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VARIABLE INTEREST ENTITIES AND EQUITY METHOD INVESTMENTS - VIE Consolidation (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | ---
ASSETS |  |  |  |
Current Assets | $ 5,788.8 | $ 6,082.1 |  |
Net Property, Plant and Equipment | 82,415.6 | 76,693.4 |  |
Other Noncurrent Assets | 14,873.6 | 13,908.5 |  |
TOTAL ASSETS | 103,078.0 | 96,684.0 |  |
LIABILITIES AND EQUITY |  |  |  |
Current Liabilities | 13,009.3 | 11,583.6 |  |
Noncurrent Liabilities | 63,044.8 | 59,772.0 |  |
Equity | 26,986.1 | 25,285.9 | $ 24,122.4 | $ 22,680.2
TOTAL LIABILITIES, MEZZANINE EQUITY AND EQUITY | 103,078.0 | 96,684.0 |  |
SOUTHWESTERN ELECTRIC POWER COMPANY |  |  |  |
ASSETS |  |  |  |
Current Assets | 438.0 | 541.3 |  |
Net Property, Plant and Equipment | 9,446.1 | 8,558.4 |  |
Other Noncurrent Assets | 1,610.9 | 1,457.9 |  |
TOTAL ASSETS | 11,495.0 | 10,557.6 |  |
LIABILITIES AND EQUITY |  |  |  |
Current Liabilities | 1,031.6 | 686.9 |  |
Noncurrent Liabilities | 6,558.4 | 6,100.3 |  |
Equity | 3,905.0 | 3,770.4 | $ 3,674.8 | $ 3,149.8
TOTAL LIABILITIES, MEZZANINE EQUITY AND EQUITY | 11,495.0 | 10,557.6 |  |
INDIANA MICHIGAN POWER COMPANY |  |  |  |
ASSETS |  |  |  |
Current Assets | 543.6 | 528.0 |  |
Net Property, Plant and Equipment | 7,679.3 | 7,629.0 |  |
Other Noncurrent Assets | 5,312.6 | 4,651.0 |  |
TOTAL ASSETS | 13,535.5 | 12,808.0 |  |
LIABILITIES AND EQUITY |  |  |  |
Current Liabilities | 1,071.2 | 830.2 |  |
Noncurrent Liabilities | 9,067.8 | 8,837.6 |  |
TOTAL LIABILITIES, MEZZANINE EQUITY AND EQUITY | 13,535.5 | 12,808.0 |  |
AEP TEXAS INC. |  |  |  |
ASSETS |  |  |  |
Current Assets | 500.4 | 520.1 |  |
Net Property, Plant and Equipment | 14,043.5 | 12,774.0 |  |
Other Noncurrent Assets | 655.7 | 696.6 |  |
TOTAL ASSETS | 15,199.6 | 13,990.7 |  |
LIABILITIES AND EQUITY |  |  |  |
Current Liabilities | 1,407.1 | 749.4 |  |
Noncurrent Liabilities | 8,907.9 | 8,445.2 |  |
TOTAL LIABILITIES, MEZZANINE EQUITY AND EQUITY | 15,199.6 | 13,990.7 |  |
APPALACHIAN POWER COMPANY |  |  |  |
ASSETS |  |  |  |
Current Assets | 1,094.9 | 1,059.0 |  |
Net Property, Plant and Equipment | 13,612.5 | 12,931.5 |  |
Other Noncurrent Assets | 1,958.5 | 1,721.4 |  |
TOTAL ASSETS | 16,665.9 | 15,711.9 |  |
LIABILITIES AND EQUITY |  |  |  |
Current Liabilities | 2,025.5 | 1,685.9 |  |
Noncurrent Liabilities | 8,892.4 | 8,749.3 |  |
TOTAL LIABILITIES, MEZZANINE EQUITY AND EQUITY | 16,665.9 | 15,711.9 |  |
Variable Interest Entity, Primary Beneficiary | AEP Credit |  |  |  |
ASSETS |  |  |  |
Current Assets | 1,118.3 | 1,208.8 |  |
Net Property, Plant and Equipment | 0.0 | 0.0 |  |
Other Noncurrent Assets | 10.5 | 9.6 |  |
TOTAL ASSETS | 1,128.8 | 1,218.4 |  |
LIABILITIES AND EQUITY |  |  |  |
Current Liabilities | 1,068.8 | 1,155.0 |  |
Noncurrent Liabilities | 1.0 | 0.9 |  |
Equity | 59.0 | 62.5 |  |
TOTAL LIABILITIES, MEZZANINE EQUITY AND EQUITY | 1,128.8 | 1,218.4 |  |
Variable Interest Entity, Primary Beneficiary | Protected Cell of EIS |  |  |  |
ASSETS |  |  |  |
Current Assets | 218.5 | 205.3 |  |
Net Property, Plant and Equipment | 0.0 | 0.0 |  |
Other Noncurrent Assets | 0.0 | 0.0 |  |
TOTAL ASSETS | 218.5 | 205.3 |  |
LIABILITIES AND EQUITY |  |  |  |
Current Liabilities | 54.7 | 49.2 |  |
Noncurrent Liabilities | 96.0 | 91.7 |  |
Equity | 67.8 | 64.4 |  |
TOTAL LIABILITIES, MEZZANINE EQUITY AND EQUITY | 218.5 | 205.3 |  |
Variable Interest Entity, Primary Beneficiary | Transource Energy |  |  |  |
ASSETS |  |  |  |
Current Assets | 40.2 | 36.9 |  |
Net Property, Plant and Equipment | 598.3 | 533.4 |  |
Other Noncurrent Assets | 3.5 | 5.1 |  |
TOTAL ASSETS | 642.0 | 575.4 |  |
LIABILITIES AND EQUITY |  |  |  |
Current Liabilities | 57.2 | 45.3 |  |
Noncurrent Liabilities | 274.3 | 241.5 |  |
Equity | 310.5 | 288.6 |  |
TOTAL LIABILITIES, MEZZANINE EQUITY AND EQUITY | 642.0 | 575.4 |  |
Variable Interest Entity, Primary Beneficiary | SOUTHWESTERN ELECTRIC POWER COMPANY | Sabine |  |  |  |
ASSETS |  |  |  |
Current Assets | 6.0 | 4.2 |  |
Net Property, Plant and Equipment | 0.0 | 0.0 |  |
Other Noncurrent Assets | 110.8 | 150.7 |  |
TOTAL ASSETS | 116.8 | 154.9 |  |
LIABILITIES AND EQUITY |  |  |  |
Current Liabilities | 20.1 | 19.9 |  |
Noncurrent Liabilities | 96.3 | 134.8 |  |
Equity | 0.4 | 0.2 |  |
TOTAL LIABILITIES, MEZZANINE EQUITY AND EQUITY | 116.8 | 154.9 |  |
Variable Interest Entity, Primary Beneficiary | SOUTHWESTERN ELECTRIC POWER COMPANY | SWEPCo Storm Recovery Funding |  |  |  |
ASSETS |  |  |  |
Current Assets | 3.4 |  |  |
Net Property, Plant and Equipment | 0.0 |  |  |
Other Noncurrent Assets | 331.4 |  |  |
TOTAL ASSETS | 334.8 |  |  |
LIABILITIES AND EQUITY |  |  |  |
Current Liabilities | 24.4 |  |  |
Noncurrent Liabilities | 308.7 |  |  |
Equity | 1.7 |  |  |
TOTAL LIABILITIES, MEZZANINE EQUITY AND EQUITY | 334.8 |  |  |
Variable Interest Entity, Primary Beneficiary | INDIANA MICHIGAN POWER COMPANY | DCC Fuel |  |  |  |
ASSETS |  |  |  |
Current Assets | 79.3 | 81.9 |  |
Net Property, Plant and Equipment | 132.3 | 153.8 |  |
Other Noncurrent Assets | 63.6 | 81.7 |  |
TOTAL ASSETS | 275.2 | 317.4 |  |
LIABILITIES AND EQUITY |  |  |  |
Current Liabilities | 79.2 | 81.7 |  |
Noncurrent Liabilities | 196.0 | 235.7 |  |
Equity | 0.0 | 0.0 |  |
TOTAL LIABILITIES, MEZZANINE EQUITY AND EQUITY | 275.2 | 317.4 |  |
Variable Interest Entity, Primary Beneficiary | AEP TEXAS INC. | AEP Texas Transition Funding |  |  |  |
ASSETS |  |  |  |
Current Assets |  | 25.5 |  |
Net Property, Plant and Equipment |  | 0.0 |  |
Other Noncurrent Assets |  | 71.4 |  |
TOTAL ASSETS |  | 96.9 |  |
LIABILITIES AND EQUITY |  |  |  |
Current Liabilities |  | 75.5 |  |
Noncurrent Liabilities |  | 17.0 |  |
Equity |  | 4.4 |  |
TOTAL LIABILITIES, MEZZANINE EQUITY AND EQUITY |  | 96.9 |  |
Variable Interest Entity, Primary Beneficiary | AEP TEXAS INC. | AEP Texas Restoration Funding |  |  |  |
ASSETS |  |  |  |
Current Assets | 21.3 | 27.5 |  |
Net Property, Plant and Equipment | 0.0 | 0.0 |  |
Other Noncurrent Assets | 121.9 | 145.6 |  |
TOTAL ASSETS | 143.2 | 173.1 |  |
LIABILITIES AND EQUITY |  |  |  |
Current Liabilities | 30.7 | 36.8 |  |
Noncurrent Liabilities | 111.2 | 135.1 |  |
Equity | 1.3 | 1.2 |  |
TOTAL LIABILITIES, MEZZANINE EQUITY AND EQUITY | 143.2 | 173.1 |  |
Variable Interest Entity, Primary Beneficiary | AEP TEXAS INC. | Other Noncurrent Assets | AEP Texas Transition Funding |  |  |  |
LIABILITIES AND EQUITY |  |  |  |
Intercompany item eliminated in consolidation | 5.0 | 8.0 |  |
Variable Interest Entity, Primary Beneficiary | AEP TEXAS INC. | Other Noncurrent Assets | AEP Texas Restoration Funding |  |  |  |
LIABILITIES AND EQUITY |  |  |  |
Intercompany item eliminated in consolidation | 1.0 | 6.0 |  |
Variable Interest Entity, Primary Beneficiary | APPALACHIAN POWER COMPANY | APCo Appalachian Consumer Rate Relief Funding |  |  |  |
ASSETS |  |  |  |
Current Assets | 14.2 | 13.3 |  |
Net Property, Plant and Equipment | 0.0 | 0.0 |  |
Other Noncurrent Assets | 109.6 | 138.2 |  |
TOTAL ASSETS | 123.8 | 151.5 |  |
LIABILITIES AND EQUITY |  |  |  |
Current Liabilities | 30.5 | 29.9 |  |
Noncurrent Liabilities | 91.4 | 119.7 |  |
Equity | 1.9 | 1.9 |  |
TOTAL LIABILITIES, MEZZANINE EQUITY AND EQUITY | $ 123.8 | 151.5 |  |
Variable Interest Entity, Primary Beneficiary | APPALACHIAN POWER COMPANY | Other Noncurrent Assets | APCo Appalachian Consumer Rate Relief Funding |  |  |  |
LIABILITIES AND EQUITY |  |  |  |
Intercompany item eliminated in consolidation |  | $ 2.0 |  |

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