></td><td></td></tr><tr><td>Balance Sheet Data</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Assets</td><td>$ 126.6</td><td></td><td>$ 115.2</td><td></td></tr><tr><td>Non-Current Assets</td><td>6,792.6</td><td></td><td>6,337.0</td><td></td></tr><tr><td>Total Assets</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr><tr><td>Current Liabilities</td><td>$ 482.4</td><td></td><td>$ 495.9</td><td></td></tr><tr><td>Long-Term Debt</td><td>3,083.4</td><td></td><td>2,736.0</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td>545.0</td><td></td><td>585.2</td><td></td></tr><tr><td>Members’ Equity</td><td>2,808.4</td><td></td><td>2,635.1</td><td></td></tr><tr><td>Total Liabilities and Members’ Equity</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr></table>
table
6919.2
monetaryItemType
table: <entity> 6919.2 </entity> <entity type> monetaryItemType </entity type> <context> Total Assets | $ 6,919.2 | $ 6,452.2 </context>
us-gaap:LiabilitiesAndStockholdersEquity
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ATC Summarized Financial Data</td><td></td><td></td></tr><tr><td>Balance Sheet Data</td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Current Assets</td><td>$ 126.6</td><td></td><td>$ 115.2</td><td></td></tr><tr><td>Non-Current Assets</td><td>6,792.6</td><td></td><td>6,337.0</td><td></td></tr><tr><td>Total Assets</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr><tr><td>Current Liabilities</td><td>$ 482.4</td><td></td><td>$ 495.9</td><td></td></tr><tr><td>Long-Term Debt</td><td>3,083.4</td><td></td><td>2,736.0</td><td></td></tr><tr><td>Other Non-Current Liabilities</td><td>545.0</td><td></td><td>585.2</td><td></td></tr><tr><td>Members’ Equity</td><td>2,808.4</td><td></td><td>2,635.1</td><td></td></tr><tr><td>Total Liabilities and Members’ Equity</td><td>$ 6,919.2</td><td></td><td>$ 6,452.2</td><td></td></tr></table>
table
6452.2
monetaryItemType
table: <entity> 6452.2 </entity> <entity type> monetaryItemType </entity type> <context> Total Assets | $ 6,919.2 | $ 6,452.2 </context>
us-gaap:LiabilitiesAndStockholdersEquity
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Income Statement Data</td><td></td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td><td>2022</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>Revenue</td><td>$ 911.3</td><td></td><td>$ 818.9</td><td></td><td>$ 751.2</td><td></td></tr><tr><td>Operating Expense</td><td>442.3</td><td></td><td>407.6</td><td></td><td>381.5</td><td></td></tr><tr><td>Other Expense</td><td>137.8</td><td></td><td>131.7</td><td></td><td>122.9</td><td></td></tr><tr><td>Net Income</td><td>$ 331.2</td><td></td><td>$ 279.6</td><td></td><td>$ 246.8</td><td></td></tr><tr><td>ALLETE’s Equity in Net Income</td><td>$ 26.5</td><td></td><td>$ 23.1</td><td></td><td>$ 19.3</td><td></td></tr></table>
table
911.3
monetaryItemType
table: <entity> 911.3 </entity> <entity type> monetaryItemType </entity type> <context> Revenue | $ 911.3 | $ 818.9 | $ 751.2 </context>
us-gaap:Revenues
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Income Statement Data</td><td></td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td><td>2022</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>Revenue</td><td>$ 911.3</td><td></td><td>$ 818.9</td><td></td><td>$ 751.2</td><td></td></tr><tr><td>Operating Expense</td><td>442.3</td><td></td><td>407.6</td><td></td><td>381.5</td><td></td></tr><tr><td>Other Expense</td><td>137.8</td><td></td><td>131.7</td><td></td><td>122.9</td><td></td></tr><tr><td>Net Income</td><td>$ 331.2</td><td></td><td>$ 279.6</td><td></td><td>$ 246.8</td><td></td></tr><tr><td>ALLETE’s Equity in Net Income</td><td>$ 26.5</td><td></td><td>$ 23.1</td><td></td><td>$ 19.3</td><td></td></tr></table>
table
818.9
monetaryItemType
table: <entity> 818.9 </entity> <entity type> monetaryItemType </entity type> <context> Revenue | $ 911.3 | $ 818.9 | $ 751.2 </context>
us-gaap:Revenues
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Income Statement Data</td><td></td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td><td>2022</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>Revenue</td><td>$ 911.3</td><td></td><td>$ 818.9</td><td></td><td>$ 751.2</td><td></td></tr><tr><td>Operating Expense</td><td>442.3</td><td></td><td>407.6</td><td></td><td>381.5</td><td></td></tr><tr><td>Other Expense</td><td>137.8</td><td></td><td>131.7</td><td></td><td>122.9</td><td></td></tr><tr><td>Net Income</td><td>$ 331.2</td><td></td><td>$ 279.6</td><td></td><td>$ 246.8</td><td></td></tr><tr><td>ALLETE’s Equity in Net Income</td><td>$ 26.5</td><td></td><td>$ 23.1</td><td></td><td>$ 19.3</td><td></td></tr></table>
table
751.2
monetaryItemType
table: <entity> 751.2 </entity> <entity type> monetaryItemType </entity type> <context> Revenue | $ 911.3 | $ 818.9 | $ 751.2 </context>
us-gaap:Revenues
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Income Statement Data</td><td></td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td><td>2022</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>Revenue</td><td>$ 911.3</td><td></td><td>$ 818.9</td><td></td><td>$ 751.2</td><td></td></tr><tr><td>Operating Expense</td><td>442.3</td><td></td><td>407.6</td><td></td><td>381.5</td><td></td></tr><tr><td>Other Expense</td><td>137.8</td><td></td><td>131.7</td><td></td><td>122.9</td><td></td></tr><tr><td>Net Income</td><td>$ 331.2</td><td></td><td>$ 279.6</td><td></td><td>$ 246.8</td><td></td></tr><tr><td>ALLETE’s Equity in Net Income</td><td>$ 26.5</td><td></td><td>$ 23.1</td><td></td><td>$ 19.3</td><td></td></tr></table>
table
331.2
monetaryItemType
table: <entity> 331.2 </entity> <entity type> monetaryItemType </entity type> <context> Net Income | $ 331.2 | $ 279.6 | $ 246.8 </context>
us-gaap:ProfitLoss
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Income Statement Data</td><td></td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td><td>2022</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>Revenue</td><td>$ 911.3</td><td></td><td>$ 818.9</td><td></td><td>$ 751.2</td><td></td></tr><tr><td>Operating Expense</td><td>442.3</td><td></td><td>407.6</td><td></td><td>381.5</td><td></td></tr><tr><td>Other Expense</td><td>137.8</td><td></td><td>131.7</td><td></td><td>122.9</td><td></td></tr><tr><td>Net Income</td><td>$ 331.2</td><td></td><td>$ 279.6</td><td></td><td>$ 246.8</td><td></td></tr><tr><td>ALLETE’s Equity in Net Income</td><td>$ 26.5</td><td></td><td>$ 23.1</td><td></td><td>$ 19.3</td><td></td></tr></table>
table
279.6
monetaryItemType
table: <entity> 279.6 </entity> <entity type> monetaryItemType </entity type> <context> Net Income | $ 331.2 | $ 279.6 | $ 246.8 </context>
us-gaap:ProfitLoss
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Income Statement Data</td><td></td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td><td>2022</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>Revenue</td><td>$ 911.3</td><td></td><td>$ 818.9</td><td></td><td>$ 751.2</td><td></td></tr><tr><td>Operating Expense</td><td>442.3</td><td></td><td>407.6</td><td></td><td>381.5</td><td></td></tr><tr><td>Other Expense</td><td>137.8</td><td></td><td>131.7</td><td></td><td>122.9</td><td></td></tr><tr><td>Net Income</td><td>$ 331.2</td><td></td><td>$ 279.6</td><td></td><td>$ 246.8</td><td></td></tr><tr><td>ALLETE’s Equity in Net Income</td><td>$ 26.5</td><td></td><td>$ 23.1</td><td></td><td>$ 19.3</td><td></td></tr></table>
table
246.8
monetaryItemType
table: <entity> 246.8 </entity> <entity type> monetaryItemType </entity type> <context> Net Income | $ 331.2 | $ 279.6 | $ 246.8 </context>
us-gaap:ProfitLoss
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Income Statement Data</td><td></td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td><td>2022</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>Revenue</td><td>$ 911.3</td><td></td><td>$ 818.9</td><td></td><td>$ 751.2</td><td></td></tr><tr><td>Operating Expense</td><td>442.3</td><td></td><td>407.6</td><td></td><td>381.5</td><td></td></tr><tr><td>Other Expense</td><td>137.8</td><td></td><td>131.7</td><td></td><td>122.9</td><td></td></tr><tr><td>Net Income</td><td>$ 331.2</td><td></td><td>$ 279.6</td><td></td><td>$ 246.8</td><td></td></tr><tr><td>ALLETE’s Equity in Net Income</td><td>$ 26.5</td><td></td><td>$ 23.1</td><td></td><td>$ 19.3</td><td></td></tr></table>
table
26.5
monetaryItemType
table: <entity> 26.5 </entity> <entity type> monetaryItemType </entity type> <context> ALLETE’s Equity in Net Income | $ 26.5 | $ 23.1 | $ 19.3 </context>
us-gaap:IncomeLossFromEquityMethodInvestments
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Income Statement Data</td><td></td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td><td>2022</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>Revenue</td><td>$ 911.3</td><td></td><td>$ 818.9</td><td></td><td>$ 751.2</td><td></td></tr><tr><td>Operating Expense</td><td>442.3</td><td></td><td>407.6</td><td></td><td>381.5</td><td></td></tr><tr><td>Other Expense</td><td>137.8</td><td></td><td>131.7</td><td></td><td>122.9</td><td></td></tr><tr><td>Net Income</td><td>$ 331.2</td><td></td><td>$ 279.6</td><td></td><td>$ 246.8</td><td></td></tr><tr><td>ALLETE’s Equity in Net Income</td><td>$ 26.5</td><td></td><td>$ 23.1</td><td></td><td>$ 19.3</td><td></td></tr></table>
table
23.1
monetaryItemType
table: <entity> 23.1 </entity> <entity type> monetaryItemType </entity type> <context> ALLETE’s Equity in Net Income | $ 26.5 | $ 23.1 | $ 19.3 </context>
us-gaap:IncomeLossFromEquityMethodInvestments
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Income Statement Data</td><td></td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td><td>2022</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>Revenue</td><td>$ 911.3</td><td></td><td>$ 818.9</td><td></td><td>$ 751.2</td><td></td></tr><tr><td>Operating Expense</td><td>442.3</td><td></td><td>407.6</td><td></td><td>381.5</td><td></td></tr><tr><td>Other Expense</td><td>137.8</td><td></td><td>131.7</td><td></td><td>122.9</td><td></td></tr><tr><td>Net Income</td><td>$ 331.2</td><td></td><td>$ 279.6</td><td></td><td>$ 246.8</td><td></td></tr><tr><td>ALLETE’s Equity in Net Income</td><td>$ 26.5</td><td></td><td>$ 23.1</td><td></td><td>$ 19.3</td><td></td></tr></table>
table
19.3
monetaryItemType
table: <entity> 19.3 </entity> <entity type> monetaryItemType </entity type> <context> ALLETE’s Equity in Net Income | $ 26.5 | $ 23.1 | $ 19.3 </context>
us-gaap:IncomeLossFromEquityMethodInvestments
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ALLETE’s Investment in Nobles 2</td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Equity Investment Balance as of December 31, 2023</td><td>$ 151.5</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Equity in Nobles 2 Earnings (a) Equity in Nobles 2 Earnings (a)</td><td>( 1.5 )</td><td></td><td></td></tr><tr><td>Distributed Nobles 2 Earnings</td><td>( 4.3 )</td><td></td><td></td></tr><tr><td>Equity Investment Balance as of December 31, 2024</td><td>$ 145.7</td><td></td><td></td></tr></table>
table
151.5
monetaryItemType
table: <entity> 151.5 </entity> <entity type> monetaryItemType </entity type> <context> Equity Investment Balance as of December 31, 2023 | $ 151.5 </context>
us-gaap:EquityMethodInvestments
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ALLETE’s Investment in Nobles 2</td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Equity Investment Balance as of December 31, 2023</td><td>$ 151.5</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Equity in Nobles 2 Earnings (a) Equity in Nobles 2 Earnings (a)</td><td>( 1.5 )</td><td></td><td></td></tr><tr><td>Distributed Nobles 2 Earnings</td><td>( 4.3 )</td><td></td><td></td></tr><tr><td>Equity Investment Balance as of December 31, 2024</td><td>$ 145.7</td><td></td><td></td></tr></table>
table
1.5
monetaryItemType
table: <entity> 1.5 </entity> <entity type> monetaryItemType </entity type> <context> None </context>
us-gaap:IncomeLossFromEquityMethodInvestments
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ALLETE’s Investment in Nobles 2</td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Equity Investment Balance as of December 31, 2023</td><td>$ 151.5</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Equity in Nobles 2 Earnings (a) Equity in Nobles 2 Earnings (a)</td><td>( 1.5 )</td><td></td><td></td></tr><tr><td>Distributed Nobles 2 Earnings</td><td>( 4.3 )</td><td></td><td></td></tr><tr><td>Equity Investment Balance as of December 31, 2024</td><td>$ 145.7</td><td></td><td></td></tr></table>
table
4.3
monetaryItemType
table: <entity> 4.3 </entity> <entity type> monetaryItemType </entity type> <context> None </context>
us-gaap:EquityMethodInvestmentDividendsOrDistributions
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ALLETE’s Investment in Nobles 2</td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Equity Investment Balance as of December 31, 2023</td><td>$ 151.5</td><td></td><td></td></tr><tr><td></td><td></td><td></td></tr><tr><td>Equity in Nobles 2 Earnings (a) Equity in Nobles 2 Earnings (a)</td><td>( 1.5 )</td><td></td><td></td></tr><tr><td>Distributed Nobles 2 Earnings</td><td>( 4.3 )</td><td></td><td></td></tr><tr><td>Equity Investment Balance as of December 31, 2024</td><td>$ 145.7</td><td></td><td></td></tr></table>
table
145.7
monetaryItemType
table: <entity> 145.7 </entity> <entity type> monetaryItemType </entity type> <context> Equity Investment Balance as of December 31, 2024 | $ 145.7 </context>
us-gaap:EquityMethodInvestments
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Fair Value as of December 31, 2024</td></tr><tr><td>Recurring Fair Value Measures</td><td>Level 1</td><td></td><td>Level 2</td><td></td><td>Level 3</td><td></td><td>Total</td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Investments (a) Investments (a)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Available-for-sale – Equity Securities</td><td>$ 8.6</td><td></td><td>—</td><td></td><td>—</td><td></td><td>$ 8.6</td></tr><tr><td>Available-for-sale – Corporate and Governmental Debt Securities (b) Available-for-sale – Corporate and Governmental Debt Securities (b)</td><td>—</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>6.8</td></tr><tr><td>Cash Equivalents</td><td>8.5</td><td></td><td>—</td><td></td><td>—</td><td></td><td>8.5</td></tr><tr><td>Total Fair Value of Assets</td><td>$ 17.1</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>$ 23.9</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Liabilities:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Deferred Compensation (c) Deferred Compensation (c)</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Total Fair Value of Liabilities</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>
table
8.6
monetaryItemType
table: <entity> 8.6 </entity> <entity type> monetaryItemType </entity type> <context> Available-for-sale – Equity Securities | $ 8.6 | — | — | $ 8.6 </context>
us-gaap:EquitySecuritiesFVNINoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Fair Value as of December 31, 2024</td></tr><tr><td>Recurring Fair Value Measures</td><td>Level 1</td><td></td><td>Level 2</td><td></td><td>Level 3</td><td></td><td>Total</td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Investments (a) Investments (a)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Available-for-sale – Equity Securities</td><td>$ 8.6</td><td></td><td>—</td><td></td><td>—</td><td></td><td>$ 8.6</td></tr><tr><td>Available-for-sale – Corporate and Governmental Debt Securities (b) Available-for-sale – Corporate and Governmental Debt Securities (b)</td><td>—</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>6.8</td></tr><tr><td>Cash Equivalents</td><td>8.5</td><td></td><td>—</td><td></td><td>—</td><td></td><td>8.5</td></tr><tr><td>Total Fair Value of Assets</td><td>$ 17.1</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>$ 23.9</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Liabilities:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Deferred Compensation (c) Deferred Compensation (c)</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Total Fair Value of Liabilities</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>
table
—
monetaryItemType
table: <entity> — </entity> <entity type> monetaryItemType </entity type> <context> Available-for-sale – Equity Securities | $ 8.6 | — | — | $ 8.6 </context>
us-gaap:EquitySecuritiesFVNINoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Fair Value as of December 31, 2024</td></tr><tr><td>Recurring Fair Value Measures</td><td>Level 1</td><td></td><td>Level 2</td><td></td><td>Level 3</td><td></td><td>Total</td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Investments (a) Investments (a)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Available-for-sale – Equity Securities</td><td>$ 8.6</td><td></td><td>—</td><td></td><td>—</td><td></td><td>$ 8.6</td></tr><tr><td>Available-for-sale – Corporate and Governmental Debt Securities (b) Available-for-sale – Corporate and Governmental Debt Securities (b)</td><td>—</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>6.8</td></tr><tr><td>Cash Equivalents</td><td>8.5</td><td></td><td>—</td><td></td><td>—</td><td></td><td>8.5</td></tr><tr><td>Total Fair Value of Assets</td><td>$ 17.1</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>$ 23.9</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Liabilities:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Deferred Compensation (c) Deferred Compensation (c)</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Total Fair Value of Liabilities</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>
table
—
monetaryItemType
table: <entity> — </entity> <entity type> monetaryItemType </entity type> <context> Available-for-sale – Equity Securities | $ 8.6 | — | — | $ 8.6 </context>
us-gaap:AvailableForSaleSecuritiesDebtSecuritiesNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Fair Value as of December 31, 2024</td></tr><tr><td>Recurring Fair Value Measures</td><td>Level 1</td><td></td><td>Level 2</td><td></td><td>Level 3</td><td></td><td>Total</td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Investments (a) Investments (a)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Available-for-sale – Equity Securities</td><td>$ 8.6</td><td></td><td>—</td><td></td><td>—</td><td></td><td>$ 8.6</td></tr><tr><td>Available-for-sale – Corporate and Governmental Debt Securities (b) Available-for-sale – Corporate and Governmental Debt Securities (b)</td><td>—</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>6.8</td></tr><tr><td>Cash Equivalents</td><td>8.5</td><td></td><td>—</td><td></td><td>—</td><td></td><td>8.5</td></tr><tr><td>Total Fair Value of Assets</td><td>$ 17.1</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>$ 23.9</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Liabilities:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Deferred Compensation (c) Deferred Compensation (c)</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Total Fair Value of Liabilities</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>
table
6.8
monetaryItemType
table: <entity> 6.8 </entity> <entity type> monetaryItemType </entity type> <context> Available-for-sale – Corporate and Governmental Debt Securities (b) Available-for-sale – Corporate and Governmental Debt Securities (b) | — | $ 6.8 | — | 6.8 </context>
us-gaap:AvailableForSaleSecuritiesDebtSecuritiesNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Fair Value as of December 31, 2024</td></tr><tr><td>Recurring Fair Value Measures</td><td>Level 1</td><td></td><td>Level 2</td><td></td><td>Level 3</td><td></td><td>Total</td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Investments (a) Investments (a)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Available-for-sale – Equity Securities</td><td>$ 8.6</td><td></td><td>—</td><td></td><td>—</td><td></td><td>$ 8.6</td></tr><tr><td>Available-for-sale – Corporate and Governmental Debt Securities (b) Available-for-sale – Corporate and Governmental Debt Securities (b)</td><td>—</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>6.8</td></tr><tr><td>Cash Equivalents</td><td>8.5</td><td></td><td>—</td><td></td><td>—</td><td></td><td>8.5</td></tr><tr><td>Total Fair Value of Assets</td><td>$ 17.1</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>$ 23.9</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Liabilities:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Deferred Compensation (c) Deferred Compensation (c)</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Total Fair Value of Liabilities</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>
table
8.5
monetaryItemType
table: <entity> 8.5 </entity> <entity type> monetaryItemType </entity type> <context> Cash Equivalents | 8.5 | — | — | 8.5 </context>
us-gaap:OtherRestrictedAssetsNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Fair Value as of December 31, 2024</td></tr><tr><td>Recurring Fair Value Measures</td><td>Level 1</td><td></td><td>Level 2</td><td></td><td>Level 3</td><td></td><td>Total</td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Investments (a) Investments (a)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Available-for-sale – Equity Securities</td><td>$ 8.6</td><td></td><td>—</td><td></td><td>—</td><td></td><td>$ 8.6</td></tr><tr><td>Available-for-sale – Corporate and Governmental Debt Securities (b) Available-for-sale – Corporate and Governmental Debt Securities (b)</td><td>—</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>6.8</td></tr><tr><td>Cash Equivalents</td><td>8.5</td><td></td><td>—</td><td></td><td>—</td><td></td><td>8.5</td></tr><tr><td>Total Fair Value of Assets</td><td>$ 17.1</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>$ 23.9</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Liabilities:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Deferred Compensation (c) Deferred Compensation (c)</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Total Fair Value of Liabilities</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>
table
—
monetaryItemType
table: <entity> — </entity> <entity type> monetaryItemType </entity type> <context> Available-for-sale – Equity Securities | $ 8.6 | — | — | $ 8.6 </context>
us-gaap:OtherRestrictedAssetsNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Fair Value as of December 31, 2024</td></tr><tr><td>Recurring Fair Value Measures</td><td>Level 1</td><td></td><td>Level 2</td><td></td><td>Level 3</td><td></td><td>Total</td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Investments (a) Investments (a)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Available-for-sale – Equity Securities</td><td>$ 8.6</td><td></td><td>—</td><td></td><td>—</td><td></td><td>$ 8.6</td></tr><tr><td>Available-for-sale – Corporate and Governmental Debt Securities (b) Available-for-sale – Corporate and Governmental Debt Securities (b)</td><td>—</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>6.8</td></tr><tr><td>Cash Equivalents</td><td>8.5</td><td></td><td>—</td><td></td><td>—</td><td></td><td>8.5</td></tr><tr><td>Total Fair Value of Assets</td><td>$ 17.1</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>$ 23.9</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Liabilities:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Deferred Compensation (c) Deferred Compensation (c)</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Total Fair Value of Liabilities</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>
table
17.1
monetaryItemType
table: <entity> 17.1 </entity> <entity type> monetaryItemType </entity type> <context> Total Fair Value of Assets | $ 17.1 | $ 6.8 | — | $ 23.9 </context>
us-gaap:AssetsFairValueDisclosure
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Fair Value as of December 31, 2024</td></tr><tr><td>Recurring Fair Value Measures</td><td>Level 1</td><td></td><td>Level 2</td><td></td><td>Level 3</td><td></td><td>Total</td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Investments (a) Investments (a)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Available-for-sale – Equity Securities</td><td>$ 8.6</td><td></td><td>—</td><td></td><td>—</td><td></td><td>$ 8.6</td></tr><tr><td>Available-for-sale – Corporate and Governmental Debt Securities (b) Available-for-sale – Corporate and Governmental Debt Securities (b)</td><td>—</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>6.8</td></tr><tr><td>Cash Equivalents</td><td>8.5</td><td></td><td>—</td><td></td><td>—</td><td></td><td>8.5</td></tr><tr><td>Total Fair Value of Assets</td><td>$ 17.1</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>$ 23.9</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Liabilities:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Deferred Compensation (c) Deferred Compensation (c)</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Total Fair Value of Liabilities</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>
table
6.8
monetaryItemType
table: <entity> 6.8 </entity> <entity type> monetaryItemType </entity type> <context> Available-for-sale – Corporate and Governmental Debt Securities (b) Available-for-sale – Corporate and Governmental Debt Securities (b) | — | $ 6.8 | — | 6.8 </context>
us-gaap:AssetsFairValueDisclosure
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Fair Value as of December 31, 2024</td></tr><tr><td>Recurring Fair Value Measures</td><td>Level 1</td><td></td><td>Level 2</td><td></td><td>Level 3</td><td></td><td>Total</td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Investments (a) Investments (a)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Available-for-sale – Equity Securities</td><td>$ 8.6</td><td></td><td>—</td><td></td><td>—</td><td></td><td>$ 8.6</td></tr><tr><td>Available-for-sale – Corporate and Governmental Debt Securities (b) Available-for-sale – Corporate and Governmental Debt Securities (b)</td><td>—</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>6.8</td></tr><tr><td>Cash Equivalents</td><td>8.5</td><td></td><td>—</td><td></td><td>—</td><td></td><td>8.5</td></tr><tr><td>Total Fair Value of Assets</td><td>$ 17.1</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>$ 23.9</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Liabilities:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Deferred Compensation (c) Deferred Compensation (c)</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Total Fair Value of Liabilities</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>
table
—
monetaryItemType
table: <entity> — </entity> <entity type> monetaryItemType </entity type> <context> Available-for-sale – Equity Securities | $ 8.6 | — | — | $ 8.6 </context>
us-gaap:AssetsFairValueDisclosure
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Fair Value as of December 31, 2024</td></tr><tr><td>Recurring Fair Value Measures</td><td>Level 1</td><td></td><td>Level 2</td><td></td><td>Level 3</td><td></td><td>Total</td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Investments (a) Investments (a)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Available-for-sale – Equity Securities</td><td>$ 8.6</td><td></td><td>—</td><td></td><td>—</td><td></td><td>$ 8.6</td></tr><tr><td>Available-for-sale – Corporate and Governmental Debt Securities (b) Available-for-sale – Corporate and Governmental Debt Securities (b)</td><td>—</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>6.8</td></tr><tr><td>Cash Equivalents</td><td>8.5</td><td></td><td>—</td><td></td><td>—</td><td></td><td>8.5</td></tr><tr><td>Total Fair Value of Assets</td><td>$ 17.1</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>$ 23.9</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Liabilities:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Deferred Compensation (c) Deferred Compensation (c)</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Total Fair Value of Liabilities</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>
table
23.9
monetaryItemType
table: <entity> 23.9 </entity> <entity type> monetaryItemType </entity type> <context> Total Fair Value of Assets | $ 17.1 | $ 6.8 | — | $ 23.9 </context>
us-gaap:AssetsFairValueDisclosure
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Fair Value as of December 31, 2024</td></tr><tr><td>Recurring Fair Value Measures</td><td>Level 1</td><td></td><td>Level 2</td><td></td><td>Level 3</td><td></td><td>Total</td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Investments (a) Investments (a)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Available-for-sale – Equity Securities</td><td>$ 8.6</td><td></td><td>—</td><td></td><td>—</td><td></td><td>$ 8.6</td></tr><tr><td>Available-for-sale – Corporate and Governmental Debt Securities (b) Available-for-sale – Corporate and Governmental Debt Securities (b)</td><td>—</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>6.8</td></tr><tr><td>Cash Equivalents</td><td>8.5</td><td></td><td>—</td><td></td><td>—</td><td></td><td>8.5</td></tr><tr><td>Total Fair Value of Assets</td><td>$ 17.1</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>$ 23.9</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Liabilities:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Deferred Compensation (c) Deferred Compensation (c)</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Total Fair Value of Liabilities</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>
table
—
monetaryItemType
table: <entity> — </entity> <entity type> monetaryItemType </entity type> <context> Available-for-sale – Equity Securities | $ 8.6 | — | — | $ 8.6 </context>
us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Fair Value as of December 31, 2024</td></tr><tr><td>Recurring Fair Value Measures</td><td>Level 1</td><td></td><td>Level 2</td><td></td><td>Level 3</td><td></td><td>Total</td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Investments (a) Investments (a)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Available-for-sale – Equity Securities</td><td>$ 8.6</td><td></td><td>—</td><td></td><td>—</td><td></td><td>$ 8.6</td></tr><tr><td>Available-for-sale – Corporate and Governmental Debt Securities (b) Available-for-sale – Corporate and Governmental Debt Securities (b)</td><td>—</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>6.8</td></tr><tr><td>Cash Equivalents</td><td>8.5</td><td></td><td>—</td><td></td><td>—</td><td></td><td>8.5</td></tr><tr><td>Total Fair Value of Assets</td><td>$ 17.1</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>$ 23.9</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Liabilities:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Deferred Compensation (c) Deferred Compensation (c)</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Total Fair Value of Liabilities</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>
table
21.1
monetaryItemType
table: <entity> 21.1 </entity> <entity type> monetaryItemType </entity type> <context> Deferred Compensation (c) Deferred Compensation (c) | — | $ 21.1 | — | $ 21.1 </context>
us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Fair Value as of December 31, 2024</td></tr><tr><td>Recurring Fair Value Measures</td><td>Level 1</td><td></td><td>Level 2</td><td></td><td>Level 3</td><td></td><td>Total</td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Investments (a) Investments (a)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Available-for-sale – Equity Securities</td><td>$ 8.6</td><td></td><td>—</td><td></td><td>—</td><td></td><td>$ 8.6</td></tr><tr><td>Available-for-sale – Corporate and Governmental Debt Securities (b) Available-for-sale – Corporate and Governmental Debt Securities (b)</td><td>—</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>6.8</td></tr><tr><td>Cash Equivalents</td><td>8.5</td><td></td><td>—</td><td></td><td>—</td><td></td><td>8.5</td></tr><tr><td>Total Fair Value of Assets</td><td>$ 17.1</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>$ 23.9</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Liabilities:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Deferred Compensation (c) Deferred Compensation (c)</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Total Fair Value of Liabilities</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>
table
—
monetaryItemType
table: <entity> — </entity> <entity type> monetaryItemType </entity type> <context> Available-for-sale – Equity Securities | $ 8.6 | — | — | $ 8.6 </context>
us-gaap:LiabilitiesFairValueDisclosure
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Fair Value as of December 31, 2024</td></tr><tr><td>Recurring Fair Value Measures</td><td>Level 1</td><td></td><td>Level 2</td><td></td><td>Level 3</td><td></td><td>Total</td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Investments (a) Investments (a)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Available-for-sale – Equity Securities</td><td>$ 8.6</td><td></td><td>—</td><td></td><td>—</td><td></td><td>$ 8.6</td></tr><tr><td>Available-for-sale – Corporate and Governmental Debt Securities (b) Available-for-sale – Corporate and Governmental Debt Securities (b)</td><td>—</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>6.8</td></tr><tr><td>Cash Equivalents</td><td>8.5</td><td></td><td>—</td><td></td><td>—</td><td></td><td>8.5</td></tr><tr><td>Total Fair Value of Assets</td><td>$ 17.1</td><td></td><td>$ 6.8</td><td></td><td>—</td><td></td><td>$ 23.9</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Liabilities:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Deferred Compensation (c) Deferred Compensation (c)</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Total Fair Value of Liabilities</td><td>—</td><td></td><td>$ 21.1</td><td></td><td>—</td><td></td><td>$ 21.1</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>
table
21.1
monetaryItemType
table: <entity> 21.1 </entity> <entity type> monetaryItemType </entity type> <context> Deferred Compensation (c) Deferred Compensation (c) | — | $ 21.1 | — | $ 21.1 </context>
us-gaap:LiabilitiesFairValueDisclosure
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Fair Value as of December 31, 2023</td></tr><tr><td>Recurring Fair Value Measures</td><td>Level 1</td><td></td><td>Level 2</td><td></td><td>Level 3</td><td></td><td>Total</td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Investments (a) Investments (a)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Available-for-sale – Equity Securities</td><td>$ 8.7</td><td></td><td>—</td><td></td><td>—</td><td></td><td>$ 8.7</td></tr><tr><td>Available-for-sale – Corporate and Governmental Debt Securities</td><td>—</td><td></td><td>$ 6.0</td><td></td><td>—</td><td></td><td>6.0</td></tr><tr><td>Cash Equivalents</td><td>5.8</td><td></td><td>—</td><td></td><td>—</td><td></td><td>5.8</td></tr><tr><td>Total Fair Value of Assets</td><td>$ 14.5</td><td></td><td>$ 6.0</td><td></td><td>—</td><td></td><td>$ 20.5</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Liabilities: (b) Liabilities: (b)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Deferred Compensation</td><td>—</td><td></td><td>$ 16.5</td><td></td><td>—</td><td></td><td>$ 16.5</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Total Fair Value of Liabilities</td><td>—</td><td></td><td>$ 16.5</td><td></td><td>—</td><td></td><td>$ 16.5</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>
table
8.7
monetaryItemType
table: <entity> 8.7 </entity> <entity type> monetaryItemType </entity type> <context> Available-for-sale – Equity Securities | $ 8.7 | — | — | $ 8.7 </context>
us-gaap:EquitySecuritiesFVNINoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Fair Value as of December 31, 2023</td></tr><tr><td>Recurring Fair Value Measures</td><td>Level 1</td><td></td><td>Level 2</td><td></td><td>Level 3</td><td></td><td>Total</td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Investments (a) Investments (a)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Available-for-sale – Equity Securities</td><td>$ 8.7</td><td></td><td>—</td><td></td><td>—</td><td></td><td>$ 8.7</td></tr><tr><td>Available-for-sale – Corporate and Governmental Debt Securities</td><td>—</td><td></td><td>$ 6.0</td><td></td><td>—</td><td></td><td>6.0</td></tr><tr><td>Cash Equivalents</td><td>5.8</td><td></td><td>—</td><td></td><td>—</td><td></td><td>5.8</td></tr><tr><td>Total Fair Value of Assets</td><td>$ 14.5</td><td></td><td>$ 6.0</td><td></td><td>—</td><td></td><td>$ 20.5</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Liabilities: (b) Liabilities: (b)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Deferred Compensation</td><td>—</td><td></td><td>$ 16.5</td><td></td><td>—</td><td></td><td>$ 16.5</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Total Fair Value of Liabilities</td><td>—</td><td></td><td>$ 16.5</td><td></td><td>—</td><td></td><td>$ 16.5</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>
table
—
monetaryItemType
table: <entity> — </entity> <entity type> monetaryItemType </entity type> <context> Available-for-sale – Equity Securities | $ 8.7 | — | — | $ 8.7 </context>
us-gaap:EquitySecuritiesFVNINoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Fair Value as of December 31, 2023</td></tr><tr><td>Recurring Fair Value Measures</td><td>Level 1</td><td></td><td>Level 2</td><td></td><td>Level 3</td><td></td><td>Total</td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Investments (a) Investments (a)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Available-for-sale – Equity Securities</td><td>$ 8.7</td><td></td><td>—</td><td></td><td>—</td><td></td><td>$ 8.7</td></tr><tr><td>Available-for-sale – Corporate and Governmental Debt Securities</td><td>—</td><td></td><td>$ 6.0</td><td></td><td>—</td><td></td><td>6.0</td></tr><tr><td>Cash Equivalents</td><td>5.8</td><td></td><td>—</td><td></td><td>—</td><td></td><td>5.8</td></tr><tr><td>Total Fair Value of Assets</td><td>$ 14.5</td><td></td><td>$ 6.0</td><td></td><td>—</td><td></td><td>$ 20.5</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Liabilities: (b) Liabilities: (b)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Deferred Compensation</td><td>—</td><td></td><td>$ 16.5</td><td></td><td>—</td><td></td><td>$ 16.5</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Total Fair Value of Liabilities</td><td>—</td><td></td><td>$ 16.5</td><td></td><td>—</td><td></td><td>$ 16.5</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>
table
—
monetaryItemType
table: <entity> — </entity> <entity type> monetaryItemType </entity type> <context> Available-for-sale – Equity Securities | $ 8.7 | — | — | $ 8.7 </context>
us-gaap:AvailableForSaleSecuritiesDebtSecuritiesNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Fair Value as of December 31, 2023</td></tr><tr><td>Recurring Fair Value Measures</td><td>Level 1</td><td></td><td>Level 2</td><td></td><td>Level 3</td><td></td><td>Total</td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Investments (a) Investments (a)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Available-for-sale – Equity Securities</td><td>$ 8.7</td><td></td><td>—</td><td></td><td>—</td><td></td><td>$ 8.7</td></tr><tr><td>Available-for-sale – Corporate and Governmental Debt Securities</td><td>—</td><td></td><td>$ 6.0</td><td></td><td>—</td><td></td><td>6.0</td></tr><tr><td>Cash Equivalents</td><td>5.8</td><td></td><td>—</td><td></td><td>—</td><td></td><td>5.8</td></tr><tr><td>Total Fair Value of Assets</td><td>$ 14.5</td><td></td><td>$ 6.0</td><td></td><td>—</td><td></td><td>$ 20.5</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Liabilities: (b) Liabilities: (b)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Deferred Compensation</td><td>—</td><td></td><td>$ 16.5</td><td></td><td>—</td><td></td><td>$ 16.5</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Total Fair Value of Liabilities</td><td>—</td><td></td><td>$ 16.5</td><td></td><td>—</td><td></td><td>$ 16.5</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>
table
6.0
monetaryItemType
table: <entity> 6.0 </entity> <entity type> monetaryItemType </entity type> <context> Available-for-sale – Corporate and Governmental Debt Securities | — | $ 6.0 | — | 6.0 </context>
us-gaap:AvailableForSaleSecuritiesDebtSecuritiesNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>Fair Value as of December 31, 2023</td></tr><tr><td>Recurring Fair Value Measures</td><td>Level 1</td><td></td><td>Level 2</td><td></td><td>Level 3</td><td></td><td>Total</td></tr><tr><td>Millions</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Investments (a) Investments (a)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Available-for-sale – Equity Securities</td><td>$ 8.7</td><td></td><td>—</td><td></td><td>—</td><td></td><td>$ 8.7</td></tr><tr><td>Available-for-sale – Corporate and Governmental Debt Securities</td><td>—</td><td></td><td>$ 6.0</td><td></td><td>—</td><td></td><td>6.0</td></tr><tr><td>Cash Equivalents</td><td>5.8</td><td></td><td>—</td><td></td><td>—</td><td></td><td>5.8</td></tr><tr><td>Total Fair Value of Assets</td><td>$ 14.5</td><td></td><td>$ 6.0</td><td></td><td>—</td><td></td><td>$ 20.5</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Liabilities: (b) Liabilities: (b)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Deferred Compensation</td><td>—</td><td></td><td>$ 16.5</td><td></td><td>—</td><td></td><td>$ 16.5</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Total Fair Value of Liabilities</td><td>—</td><td></td><td>$ 16.5</td><td></td><td>—</td><td></td><td>$ 16.5</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>
table
5.8
monetaryItemType
table: <entity> 5.8 </entity> <entity type> monetaryItemType </entity type> <context> Cash Equivalents | 5.8 | — | — | 5.8 </context>
us-gaap:OtherRestrictedAssetsNoncurrent