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DERIVATIVES AND HEDGING - Schedule of Offsetting Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Total Assets |  |
Gross Amounts Recognized | $ 1,039.1 | $ 1,167.4
Current Risk Management Assets | 210.4 | 217.5
Long-term Risk Management Assets | 289.1 | 321.2
Total Risk Management Assets | 499.5 | 538.7
Total Liabilities |  |
Gross Amounts Recognized | 780.4 | 1,083.4
Current Risk Management Liabilities | 100.0 | 229.6
Long-term Risk Management Liabilities | 224.4 | 241.8
Total Risk Management Liabilities | 324.4 | 471.4
Total MTM Derivative Contract Net Assets (Liabilities) | 175.1 | 67.3
Prepaid Expenses and Other Current Assets |  |
Total Assets |  |
Gross Amounts Recognized | 479.1 | 611.8
Gross Amounts Offset | (268.7) | (394.3)
Other Noncurrent Assets |  |
Total Assets |  |
Gross Amounts Recognized | 560.0 | 555.6
Gross Amounts Offset | (270.9) | (234.4)
Other Current Liabilities |  |
Total Liabilities |  |
Gross Amounts Recognized | 351.7 | 646.7
Gross Amounts Offset | (251.7) | (417.1)
Other Noncurrent Liabilities |  |
Total Liabilities |  |
Gross Amounts Recognized | 428.7 | 436.7
Gross Amounts Offset | (204.3) | (194.9)
AEP Texas |  |
Total Assets |  |
Gross Amounts Recognized | 0.0 | 0.0
Current Risk Management Assets | 0.0 | 0.0
Long-term Risk Management Assets | 0.0 | 0.0
Total Risk Management Assets | 0.0 | 0.0
Total Liabilities |  |
Gross Amounts Recognized | 0.3 | 2.9
Current Risk Management Liabilities | 0.0 | 2.7
Long-term Risk Management Liabilities | 0.0 | 0.0
Total Risk Management Liabilities | 0.0 | 2.7
Total MTM Derivative Contract Net Assets (Liabilities) | 0.0 | (2.7)
AEP Texas | Prepaid Expenses and Other Current Assets |  |
Total Assets |  |
Gross Amounts Recognized | 0.0 | 0.0
Gross Amounts Offset | 0.0 | 0.0
AEP Texas | Other Noncurrent Assets |  |
Total Assets |  |
Gross Amounts Recognized | 0.0 | 0.0
Gross Amounts Offset | 0.0 | 0.0
AEP Texas | Other Current Liabilities |  |
Total Liabilities |  |
Gross Amounts Recognized | 0.3 | 2.9
Gross Amounts Offset | (0.3) | (0.2)
AEP Texas | Other Noncurrent Liabilities |  |
Total Liabilities |  |
Gross Amounts Recognized | 0.0 | 0.0
Gross Amounts Offset | 0.0 | 0.0
APCo |  |
Total Assets |  |
Gross Amounts Recognized | 42.2 | 24.9
Current Risk Management Assets | 35.7 | 22.4
Long-term Risk Management Assets | 1.4 | 0.0
Total Risk Management Assets | 37.1 | 22.4
Total Liabilities |  |
Gross Amounts Recognized | 7.4 | 25.4
Current Risk Management Liabilities | 2.0 | 15.9
Long-term Risk Management Liabilities | 0.2 | 6.6
Total Risk Management Liabilities | 2.2 | 22.5
Total MTM Derivative Contract Net Assets (Liabilities) | 34.9 | (0.1)
APCo | Prepaid Expenses and Other Current Assets |  |
Total Assets |  |
Gross Amounts Recognized | 40.2 | 24.6
Gross Amounts Offset | (4.5) | (2.2)
APCo | Other Noncurrent Assets |  |
Total Assets |  |
Gross Amounts Recognized | 2.0 | 0.3
Gross Amounts Offset | (0.6) | (0.3)
APCo | Other Current Liabilities |  |
Total Liabilities |  |
Gross Amounts Recognized | 6.6 | 18.5
Gross Amounts Offset | (4.6) | (2.6)
APCo | Other Noncurrent Liabilities |  |
Total Liabilities |  |
Gross Amounts Recognized | 0.8 | 6.9
Gross Amounts Offset | (0.6) | (0.3)
I&M |  |
Total Assets |  |
Gross Amounts Recognized | 29.7 | 42.1
Current Risk Management Assets | 18.4 | 27.8
Long-term Risk Management Assets | 0.0 | 11.8
Total Risk Management Assets | 18.4 | 39.6
Total Liabilities |  |
Gross Amounts Recognized | 12.6 | 5.6
Current Risk Management Liabilities | 0.3 | 2.0
Long-term Risk Management Liabilities | 0.4 | 0.0
Total Risk Management Liabilities | 0.7 | 2.0
Total MTM Derivative Contract Net Assets (Liabilities) | 17.7 | 37.6
I&M | Prepaid Expenses and Other Current Assets |  |
Total Assets |  |
Gross Amounts Recognized | 28.5 | 30.1
Gross Amounts Offset | (10.1) | (2.3)
I&M | Other Noncurrent Assets |  |
Total Assets |  |
Gross Amounts Recognized | 1.2 | 12.0
Gross Amounts Offset | (1.2) | (0.2)
I&M | Other Current Liabilities |  |
Total Liabilities |  |
Gross Amounts Recognized | 10.5 | 5.4
Gross Amounts Offset | (10.2) | (3.4)
I&M | Other Noncurrent Liabilities |  |
Total Liabilities |  |
Gross Amounts Recognized | 2.1 | 0.2
Gross Amounts Offset | (1.7) | (0.2)
OPCo |  |
Total Assets |  |
Gross Amounts Recognized | 0.0 | 0.0
Current Risk Management Assets | 0.0 | 0.0
Long-term Risk Management Assets | 0.0 | 0.0
Total Risk Management Assets | 0.0 | 0.0
Total Liabilities |  |
Gross Amounts Recognized | 47.7 | 50.8
Current Risk Management Liabilities | 7.3 | 6.8
Long-term Risk Management Liabilities | 40.2 | 43.9
Total Risk Management Liabilities | 47.5 | 50.7
Total MTM Derivative Contract Net Assets (Liabilities) | (47.5) | (50.7)
OPCo | Prepaid Expenses and Other Current Assets |  |
Total Assets |  |
Gross Amounts Recognized | 0.0 | 0.0
Gross Amounts Offset | 0.0 | 0.0
OPCo | Other Noncurrent Assets |  |
Total Assets |  |
Gross Amounts Recognized | 0.0 | 0.0
Gross Amounts Offset | 0.0 | 0.0
OPCo | Other Current Liabilities |  |
Total Liabilities |  |
Gross Amounts Recognized | 7.5 | 6.9
Gross Amounts Offset | (0.2) | (0.1)
OPCo | Other Noncurrent Liabilities |  |
Total Liabilities |  |
Gross Amounts Recognized | 40.2 | 43.9
Gross Amounts Offset | 0.0 | 0.0
PSO |  |
Total Assets |  |
Gross Amounts Recognized | 23.9 | 19.7
Current Risk Management Assets | 20.6 | 19.0
Long-term Risk Management Assets | 1.4 | 0.0
Total Risk Management Assets | 22.0 | 19.0
Total Liabilities |  |
Gross Amounts Recognized | 7.8 | 30.7
Current Risk Management Liabilities | 5.8 | 28.9
Long-term Risk Management Liabilities | 0.0 | 1.0
Total Risk Management Liabilities | 5.8 | 29.9
Total MTM Derivative Contract Net Assets (Liabilities) | 16.2 | (10.9)
PSO | Prepaid Expenses and Other Current Assets |  |
Total Assets |  |
Gross Amounts Recognized | 22.3 | 19.7
Gross Amounts Offset | (1.7) | (0.7)
PSO | Other Noncurrent Assets |  |
Total Assets |  |
Gross Amounts Recognized | 1.6 | 0.0
Gross Amounts Offset | (0.2) | 0.0
PSO | Other Current Liabilities |  |
Total Liabilities |  |
Gross Amounts Recognized | 7.6 | 29.7
Gross Amounts Offset | (1.8) | (0.8)
PSO | Other Noncurrent Liabilities |  |
Total Liabilities |  |
Gross Amounts Recognized | 0.2 | 1.0
Gross Amounts Offset | (0.2) | 0.0
SWEPCo |  |
Total Assets |  |
Gross Amounts Recognized | 19.1 | 12.5
Current Risk Management Assets | 18.1 | 11.6
Long-term Risk Management Assets | 0.0 | 0.0
Total Risk Management Assets | 18.1 | 11.6
Total Liabilities |  |
Gross Amounts Recognized | 3.4 | 16.6
Current Risk Management Liabilities | 2.3 | 14.4
Long-term Risk Management Liabilities | 0.0 | 1.2
Total Risk Management Liabilities | 2.3 | 15.6
Total MTM Derivative Contract Net Assets (Liabilities) | 15.8 | (4.0)
SWEPCo | Prepaid Expenses and Other Current Assets |  |
Total Assets |  |
Gross Amounts Recognized | 19.1 | 12.0
Gross Amounts Offset | (1.0) | (0.4)
SWEPCo | Other Noncurrent Assets |  |
Total Assets |  |
Gross Amounts Recognized | 0.0 | 0.5
Gross Amounts Offset | 0.0 | (0.5)
SWEPCo | Other Current Liabilities |  |
Total Liabilities |  |
Gross Amounts Recognized | 3.4 | 14.9
Gross Amounts Offset | (1.1) | (0.5)
SWEPCo | Other Noncurrent Liabilities |  |
Total Liabilities |  |
Gross Amounts Recognized | 0.0 | 1.7
Gross Amounts Offset | $ 0.0 | $ (0.5)

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