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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><td></td><td></td><td></td></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
72.0
monetaryItemType
table: <entity> 72.0 </entity> <entity type> monetaryItemType </entity type> <context> Plant Retirement Costs - Unrecovered Plant | 68.0 | 72.0 | 19 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
107.0
monetaryItemType
table: <entity> 107.0 </entity> <entity type> monetaryItemType </entity type> <context> Long-term Under-recovered Fuel Costs - Virginia | β€” | 107.0 </context>
us-gaap:RegulatoryAssetsNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><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>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
5.2
monetaryItemType
table: <entity> 5.2 </entity> <entity type> monetaryItemType </entity type> <context> Other Regulatory Assets Approved for Recovery | 5.2 | 7.1 | various </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
7.1
monetaryItemType
table: <entity> 7.1 </entity> <entity type> monetaryItemType </entity type> <context> Other Regulatory Assets Approved for Recovery | 5.2 | 7.1 | various </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
227.3
monetaryItemType
table: <entity> 227.3 </entity> <entity type> monetaryItemType </entity type> <context> Total Regulatory Assets Currently Earning a Return | 227.3 | 340.3 </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
340.3
monetaryItemType
table: <entity> 340.3 </entity> <entity type> monetaryItemType </entity type> <context> Total Regulatory Assets Currently Earning a Return | 227.3 | 340.3 </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
307.5
monetaryItemType
table: <entity> 307.5 </entity> <entity type> monetaryItemType </entity type> <context> Plant Retirement Costs - Asset Retirement Obligation Costs | 307.5 | 324.7 | 15 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
324.7
monetaryItemType
table: <entity> 324.7 </entity> <entity type> monetaryItemType </entity type> <context> Plant Retirement Costs - Asset Retirement Obligation Costs | 307.5 | 324.7 | 15 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
107.9
monetaryItemType
table: <entity> 107.9 </entity> <entity type> monetaryItemType </entity type> <context> Pension and OPEB Funded Status | 107.9 | 115.8 | 12 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
115.8
monetaryItemType
table: <entity> 115.8 </entity> <entity type> monetaryItemType </entity type> <context> Pension and OPEB Funded Status | 107.9 | 115.8 | 12 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
67.0
monetaryItemType
table: <entity> 67.0 </entity> <entity type> monetaryItemType </entity type> <context> Unamortized Loss on Reacquired Debt | 67.0 | 70.7 | 21 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
70.7
monetaryItemType
table: <entity> 70.7 </entity> <entity type> monetaryItemType </entity type> <context> Unamortized Loss on Reacquired Debt | 67.0 | 70.7 | 21 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
26.0
monetaryItemType
table: <entity> 26.0 </entity> <entity type> monetaryItemType </entity type> <context> 2020-2022 Virginia Triennial Under-Earnings | 26.0 | 37.4 | 3 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
37.4
monetaryItemType
table: <entity> 37.4 </entity> <entity type> monetaryItemType </entity type> <context> 2020-2022 Virginia Triennial Under-Earnings | 26.0 | 37.4 | 3 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
14.2
monetaryItemType
table: <entity> 14.2 </entity> <entity type> monetaryItemType </entity type> <context> Peak Demand Reduction/Energy Efficiency | 14.2 | 15.0 | 2 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
15.0
monetaryItemType
table: <entity> 15.0 </entity> <entity type> monetaryItemType </entity type> <context> Peak Demand Reduction/Energy Efficiency | 14.2 | 15.0 | 2 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
13.2
monetaryItemType
table: <entity> 13.2 </entity> <entity type> monetaryItemType </entity type> <context> Postemployment Benefits | 13.2 | 14.9 | 3 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
14.9
monetaryItemType
table: <entity> 14.9 </entity> <entity type> monetaryItemType </entity type> <context> Postemployment Benefits | 13.2 | 14.9 | 3 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
12.9
monetaryItemType
table: <entity> 12.9 </entity> <entity type> monetaryItemType </entity type> <context> Vegetation Management Program - West Virginia | 11.9 | 12.9 | 2 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
11.6
monetaryItemType
table: <entity> 11.6 </entity> <entity type> monetaryItemType </entity type> <context> Virginia Generation Rate Adjustment Clause | 11.6 | 10.9 | 2 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
10.9
monetaryItemType
table: <entity> 10.9 </entity> <entity type> monetaryItemType </entity type> <context> Virginia Generation Rate Adjustment Clause | 11.6 | 10.9 | 2 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
10.5
monetaryItemType
table: <entity> 10.5 </entity> <entity type> monetaryItemType </entity type> <context> Excess SO 2 Allowance Inventory - Virginia Excess SO 2 Allowance Inventory - Virginia | 10.5 | 11.8 | 8 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
11.8
monetaryItemType
table: <entity> 11.8 </entity> <entity type> monetaryItemType </entity type> <context> Excess SO 2 Allowance Inventory - Virginia Excess SO 2 Allowance Inventory - Virginia | 10.5 | 11.8 | 8 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
3.4
monetaryItemType
table: <entity> 3.4 </entity> <entity type> monetaryItemType </entity type> <context> Virginia Transmission Rate Adjustment Clause | 3.4 | 25.5 | 2 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
25.5
monetaryItemType
table: <entity> 25.5 </entity> <entity type> monetaryItemType </entity type> <context> Virginia Transmission Rate Adjustment Clause | 3.4 | 25.5 | 2 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
21.9
monetaryItemType
table: <entity> 21.9 </entity> <entity type> monetaryItemType </entity type> <context> Unrealized Loss on Forward Commitments | β€” | 21.9 </context>
us-gaap:RegulatoryAssetsNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><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>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
30.0
monetaryItemType
table: <entity> 30.0 </entity> <entity type> monetaryItemType </entity type> <context> Other Regulatory Assets Approved for Recovery | 30.0 | 27.8 | various </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
27.8
monetaryItemType
table: <entity> 27.8 </entity> <entity type> monetaryItemType </entity type> <context> Other Regulatory Assets Approved for Recovery | 30.0 | 27.8 | various </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
603.2
monetaryItemType
table: <entity> 603.2 </entity> <entity type> monetaryItemType </entity type> <context> Total Regulatory Assets Currently Not Earning a Return | 603.2 | 689.3 </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
689.3
monetaryItemType
table: <entity> 689.3 </entity> <entity type> monetaryItemType </entity type> <context> Total Regulatory Assets Currently Not Earning a Return | 603.2 | 689.3 </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
830.5
monetaryItemType
table: <entity> 830.5 </entity> <entity type> monetaryItemType </entity type> <context> Total Regulatory Assets Approved for Recovery | 830.5 | 1,029.6 </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
1029.6
monetaryItemType
table: <entity> 1029.6 </entity> <entity type> monetaryItemType </entity type> <context> Total Regulatory Assets Approved for Recovery | 830.5 | 1,029.6 </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
1366.0
monetaryItemType
table: <entity> 1366.0 </entity> <entity type> monetaryItemType </entity type> <context> Total Noncurrent Regulatory Assets | $ | 1,366.0 | $ | 1,155.1 </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery ...
table
1155.1
monetaryItemType
table: <entity> 1155.1 </entity> <entity type> monetaryItemType </entity type> <context> Total Noncurrent Regulatory Assets | $ | 1,366.0 | $ | 1,155.1 </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
21.6
monetaryItemType
table: <entity> 21.6 </entity> <entity type> monetaryItemType </entity type> <context> Over-recovered Fuel Costs, West Virginia - does not pay a return | $ | 21.6 | $ | β€” | 1 year </context>
us-gaap:RegulatoryLiabilityCurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
β€”
monetaryItemType
table: <entity> β€” </entity> <entity type> monetaryItemType </entity type> <context> Over-recovered Fuel Costs, West Virginia - does not pay a return | $ | 21.6 | $ | β€” | 1 year </context>
us-gaap:RegulatoryLiabilityCurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
6.3
monetaryItemType
table: <entity> 6.3 </entity> <entity type> monetaryItemType </entity type> <context> None </context>
us-gaap:RegulatoryLiabilityNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
7.9
monetaryItemType
table: <entity> 7.9 </entity> <entity type> monetaryItemType </entity type> <context> Income Taxes, Net (a) | $ | ( 6.3 ) | $ | 7.9 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
24.9
monetaryItemType
table: <entity> 24.9 </entity> <entity type> monetaryItemType </entity type> <context> FERC 2021 Transmission Formula Rate Challenge Refunds | 24.9 | 19.7 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><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>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
19.7
monetaryItemType
table: <entity> 19.7 </entity> <entity type> monetaryItemType </entity type> <context> FERC 2021 Transmission Formula Rate Challenge Refunds | 24.9 | 19.7 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><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>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
18.6
monetaryItemType
table: <entity> 18.6 </entity> <entity type> monetaryItemType </entity type> <context> Total Regulatory Liabilities Pending Final Regulatory Determination | 18.6 | 27.6 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><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>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
27.6
monetaryItemType
table: <entity> 27.6 </entity> <entity type> monetaryItemType </entity type> <context> Total Regulatory Liabilities Pending Final Regulatory Determination | 18.6 | 27.6 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><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>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
805.6
monetaryItemType
table: <entity> 805.6 </entity> <entity type> monetaryItemType </entity type> <context> Asset Removal Costs | 805.6 | 759.6 | (b) </context>
us-gaap:RegulatoryLiabilityNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
759.6
monetaryItemType
table: <entity> 759.6 </entity> <entity type> monetaryItemType </entity type> <context> Asset Removal Costs | 805.6 | 759.6 | (b) </context>
us-gaap:RegulatoryLiabilityNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
219.3
monetaryItemType
table: <entity> 219.3 </entity> <entity type> monetaryItemType </entity type> <context> Income Taxes, Net (a) | 219.3 | 240.1 | (c) </context>
us-gaap:RegulatoryLiabilityNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
240.1
monetaryItemType
table: <entity> 240.1 </entity> <entity type> monetaryItemType </entity type> <context> Income Taxes, Net (a) | 219.3 | 240.1 | (c) </context>
us-gaap:RegulatoryLiabilityNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
β€”
monetaryItemType
table: <entity> β€” </entity> <entity type> monetaryItemType </entity type> <context> Over-recovered Fuel Costs, West Virginia - does not pay a return | $ | 21.6 | $ | β€” | 1 year </context>
us-gaap:RegulatoryLiabilityNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
0.3
monetaryItemType
table: <entity> 0.3 </entity> <entity type> monetaryItemType </entity type> <context> Deferred Investment Tax Credits | β€” | 0.3 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
1024.9
monetaryItemType
table: <entity> 1024.9 </entity> <entity type> monetaryItemType </entity type> <context> Total Regulatory Liabilities Currently Paying a Return | 1,024.9 | 1,000.0 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><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>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
1000.0
monetaryItemType
table: <entity> 1000.0 </entity> <entity type> monetaryItemType </entity type> <context> Total Regulatory Liabilities Currently Paying a Return | 1,024.9 | 1,000.0 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><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>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
35.2
monetaryItemType
table: <entity> 35.2 </entity> <entity type> monetaryItemType </entity type> <context> 2017-2019 Virginia Triennial Revenue Provision | 35.2 | 37.1 | 25 years </context>
us-gaap:RegulatoryLiabilityNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
37.1
monetaryItemType
table: <entity> 37.1 </entity> <entity type> monetaryItemType </entity type> <context> 2017-2019 Virginia Triennial Revenue Provision | 35.2 | 37.1 | 25 years </context>
us-gaap:RegulatoryLiabilityNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
10.2
monetaryItemType
table: <entity> 10.2 </entity> <entity type> monetaryItemType </entity type> <context> Virginia Transmission Rate Adjustment Clause | 10.2 | 1.5 | 2 years </context>
us-gaap:RegulatoryLiabilityNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
1.5
monetaryItemType
table: <entity> 1.5 </entity> <entity type> monetaryItemType </entity type> <context> Virginia Transmission Rate Adjustment Clause | 10.2 | 1.5 | 2 years </context>
us-gaap:RegulatoryLiabilityNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
10.0
monetaryItemType
table: <entity> 10.0 </entity> <entity type> monetaryItemType </entity type> <context> Energy Efficiency Rate Adjustment Clause - Virginia | 10.0 | 3.2 | 2 years </context>
us-gaap:RegulatoryLiabilityNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
3.2
monetaryItemType
table: <entity> 3.2 </entity> <entity type> monetaryItemType </entity type> <context> Energy Efficiency Rate Adjustment Clause - Virginia | 10.0 | 3.2 | 2 years </context>
us-gaap:RegulatoryLiabilityNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
16.9
monetaryItemType
table: <entity> 16.9 </entity> <entity type> monetaryItemType </entity type> <context> Other Regulatory Liabilities Approved for Payment | 16.9 | 12.5 | various </context>
us-gaap:RegulatoryLiabilityNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
12.5
monetaryItemType
table: <entity> 12.5 </entity> <entity type> monetaryItemType </entity type> <context> Other Regulatory Liabilities Approved for Payment | 16.9 | 12.5 | various </context>
us-gaap:RegulatoryLiabilityNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
72.3
monetaryItemType
table: <entity> 72.3 </entity> <entity type> monetaryItemType </entity type> <context> Total Regulatory Liabilities Currently Not Paying a Return | 72.3 | 54.3 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
54.3
monetaryItemType
table: <entity> 54.3 </entity> <entity type> monetaryItemType </entity type> <context> Total Regulatory Liabilities Currently Not Paying a Return | 72.3 | 54.3 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
1097.2
monetaryItemType
table: <entity> 1097.2 </entity> <entity type> monetaryItemType </entity type> <context> Total Regulatory Liabilities Approved for Payment | 1,097.2 | 1,054.3 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
1054.3
monetaryItemType
table: <entity> 1054.3 </entity> <entity type> monetaryItemType </entity type> <context> Total Regulatory Liabilities Approved for Payment | 1,097.2 | 1,054.3 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
1115.8
monetaryItemType
table: <entity> 1115.8 </entity> <entity type> monetaryItemType </entity type> <context> Total Noncurrent Regulatory Liabilities and Deferred Investment Tax Credits Total Noncurrent Regulatory Liabilities and Deferred Investment Tax Credits | $ | 1,115.8 | $ | 1,081.9 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<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></tr><tr><td></td><td></td><td>APCo</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Refund Pe...
table
1081.9
monetaryItemType
table: <entity> 1081.9 </entity> <entity type> monetaryItemType </entity type> <context> Total Noncurrent Regulatory Liabilities and Deferred Investment Tax Credits Total Noncurrent Regulatory Liabilities and Deferred Investment Tax Credits | $ | 1,115.8 | $ | 1,081.9 </context>
us-gaap:RegulatoryLiabilityNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
10.6
monetaryItemType
table: <entity> 10.6 </entity> <entity type> monetaryItemType </entity type> <context> Under-recovered Fuel Costs, Michigan - earns a return | $ | 10.6 | $ | 14.8 | 1 year </context>
us-gaap:RegulatoryAssetsCurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
14.8
monetaryItemType
table: <entity> 14.8 </entity> <entity type> monetaryItemType </entity type> <context> Under-recovered Fuel Costs, Michigan - earns a return | $ | 10.6 | $ | 14.8 | 1 year </context>
us-gaap:RegulatoryAssetsCurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
6.4
monetaryItemType
table: <entity> 6.4 </entity> <entity type> monetaryItemType </entity type> <context> Other Regulatory Assets Pending Final Regulatory Approval | $ | 6.4 | $ | 0.2 </context>
us-gaap:RegulatoryAssetsNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><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>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
0.2
monetaryItemType
table: <entity> 0.2 </entity> <entity type> monetaryItemType </entity type> <context> Other Regulatory Assets Pending Final Regulatory Approval | $ | 6.4 | $ | 0.2 </context>
us-gaap:RegulatoryAssetsNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><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>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
74.0
monetaryItemType
table: <entity> 74.0 </entity> <entity type> monetaryItemType </entity type> <context> Plant Retirement Costs - Asset Retirement Obligation Costs (a) | 74.0 | β€” </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
β€”
monetaryItemType
table: <entity> β€” </entity> <entity type> monetaryItemType </entity type> <context> Plant Retirement Costs - Asset Retirement Obligation Costs (a) | 74.0 | β€” </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
26.7
monetaryItemType
table: <entity> 26.7 </entity> <entity type> monetaryItemType </entity type> <context> NOLC Costs - Indiana (b) | 26.7 | β€” </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
6.3
monetaryItemType
table: <entity> 6.3 </entity> <entity type> monetaryItemType </entity type> <context> Storm-Related Costs - Indiana | 6.3 | 29.7 </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
29.7
monetaryItemType
table: <entity> 29.7 </entity> <entity type> monetaryItemType </entity type> <context> Storm-Related Costs - Indiana | 6.3 | 29.7 </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
1.6
monetaryItemType
table: <entity> 1.6 </entity> <entity type> monetaryItemType </entity type> <context> Other Regulatory Assets Pending Final Regulatory Approval | 1.6 | 3.3 </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
3.3
monetaryItemType
table: <entity> 3.3 </entity> <entity type> monetaryItemType </entity type> <context> Other Regulatory Assets Pending Final Regulatory Approval | 1.6 | 3.3 </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
108.6
monetaryItemType
table: <entity> 108.6 </entity> <entity type> monetaryItemType </entity type> <context> Total Regulatory Assets Currently Not Earning a Return | 108.6 | 33.0 </context>
us-gaap:RegulatoryAssetsNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><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>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
33.0
monetaryItemType
table: <entity> 33.0 </entity> <entity type> monetaryItemType </entity type> <context> Total Regulatory Assets Currently Not Earning a Return | 108.6 | 33.0 </context>
us-gaap:RegulatoryAssetsNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><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>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
115.0
monetaryItemType
table: <entity> 115.0 </entity> <entity type> monetaryItemType </entity type> <context> Total Regulatory Assets Pending Final Regulatory Approval | 115.0 | 33.2 </context>
us-gaap:RegulatoryAssetsNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><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>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
33.2
monetaryItemType
table: <entity> 33.2 </entity> <entity type> monetaryItemType </entity type> <context> Total Regulatory Assets Pending Final Regulatory Approval | 115.0 | 33.2 </context>
us-gaap:RegulatoryAssetsNoncurrent
<table><tr><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><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>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
98.0
monetaryItemType
table: <entity> 98.0 </entity> <entity type> monetaryItemType </entity type> <context> Plant Retirement Costs - Unrecovered Plant | 98.0 | 122.5 | 4 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
122.5
monetaryItemType
table: <entity> 122.5 </entity> <entity type> monetaryItemType </entity type> <context> Plant Retirement Costs - Unrecovered Plant | 98.0 | 122.5 | 4 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
37.3
monetaryItemType
table: <entity> 37.3 </entity> <entity type> monetaryItemType </entity type> <context> Rockport Plant Dry Sorbent Injection System and Selective Catalytic Reduction | 37.3 | 46.9 | 4 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
46.9
monetaryItemType
table: <entity> 46.9 </entity> <entity type> monetaryItemType </entity type> <context> Rockport Plant Dry Sorbent Injection System and Selective Catalytic Reduction | 37.3 | 46.9 | 4 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
20.5
monetaryItemType
table: <entity> 20.5 </entity> <entity type> monetaryItemType </entity type> <context> Cook Plant Uprate Project | 20.5 | 22.9 | 9 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
22.9
monetaryItemType
table: <entity> 22.9 </entity> <entity type> monetaryItemType </entity type> <context> Cook Plant Uprate Project | 20.5 | 22.9 | 9 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
10.1
monetaryItemType
table: <entity> 10.1 </entity> <entity type> monetaryItemType </entity type> <context> Deferred Cook Plant Life Cycle Management Project Costs - Michigan, FERC | 10.1 | 11.1 | 10 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
11.1
monetaryItemType
table: <entity> 11.1 </entity> <entity type> monetaryItemType </entity type> <context> Deferred Cook Plant Life Cycle Management Project Costs - Michigan, FERC | 10.1 | 11.1 | 10 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
7.8
monetaryItemType
table: <entity> 7.8 </entity> <entity type> monetaryItemType </entity type> <context> Cook Plant Turbine - Indiana | 7.8 | 8.4 | 14 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
8.4
monetaryItemType
table: <entity> 8.4 </entity> <entity type> monetaryItemType </entity type> <context> Cook Plant Turbine - Indiana | 7.8 | 8.4 | 14 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
21.1
monetaryItemType
table: <entity> 21.1 </entity> <entity type> monetaryItemType </entity type> <context> Other Regulatory Assets Approved for Recovery | 21.1 | 17.5 | various </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
17.5
monetaryItemType
table: <entity> 17.5 </entity> <entity type> monetaryItemType </entity type> <context> Other Regulatory Assets Approved for Recovery | 21.1 | 17.5 | various </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
194.8
monetaryItemType
table: <entity> 194.8 </entity> <entity type> monetaryItemType </entity type> <context> Total Regulatory Assets Currently Earning a Return | 194.8 | 229.3 </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
229.3
monetaryItemType
table: <entity> 229.3 </entity> <entity type> monetaryItemType </entity type> <context> Total Regulatory Assets Currently Earning a Return | 194.8 | 229.3 </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
108.8
monetaryItemType
table: <entity> 108.8 </entity> <entity type> monetaryItemType </entity type> <context> Income Taxes, Net | 108.8 | β€” | (c) </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
43.0
monetaryItemType
table: <entity> 43.0 </entity> <entity type> monetaryItemType </entity type> <context> Cook Plant Nuclear Refueling Outage Levelization | 43.0 | 55.7 | 3 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
55.7
monetaryItemType
table: <entity> 55.7 </entity> <entity type> monetaryItemType </entity type> <context> Cook Plant Nuclear Refueling Outage Levelization | 43.0 | 55.7 | 3 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
20.2
monetaryItemType
table: <entity> 20.2 </entity> <entity type> monetaryItemType </entity type> <context> Storm-Related Costs - Indiana | 20.2 | 3.4 | 4 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
3.4
monetaryItemType
table: <entity> 3.4 </entity> <entity type> monetaryItemType </entity type> <context> Storm-Related Costs - Indiana | 20.2 | 3.4 | 4 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
14.6
monetaryItemType
table: <entity> 14.6 </entity> <entity type> monetaryItemType </entity type> <context> Pension and OPEB Funded Status | 14.6 | 25.4 | 12 years </context>
us-gaap:RegulatoryAssetsNoncurrent
<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></tr><tr><td></td><td></td><td>I&M</td></tr><tr><td></td><td></td><td>December 31,</td><td></td><td>Remaining Recovery P...
table
25.4
monetaryItemType
table: <entity> 25.4 </entity> <entity type> monetaryItemType </entity type> <context> Pension and OPEB Funded Status | 14.6 | 25.4 | 12 years </context>
us-gaap:RegulatoryAssetsNoncurrent