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<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></tr><tr><td>Cash, Cash Equivalents and Restricted Cash</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>202...
table
5.1
monetaryItemType
table: <entity> 5.1 </entity> <entity type> monetaryItemType </entity type> <context> Restricted Cash included in Prepayments and Other | 19.9 | 5.1 | 1.5 </context>
us-gaap:RestrictedCashCurrent
<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></tr><tr><td>Cash, Cash Equivalents and Restricted Cash</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>202...
table
1.5
monetaryItemType
table: <entity> 1.5 </entity> <entity type> monetaryItemType </entity type> <context> Restricted Cash included in Prepayments and Other | 19.9 | 5.1 | 1.5 </context>
us-gaap:RestrictedCashCurrent
<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></tr><tr><td>Cash, Cash Equivalents and Restricted Cash</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>202...
table
2.5
monetaryItemType
table: <entity> 2.5 </entity> <entity type> monetaryItemType </entity type> <context> Restricted Cash included in Other Non-Current Assets | 2.5 | 2.4 | 2.3 </context>
us-gaap:RestrictedCashNoncurrent
<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></tr><tr><td>Cash, Cash Equivalents and Restricted Cash</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>202...
table
2.4
monetaryItemType
table: <entity> 2.4 </entity> <entity type> monetaryItemType </entity type> <context> Restricted Cash included in Other Non-Current Assets | 2.5 | 2.4 | 2.3 </context>
us-gaap:RestrictedCashNoncurrent
<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></tr><tr><td>Cash, Cash Equivalents and Restricted Cash</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>202...
table
2.3
monetaryItemType
table: <entity> 2.3 </entity> <entity type> monetaryItemType </entity type> <context> Restricted Cash included in Other Non-Current Assets | 2.5 | 2.4 | 2.3 </context>
us-gaap:RestrictedCashNoncurrent
<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></tr><tr><td>Cash, Cash Equivalents and Restricted Cash</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>202...
table
55.2
monetaryItemType
table: <entity> 55.2 </entity> <entity type> monetaryItemType </entity type> <context> Cash, Cash Equivalents and Restricted Cash on the Consolidated Statement of Cash Flows | $ 55.2 | $ 79.4 | $ 40.2 </context>
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
<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></tr><tr><td>Cash, Cash Equivalents and Restricted Cash</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>202...
table
79.4
monetaryItemType
table: <entity> 79.4 </entity> <entity type> monetaryItemType </entity type> <context> Cash, Cash Equivalents and Restricted Cash on the Consolidated Statement of Cash Flows | $ 55.2 | $ 79.4 | $ 40.2 </context>
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
<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></tr><tr><td>Cash, Cash Equivalents and Restricted Cash</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>202...
table
40.2
monetaryItemType
table: <entity> 40.2 </entity> <entity type> monetaryItemType </entity type> <context> Cash, Cash Equivalents and Restricted Cash on the Consolidated Statement of Cash Flows | $ 55.2 | $ 79.4 | $ 40.2 </context>
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
<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></tr><tr><td>Consolidated Statement of Cash Flows</td><td></td><td></td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td><td>2022</td><td></td></tr><tr><td>M...
table
75.1
monetaryItemType
table: <entity> 75.1 </entity> <entity type> monetaryItemType </entity type> <context> Cash Paid During the Period for Interest – Net of Amounts Capitalized | $ 75.1 | $ 80.5 | $ 72.8 </context>
us-gaap:InterestPaidNet
<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></tr><tr><td>Consolidated Statement of Cash Flows</td><td></td><td></td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td><td>2022</td><td></td></tr><tr><td>M...
table
80.5
monetaryItemType
table: <entity> 80.5 </entity> <entity type> monetaryItemType </entity type> <context> Cash Paid During the Period for Interest – Net of Amounts Capitalized | $ 75.1 | $ 80.5 | $ 72.8 </context>
us-gaap:InterestPaidNet
<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></tr><tr><td>Consolidated Statement of Cash Flows</td><td></td><td></td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td><td>2022</td><td></td></tr><tr><td>M...
table
72.8
monetaryItemType
table: <entity> 72.8 </entity> <entity type> monetaryItemType </entity type> <context> Cash Paid During the Period for Interest – Net of Amounts Capitalized | $ 75.1 | $ 80.5 | $ 72.8 </context>
us-gaap:InterestPaidNet
<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></tr><tr><td>Consolidated Statement of Cash Flows</td><td></td><td></td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td><td>2022</td><td></td></tr><tr><td>M...
table
19.1
monetaryItemType
table: <entity> 19.1 </entity> <entity type> monetaryItemType </entity type> <context> Cash Paid for Income Taxes | $ 19.1 | $ 19.5 | $ 6.0 </context>
us-gaap:IncomeTaxesPaidNet
<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></tr><tr><td>Consolidated Statement of Cash Flows</td><td></td><td></td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td><td>2022</td><td></td></tr><tr><td>M...
table
19.5
monetaryItemType
table: <entity> 19.5 </entity> <entity type> monetaryItemType </entity type> <context> Cash Paid for Income Taxes | $ 19.1 | $ 19.5 | $ 6.0 </context>
us-gaap:IncomeTaxesPaidNet
<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></tr><tr><td>Consolidated Statement of Cash Flows</td><td></td><td></td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td><td>2022</td><td></td></tr><tr><td>M...
table
6.0
monetaryItemType
table: <entity> 6.0 </entity> <entity type> monetaryItemType </entity type> <context> Cash Paid for Income Taxes | $ 19.1 | $ 19.5 | $ 6.0 </context>
us-gaap:IncomeTaxesPaidNet
<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></tr><tr><td>Consolidated Statement of Cash Flows</td><td></td><td></td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td><td>2022</td><td></td></tr><tr><td>M...
table
55.0
monetaryItemType
table: <entity> 55.0 </entity> <entity type> monetaryItemType </entity type> <context> Capitalized Asset Retirement Costs (b) Capitalized Asset Retirement Costs (b) | $ 55.0 | $ 5.8 | $ 11.8 </context>
us-gaap:IncreaseDecreaseInAssetRetirementObligations
<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></tr><tr><td>Consolidated Statement of Cash Flows</td><td></td><td></td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td><td>2022</td><td></td></tr><tr><td>M...
table
5.8
monetaryItemType
table: <entity> 5.8 </entity> <entity type> monetaryItemType </entity type> <context> Capitalized Asset Retirement Costs (b) Capitalized Asset Retirement Costs (b) | $ 55.0 | $ 5.8 | $ 11.8 </context>
us-gaap:IncreaseDecreaseInAssetRetirementObligations
<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></tr><tr><td>Consolidated Statement of Cash Flows</td><td></td><td></td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td><td>2022</td><td></td></tr><tr><td>M...
table
11.8
monetaryItemType
table: <entity> 11.8 </entity> <entity type> monetaryItemType </entity type> <context> Capitalized Asset Retirement Costs (b) Capitalized Asset Retirement Costs (b) | $ 55.0 | $ 5.8 | $ 11.8 </context>
us-gaap:IncreaseDecreaseInAssetRetirementObligations
<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></tr><tr><td>Consolidated Statement of Cash Flows</td><td></td><td></td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td><td>2022</td><td></td></tr><tr><td>M...
table
5.0
monetaryItemType
table: <entity> 5.0 </entity> <entity type> monetaryItemType </entity type> <context> AFUDC–Equity | $ 5.0 | $ 3.6 | $ 2.7 </context>
us-gaap:IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction
<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></tr><tr><td>Consolidated Statement of Cash Flows</td><td></td><td></td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td><td>2022</td><td></td></tr><tr><td>M...
table
3.6
monetaryItemType
table: <entity> 3.6 </entity> <entity type> monetaryItemType </entity type> <context> AFUDC–Equity | $ 5.0 | $ 3.6 | $ 2.7 </context>
us-gaap:IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction
<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></tr><tr><td>Consolidated Statement of Cash Flows</td><td></td><td></td><td></td><td></td></tr><tr><td>Year Ended December 31</td><td>2024</td><td>2023</td><td>2022</td><td></td></tr><tr><td>M...
table
2.7
monetaryItemType
table: <entity> 2.7 </entity> <entity type> monetaryItemType </entity type> <context> AFUDC–Equity | $ 5.0 | $ 3.6 | $ 2.7 </context>
us-gaap:IncreaseDecreaseInAllowanceForEquityFundsUsedDuringConstruction
<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>Accounts Receivable</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>T...
table
115.9
monetaryItemType
table: <entity> 115.9 </entity> <entity type> monetaryItemType </entity type> <context> Billed | $ 115.9 | $ 106.8 </context>
us-gaap:AccountsReceivableGrossCurrent
<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>Accounts Receivable</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>T...
table
106.8
monetaryItemType
table: <entity> 106.8 </entity> <entity type> monetaryItemType </entity type> <context> Billed | $ 115.9 | $ 106.8 </context>
us-gaap:AccountsReceivableGrossCurrent
<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>Accounts Receivable</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>T...
table
27.2
monetaryItemType
table: <entity> 27.2 </entity> <entity type> monetaryItemType </entity type> <context> Unbilled | 27.2 | 23.8 </context>
us-gaap:UnbilledReceivablesCurrent
<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>Accounts Receivable</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>T...
table
23.8
monetaryItemType
table: <entity> 23.8 </entity> <entity type> monetaryItemType </entity type> <context> Unbilled | 27.2 | 23.8 </context>
us-gaap:UnbilledReceivablesCurrent
<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>Accounts Receivable</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>T...
table
1.7
monetaryItemType
table: <entity> 1.7 </entity> <entity type> monetaryItemType </entity type> <context> Less: Allowance for Doubtful Accounts | 1.7 | 1.6 </context>
us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent
<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>Accounts Receivable</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>T...
table
1.6
monetaryItemType
table: <entity> 1.6 </entity> <entity type> monetaryItemType </entity type> <context> Less: Allowance for Doubtful Accounts | 1.7 | 1.6 </context>
us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent
<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>Accounts Receivable</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>T...
table
141.4
monetaryItemType
table: <entity> 141.4 </entity> <entity type> monetaryItemType </entity type> <context> Total Trade Accounts Receivable | 141.4 | 129.0 </context>
us-gaap:AccountsReceivableNetCurrent
<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>Accounts Receivable</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>T...
table
129.0
monetaryItemType
table: <entity> 129.0 </entity> <entity type> monetaryItemType </entity type> <context> Total Trade Accounts Receivable | 141.4 | 129.0 </context>
us-gaap:AccountsReceivableNetCurrent
<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>Accounts Receivable</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>T...
table
6.7
monetaryItemType
table: <entity> 6.7 </entity> <entity type> monetaryItemType </entity type> <context> Income Taxes Receivable | 6.7 | 8.2 </context>
us-gaap:NontradeReceivablesCurrent
<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>Accounts Receivable</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>T...
table
8.2
monetaryItemType
table: <entity> 8.2 </entity> <entity type> monetaryItemType </entity type> <context> Income Taxes Receivable | 6.7 | 8.2 </context>
us-gaap:NontradeReceivablesCurrent
<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>Accounts Receivable</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>T...
table
148.1
monetaryItemType
table: <entity> 148.1 </entity> <entity type> monetaryItemType </entity type> <context> Total Accounts Receivable | $ 148.1 | $ 137.2 </context>
us-gaap:AccountsAndOtherReceivablesNetCurrent
<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>Accounts Receivable</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>T...
table
137.2
monetaryItemType
table: <entity> 137.2 </entity> <entity type> monetaryItemType </entity type> <context> Total Accounts Receivable | $ 148.1 | $ 137.2 </context>
us-gaap:AccountsAndOtherReceivablesNetCurrent
<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>Inventories – Net</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>Fue...
table
22.5
monetaryItemType
table: <entity> 22.5 </entity> <entity type> monetaryItemType </entity type> <context> Fuel (a) Fuel (a) | $ 22.5 | $ 27.2 </context>
us-gaap:EnergyRelatedInventoryCoal
<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>Inventories – Net</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>Fue...
table
27.2
monetaryItemType
table: <entity> 27.2 </entity> <entity type> monetaryItemType </entity type> <context> Fuel (a) Fuel (a) | $ 22.5 | $ 27.2 </context>
us-gaap:EnergyRelatedInventoryCoal
<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>Inventories – Net</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>Fue...
table
107.6
monetaryItemType
table: <entity> 107.6 </entity> <entity type> monetaryItemType </entity type> <context> Materials and Supplies | 107.6 | 115.7 </context>
us-gaap:InventorySuppliesNetOfReserves
<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>Inventories – Net</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>Fue...
table
115.7
monetaryItemType
table: <entity> 115.7 </entity> <entity type> monetaryItemType </entity type> <context> Materials and Supplies | 107.6 | 115.7 </context>
us-gaap:InventorySuppliesNetOfReserves
<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>Inventories – Net</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>Fue...
table
24.5
monetaryItemType
table: <entity> 24.5 </entity> <entity type> monetaryItemType </entity type> <context> Renewable Energy Facilities Under Development (b) Renewable Energy Facilities Under Development (b) | 24.5 | 32.5 </context>
us-gaap:OtherInventory
<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>Inventories – Net</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>Fue...
table
32.5
monetaryItemType
table: <entity> 32.5 </entity> <entity type> monetaryItemType </entity type> <context> Renewable Energy Facilities Under Development (b) Renewable Energy Facilities Under Development (b) | 24.5 | 32.5 </context>
us-gaap:OtherInventory
<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>Inventories – Net</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>Fue...
table
154.6
monetaryItemType
table: <entity> 154.6 </entity> <entity type> monetaryItemType </entity type> <context> Total Inventories – Net | $ 154.6 | $ 175.4 </context>
us-gaap:InventoryNet
<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>Inventories – Net</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr><td>Fue...
table
175.4
monetaryItemType
table: <entity> 175.4 </entity> <entity type> monetaryItemType </entity type> <context> Total Inventories – Net | $ 154.6 | $ 175.4 </context>
us-gaap:InventoryNet
<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>Other Non-Current Assets</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr>...
table
15.9
monetaryItemType
table: <entity> 15.9 </entity> <entity type> monetaryItemType </entity type> <context> Contract Assets (a) Contract Assets (a) | $ 15.9 | $ 18.5 </context>
us-gaap:ContractWithCustomerAssetNetNoncurrent
<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>Other Non-Current Assets</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr>...
table
18.5
monetaryItemType
table: <entity> 18.5 </entity> <entity type> monetaryItemType </entity type> <context> Contract Assets (a) Contract Assets (a) | $ 15.9 | $ 18.5 </context>
us-gaap:ContractWithCustomerAssetNetNoncurrent
<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>Other Non-Current Assets</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr>...
table
10.3
monetaryItemType
table: <entity> 10.3 </entity> <entity type> monetaryItemType </entity type> <context> ALLETE Properties | 10.3 | 10.8 </context>
us-gaap:RealEstateInvestments
<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>Other Non-Current Assets</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr>...
table
10.8
monetaryItemType
table: <entity> 10.8 </entity> <entity type> monetaryItemType </entity type> <context> ALLETE Properties | 10.3 | 10.8 </context>
us-gaap:RealEstateInvestments
<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>Other Non-Current Assets</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr>...
table
2.5
monetaryItemType
table: <entity> 2.5 </entity> <entity type> monetaryItemType </entity type> <context> Restricted Cash | 2.5 | 2.4 </context>
us-gaap:RestrictedCashNoncurrent
<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>Other Non-Current Assets</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr>...
table
2.4
monetaryItemType
table: <entity> 2.4 </entity> <entity type> monetaryItemType </entity type> <context> Restricted Cash | 2.5 | 2.4 </context>
us-gaap:RestrictedCashNoncurrent
<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>Other Non-Current Assets</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr>...
table
134.2
monetaryItemType
table: <entity> 134.2 </entity> <entity type> monetaryItemType </entity type> <context> Other | 134.2 | 124.9 </context>
us-gaap:OtherAssetsMiscellaneousNoncurrent
<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>Other Non-Current Assets</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr>...
table
124.9
monetaryItemType
table: <entity> 124.9 </entity> <entity type> monetaryItemType </entity type> <context> Other | 134.2 | 124.9 </context>
us-gaap:OtherAssetsMiscellaneousNoncurrent
<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>Other Non-Current Assets</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr>...
table
270.5
monetaryItemType
table: <entity> 270.5 </entity> <entity type> monetaryItemType </entity type> <context> Total Other Non-Current Assets | $ 270.5 | $ 262.9 </context>
us-gaap:OtherAssetsNoncurrent
<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>Other Non-Current Assets</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr>...
table
262.9
monetaryItemType
table: <entity> 262.9 </entity> <entity type> monetaryItemType </entity type> <context> Total Other Non-Current Assets | $ 270.5 | $ 262.9 </context>
us-gaap:OtherAssetsNoncurrent
<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>Other Current Liabilities</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr...
table
7.8
monetaryItemType
table: <entity> 7.8 </entity> <entity type> monetaryItemType </entity type> <context> Customer Deposits | $ 7.8 | $ 7.4 </context>
us-gaap:ContractWithCustomerLiabilityCurrent
<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>Other Current Liabilities</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr...
table
7.4
monetaryItemType
table: <entity> 7.4 </entity> <entity type> monetaryItemType </entity type> <context> Customer Deposits | $ 7.8 | $ 7.4 </context>
us-gaap:ContractWithCustomerLiabilityCurrent
<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>Other Current Liabilities</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr...
table
81.1
monetaryItemType
table: <entity> 81.1 </entity> <entity type> monetaryItemType </entity type> <context> Other | 81.1 | 77.7 </context>
us-gaap:OtherAccruedLiabilitiesCurrent
<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>Other Current Liabilities</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr...
table
77.7
monetaryItemType
table: <entity> 77.7 </entity> <entity type> monetaryItemType </entity type> <context> Other | 81.1 | 77.7 </context>
us-gaap:OtherAccruedLiabilitiesCurrent
<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>Other Current Liabilities</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr...
table
117.9
monetaryItemType
table: <entity> 117.9 </entity> <entity type> monetaryItemType </entity type> <context> Total Other Current Liabilities | $ 117.9 | $ 91.9 </context>
us-gaap:OtherLiabilitiesCurrent
<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>Other Current Liabilities</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr><tr...
table
91.9
monetaryItemType
table: <entity> 91.9 </entity> <entity type> monetaryItemType </entity type> <context> Total Other Current Liabilities | $ 117.9 | $ 91.9 </context>
us-gaap:OtherLiabilitiesCurrent
<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>Other Non-Current Liabilities</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr...
table
261.3
monetaryItemType
table: <entity> 261.3 </entity> <entity type> monetaryItemType </entity type> <context> Asset Retirement Obligation (a)(b) Asset Retirement Obligation (a)(b) | $ 261.3 | $ 202.9 </context>
us-gaap:AssetRetirementObligationsNoncurrent
<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>Other Non-Current Liabilities</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr...
table
202.9
monetaryItemType
table: <entity> 202.9 </entity> <entity type> monetaryItemType </entity type> <context> Asset Retirement Obligation (a)(b) Asset Retirement Obligation (a)(b) | $ 261.3 | $ 202.9 </context>
us-gaap:AssetRetirementObligationsNoncurrent
<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>Other Non-Current Liabilities</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr...
table
36.4
monetaryItemType
table: <entity> 36.4 </entity> <entity type> monetaryItemType </entity type> <context> Other | 36.4 | 40.5 </context>
us-gaap:OtherAccruedLiabilitiesNoncurrent
<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>Other Non-Current Liabilities</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr...
table
40.5
monetaryItemType
table: <entity> 40.5 </entity> <entity type> monetaryItemType </entity type> <context> Other | 36.4 | 40.5 </context>
us-gaap:OtherAccruedLiabilitiesNoncurrent
<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>Other Non-Current Liabilities</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr...
table
312.8
monetaryItemType
table: <entity> 312.8 </entity> <entity type> monetaryItemType </entity type> <context> Total Other Non-Current Liabilities | $ 312.8 | $ 264.3 </context>
us-gaap:OtherLiabilitiesNoncurrent
<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>Other Non-Current Liabilities</td><td></td><td></td><td></td></tr><tr><td>As of December 31</td><td>2024</td><td></td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td><td></td></tr...
table
264.3
monetaryItemType
table: <entity> 264.3 </entity> <entity type> monetaryItemType </entity type> <context> Total Other Non-Current Liabilities | $ 312.8 | $ 264.3 </context>
us-gaap:OtherLiabilitiesNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>As December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Operating Lease Cost</td><td>$ 5.4</td><td></td><td>$ 5.0</td><td></td></tr><tr><td>Finance Lease Cost</td><td>$ ...
table
5.4
monetaryItemType
table: <entity> 5.4 </entity> <entity type> monetaryItemType </entity type> <context> Operating Lease Cost | $ 5.4 | $ 5.0 </context>
us-gaap:OperatingLeaseCost
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>As December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Operating Lease Cost</td><td>$ 5.4</td><td></td><td>$ 5.0</td><td></td></tr><tr><td>Finance Lease Cost</td><td>$ ...
table
5.0
monetaryItemType
table: <entity> 5.0 </entity> <entity type> monetaryItemType </entity type> <context> Operating Lease Cost | $ 5.4 | $ 5.0 </context>
us-gaap:OperatingLeaseCost
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>As December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Operating Lease Cost</td><td>$ 5.4</td><td></td><td>$ 5.0</td><td></td></tr><tr><td>Finance Lease Cost</td><td>$ ...
table
5.4
monetaryItemType
table: <entity> 5.4 </entity> <entity type> monetaryItemType </entity type> <context> Operating Lease Cost | $ 5.4 | $ 5.0 </context>
us-gaap:OperatingLeasePayments
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>As December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Operating Lease Cost</td><td>$ 5.4</td><td></td><td>$ 5.0</td><td></td></tr><tr><td>Finance Lease Cost</td><td>$ ...
table
5.0
monetaryItemType
table: <entity> 5.0 </entity> <entity type> monetaryItemType </entity type> <context> Operating Lease Cost | $ 5.4 | $ 5.0 </context>
us-gaap:OperatingLeasePayments
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>As December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Operating Lease Cost</td><td>$ 5.4</td><td></td><td>$ 5.0</td><td></td></tr><tr><td>Finance Lease Cost</td><td>$ ...
table
0.4
monetaryItemType
table: <entity> 0.4 </entity> <entity type> monetaryItemType </entity type> <context> Financing Cash Flows From Finance Leases | $ 0.4 | $ 0.2 </context>
us-gaap:FinanceLeasePrincipalPayments
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>As December 31</td><td>2024</td><td>2023</td></tr><tr><td>Millions</td><td></td><td></td></tr><tr><td>Operating Lease Cost</td><td>$ 5.4</td><td></td><td>$ 5.0</td><td></td></tr><tr><td>Finance Lease Cost</td><td>$ ...
table
0.2
monetaryItemType
table: <entity> 0.2 </entity> <entity type> monetaryItemType </entity type> <context> Financing Cash Flows From Finance Leases | $ 0.4 | $ 0.2 </context>
us-gaap:FinanceLeasePrincipalPayments
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></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></td><td></td><td></td></tr><tr><td>Balance Sheet Information Related to Leases:</td><td></td><td></td></tr><t...
table
9.1
monetaryItemType
table: <entity> 9.1 </entity> <entity type> monetaryItemType </entity type> <context> Operating Lease Other Non-Current Assets Operating Lease Other Non-Current Assets Operating Lease Other Non-Current Assets | $ 9.1 | $ 10.7 </context>
us-gaap:OperatingLeaseRightOfUseAsset
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></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></td><td></td><td></td></tr><tr><td>Balance Sheet Information Related to Leases:</td><td></td><td></td></tr><t...
table
10.7
monetaryItemType
table: <entity> 10.7 </entity> <entity type> monetaryItemType </entity type> <context> Operating Lease Other Non-Current Assets Operating Lease Other Non-Current Assets Operating Lease Other Non-Current Assets | $ 9.1 | $ 10.7 </context>
us-gaap:OperatingLeaseRightOfUseAsset
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></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></td><td></td><td></td></tr><tr><td>Balance Sheet Information Related to Leases:</td><td></td><td></td></tr><t...
table
1.9
monetaryItemType
table: <entity> 1.9 </entity> <entity type> monetaryItemType </entity type> <context> Finance Lease Other Non-Current Assets Finance Lease Other Non-Current Assets Finance Lease Other Non-Current Assets | 1.9 | 2.1 </context>
us-gaap:FinanceLeaseRightOfUseAsset
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></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></td><td></td><td></td></tr><tr><td>Balance Sheet Information Related to Leases:</td><td></td><td></td></tr><t...
table
2.1
monetaryItemType
table: <entity> 2.1 </entity> <entity type> monetaryItemType </entity type> <context> Finance Lease Other Non-Current Assets Finance Lease Other Non-Current Assets Finance Lease Other Non-Current Assets | 1.9 | 2.1 </context>
us-gaap:FinanceLeaseRightOfUseAsset
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></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></td><td></td><td></td></tr><tr><td>Balance Sheet Information Related to Leases:</td><td></td><td></td></tr><t...
table
3.2
monetaryItemType
table: <entity> 3.2 </entity> <entity type> monetaryItemType </entity type> <context> Operating Lease Other Current Liabilities Operating Lease Other Current Liabilities Operating Lease Other Current Liabilities | $ 3.2 | $ 3.0 </context>
us-gaap:OperatingLeaseLiabilityCurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></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></td><td></td><td></td></tr><tr><td>Balance Sheet Information Related to Leases:</td><td></td><td></td></tr><t...
table
3.0
monetaryItemType
table: <entity> 3.0 </entity> <entity type> monetaryItemType </entity type> <context> Operating Lease Other Current Liabilities Operating Lease Other Current Liabilities Operating Lease Other Current Liabilities | $ 3.2 | $ 3.0 </context>
us-gaap:OperatingLeaseLiabilityCurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></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></td><td></td><td></td></tr><tr><td>Balance Sheet Information Related to Leases:</td><td></td><td></td></tr><t...
table
0.4
monetaryItemType
table: <entity> 0.4 </entity> <entity type> monetaryItemType </entity type> <context> Finance Lease Other Current Liabilities Finance Lease Other Current Liabilities Finance Lease Other Current Liabilities | 0.4 | 0.4 </context>
us-gaap:FinanceLeaseLiabilityCurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></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></td><td></td><td></td></tr><tr><td>Balance Sheet Information Related to Leases:</td><td></td><td></td></tr><t...
table
6.0
monetaryItemType
table: <entity> 6.0 </entity> <entity type> monetaryItemType </entity type> <context> Operating Lease Other Non-Current Liabilities Operating Lease Other Non-Current Liabilities Operating Lease Other Non-Current Liabilities | 6.0 | 7.7 </context>
us-gaap:OperatingLeaseLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></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></td><td></td><td></td></tr><tr><td>Balance Sheet Information Related to Leases:</td><td></td><td></td></tr><t...
table
7.7
monetaryItemType
table: <entity> 7.7 </entity> <entity type> monetaryItemType </entity type> <context> Operating Lease Other Non-Current Liabilities Operating Lease Other Non-Current Liabilities Operating Lease Other Non-Current Liabilities | 6.0 | 7.7 </context>
us-gaap:OperatingLeaseLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></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></td><td></td><td></td></tr><tr><td>Balance Sheet Information Related to Leases:</td><td></td><td></td></tr><t...
table
1.3
monetaryItemType
table: <entity> 1.3 </entity> <entity type> monetaryItemType </entity type> <context> Finance Lease Other Non-Current Liabilities Finance Lease Other Non-Current Liabilities Finance Lease Other Non-Current Liabilities | 1.3 | 1.6 </context>
us-gaap:FinanceLeaseLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></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></td><td></td><td></td></tr><tr><td>Balance Sheet Information Related to Leases:</td><td></td><td></td></tr><t...
table
1.6
monetaryItemType
table: <entity> 1.6 </entity> <entity type> monetaryItemType </entity type> <context> Finance Lease Other Non-Current Liabilities Finance Lease Other Non-Current Liabilities Finance Lease Other Non-Current Liabilities | 1.3 | 1.6 </context>
us-gaap:FinanceLeaseLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></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></td><td></td><td></td></tr><tr><td>Balance Sheet Information Related to Leases:</td><td></td><td></td></tr><t...
table
5.4
monetaryItemType
table: <entity> 5.4 </entity> <entity type> monetaryItemType </entity type> <context> Operating Lease Rent Expense | $ 5.4 | $ 5.0 </context>
us-gaap:OperatingLeaseCost
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></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></td><td></td><td></td></tr><tr><td>Balance Sheet Information Related to Leases:</td><td></td><td></td></tr><t...
table
5.0
monetaryItemType
table: <entity> 5.0 </entity> <entity type> monetaryItemType </entity type> <context> Operating Lease Rent Expense | $ 5.4 | $ 5.0 </context>
us-gaap:OperatingLeaseCost
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></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></td><td></td><td></td></tr><tr><td>Balance Sheet Information Related to Leases:</td><td></td><td></td></tr><t...
table
0.1
monetaryItemType
table: <entity> 0.1 </entity> <entity type> monetaryItemType </entity type> <context> Finance Lease Interest Expense | 0.1 | — </context>
us-gaap:FinanceLeaseInterestExpense
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></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></td><td></td><td></td></tr><tr><td>Balance Sheet Information Related to Leases:</td><td></td><td></td></tr><t...
table
monetaryItemType
table: <entity> — </entity> <entity type> monetaryItemType </entity type> <context> Finance Lease Interest Expense | 0.1 | — </context>
us-gaap:FinanceLeaseInterestExpense
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></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></td><td></td><td></td></tr><tr><td>Balance Sheet Information Related to Leases:</td><td></td><td></td></tr><t...
table
0.2
monetaryItemType
table: <entity> 0.2 </entity> <entity type> monetaryItemType </entity type> <context> Finance Lease Amortization Expense | 0.2 | 0.1 </context>
us-gaap:FinanceLeaseRightOfUseAssetAmortization
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></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></td><td></td><td></td></tr><tr><td>Balance Sheet Information Related to Leases:</td><td></td><td></td></tr><t...
table
0.1
monetaryItemType
table: <entity> 0.1 </entity> <entity type> monetaryItemType </entity type> <context> Finance Lease Interest Expense | 0.1 | — </context>
us-gaap:FinanceLeaseRightOfUseAssetAmortization
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></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></td><td></td><td></td></tr><tr><td>Balance Sheet Information Related to Leases:</td><td></td><td></td></tr><t...
table
5.7
monetaryItemType
table: <entity> 5.7 </entity> <entity type> monetaryItemType </entity type> <context> Total Operating and Finance Lease Expenses | $ 5.7 | $ 5.1 </context>
us-gaap:LeaseCost
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></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></td><td></td><td></td></tr><tr><td>Balance Sheet Information Related to Leases:</td><td></td><td></td></tr><t...
table
5.1
monetaryItemType
table: <entity> 5.1 </entity> <entity type> monetaryItemType </entity type> <context> Total Operating and Finance Lease Expenses | $ 5.7 | $ 5.1 </context>
us-gaap:LeaseCost
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></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></td><td></td><td></td></tr><tr><td>Balance Sheet Information Related to Leases:</td><td></td><td></td></tr><t...
table
4.0
percentItemType
table: <entity> 4.0 </entity> <entity type> percentItemType </entity type> <context> Operating Leases - Vehicles and Equipment | 4.0 | % | 4.0 | % </context>
us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></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></td><td></td><td></td></tr><tr><td>Balance Sheet Information Related to Leases:</td><td></td><td></td></tr><t...
table
5.9
percentItemType
table: <entity> 5.9 </entity> <entity type> percentItemType </entity type> <context> Operating Leases - Land and Other | 5.9 | % | 5.0 | % </context>
us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></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></td><td></td><td></td></tr><tr><td>Balance Sheet Information Related to Leases:</td><td></td><td></td></tr><t...
table
5.0
percentItemType
table: <entity> 5.0 </entity> <entity type> percentItemType </entity type> <context> Operating Lease Rent Expense | $ 5.4 | $ 5.0 </context>
us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></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></td><td></td><td></td></tr><tr><td>Balance Sheet Information Related to Leases:</td><td></td><td></td></tr><t...
table
5.4
percentItemType
table: <entity> 5.4 </entity> <entity type> percentItemType </entity type> <context> Operating Lease Rent Expense | $ 5.4 | $ 5.0 </context>
us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent
<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></td><td></td><td></td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td><td></td><td>Operating</td><td>Finance</td></tr><tr><td>2025</td><td></td><td></td><td></td><td>$ 3.4</...
table
3.4
monetaryItemType
table: <entity> 3.4 </entity> <entity type> monetaryItemType </entity type> <context> 2025 | $ 3.4 | $ 0.4 </context>
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
<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></td><td></td><td></td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td><td></td><td>Operating</td><td>Finance</td></tr><tr><td>2025</td><td></td><td></td><td></td><td>$ 3.4</...
table
0.4
monetaryItemType
table: <entity> 0.4 </entity> <entity type> monetaryItemType </entity type> <context> 2025 | $ 3.4 | $ 0.4 </context>
us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths
<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></td><td></td><td></td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td><td></td><td>Operating</td><td>Finance</td></tr><tr><td>2025</td><td></td><td></td><td></td><td>$ 3.4</...
table
3.3
monetaryItemType
table: <entity> 3.3 </entity> <entity type> monetaryItemType </entity type> <context> 2026 | 3.3 | 0.4 </context>
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo
<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></td><td></td><td></td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td><td></td><td>Operating</td><td>Finance</td></tr><tr><td>2025</td><td></td><td></td><td></td><td>$ 3.4</...
table
0.4
monetaryItemType
table: <entity> 0.4 </entity> <entity type> monetaryItemType </entity type> <context> 2025 | $ 3.4 | $ 0.4 </context>
us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo
<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></td><td></td><td></td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td><td></td><td>Operating</td><td>Finance</td></tr><tr><td>2025</td><td></td><td></td><td></td><td>$ 3.4</...
table
4.2
monetaryItemType
table: <entity> 4.2 </entity> <entity type> monetaryItemType </entity type> <context> 2027 | 4.2 | 0.5 </context>
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree
<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></td><td></td><td></td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td><td></td><td>Operating</td><td>Finance</td></tr><tr><td>2025</td><td></td><td></td><td></td><td>$ 3.4</...
table
0.5
monetaryItemType
table: <entity> 0.5 </entity> <entity type> monetaryItemType </entity type> <context> 2027 | 4.2 | 0.5 </context>
us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree
<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></td><td></td><td></td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td><td></td><td>Operating</td><td>Finance</td></tr><tr><td>2025</td><td></td><td></td><td></td><td>$ 3.4</...
table
0.3
monetaryItemType
table: <entity> 0.3 </entity> <entity type> monetaryItemType </entity type> <context> 2028 | 0.3 | 0.6 </context>
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour
<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></td><td></td><td></td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td><td></td><td>Operating</td><td>Finance</td></tr><tr><td>2025</td><td></td><td></td><td></td><td>$ 3.4</...
table
0.6
monetaryItemType
table: <entity> 0.6 </entity> <entity type> monetaryItemType </entity type> <context> 2028 | 0.3 | 0.6 </context>
us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour
<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></td><td></td><td></td><td></td><td></td></tr><tr><td>Millions</td><td></td><td></td><td></td><td>Operating</td><td>Finance</td></tr><tr><td>2025</td><td></td><td></td><td></td><td>$ 3.4</...
table
0.1
monetaryItemType
table: <entity> 0.1 </entity> <entity type> monetaryItemType </entity type> <context> 2029 | 0.1 | — </context>
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive