XML 73 R44.htm IDEA: XBRL DOCUMENT
v3.23.1

Derivatives and Hedging (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2022
Notional Volume of Derivative Instruments | Notional Volume of Derivative Instruments December 31, 2022
Primary Risk Exposure |  | Unit of Measure |  | AEP |  | AEP Texas |  | APCo |  | I&M |  | OPCo |  | PSO |  | SWEPCo
|  |  |  | (in millions)
Commodity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Power |  | MWhs |  | 226.8 |  |  | — |  |  | 17.9 |  |  | 4.2 |  |  | 2.5 |  |  | 2.9 |  |  | 2.2 |
Natural Gas |  | MMBtus |  | 77.1 |  |  | — |  |  | 1.9 |  |  | — |  |  | — |  |  | 1.9 |  |  | 2.1 |
Heating Oil and Gasoline |  | Gallons |  | 6.9 |  |  | 1.9 |  |  | 1.0 |  |  | 0.7 |  |  | 1.4 |  |  | 0.9 |  |  | 1.0 |
Interest Rate |  | USD |  | $ | 99.9 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Interest Rate on Long-term Debt |  | USD |  | $ | 1,650.0 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 200.0 |  |  | $ | — |
December 31, 2021
Primary Risk Exposure |  | Unit of Measure |  | AEP |  | AEP Texas |  | APCo |  | I&M |  | OPCo |  | PSO |  | SWEPCo
|  |  |  | (in millions)
Commodity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Power |  | MWhs |  | 287.9 |  |  | — |  |  | 33.1 |  |  | 13.6 |  |  | 2.7 |  |  | 11.9 |  |  | 3.4 |
Natural Gas |  | MMBtus |  | 34.1 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 1.3 |  |  | 5.1 |
Heating Oil and Gasoline |  | Gallons |  | 7.4 |  |  | 1.9 |  |  | 1.1 |  |  | 0.7 |  |  | 1.5 |  |  | 0.8 |  |  | 1.0 |
Interest Rate |  | USD |  | $ | 116.5 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Interest Rate on Long-term Debt |  | USD |  | $ | 950.0 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Fair Value of Derivative Instruments | AEP
|  | December 31, 2022
|  | Risk Management Contracts |  | Hedging Contracts |  | Gross Amounts of Risk Management Assets/ Liabilities Recognized |  | Gross Amounts Offset in the Statement of Financial Position (b) |  | Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location |  | Commodity (a) |  | Commodity (a) |  | Interest Rate (a) |  |  |
|  | (in millions) (as adjusted)
Current Risk Management Assets |  | $ | 965.4 |  |  | $ | 212.2 |  |  | $ | 1.8 |  |  | $ | 1,179.4 |  |  | $ | (830.6) |  |  | $ | 348.8 |
Long-term Risk Management Assets |  | 565.6 |  |  | 148.9 |  |  | 14.3 |  |  | 728.8 |  |  | (444.7) |  |  | 284.1 |
Total Assets |  | 1,531.0 |  |  | 361.1 |  |  | 16.1 |  |  | 1,908.2 |  |  | (1,275.3) |  |  | 632.9 |
Current Risk Management Liabilities |  | 663.8 |  |  | 60.4 |  |  | 41.4 |  |  | 765.6 |  |  | (620.4) |  |  | 145.2 |
Long-term Risk Management Liabilities |  | 412.0 |  |  | 17.4 |  |  | 91.1 |  |  | 520.5 |  |  | (175.3) |  |  | 345.2 |
Total Liabilities |  | 1,075.8 |  |  | 77.8 |  |  | 132.5 |  |  | 1,286.1 |  |  | (795.7) |  |  | 490.4 |
Total MTM Derivative Contract Net Assets (Liabilities) (d) |  | $ | 455.2 |  |  | $ | 283.3 |  |  | $ | (116.4) |  |  | $ | 622.1 |  |  | $ | (479.6) |  |  | $ | 142.5 |
|  | December 31, 2021
|  | Risk Management Contracts |  | Hedging Contracts |  | Gross Amounts of Risk Management Assets/ Liabilities Recognized |  | Gross Amounts Offset in the Statement of Financial Position (b) |  | Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location |  | Commodity (a) |  | Commodity (a) |  | Interest Rate (a) |  |  |
|  | (in millions) (as adjusted)
Current Risk Management Assets |  | $ | 520.9 |  |  | $ | 176.0 |  |  | $ | 1.2 |  |  | $ | 698.1 |  |  | $ | (497.7) |  |  | $ | 200.4 |
Long-term Risk Management Assets |  | 370.5 |  |  | 89.1 |  |  | — |  |  | 459.6 |  |  | (192.6) |  |  | 267.0 |
Total Assets |  | 891.4 |  |  | 265.1 |  |  | 1.2 |  |  | 1,157.7 |  |  | (690.3) |  |  | 467.4 |
Current Risk Management Liabilities |  | 397.2 |  |  | 40.9 |  |  | — |  |  | 438.1 |  |  | (362.6) |  |  | 75.5 |
Long-term Risk Management Liabilities |  | 243.9 |  |  | 16.7 |  |  | 38.1 |  |  | 298.7 |  |  | (68.4) |  |  | 230.3 |
Total Liabilities |  | 641.1 |  |  | 57.6 |  |  | 38.1 |  |  | 736.8 |  |  | (431.0) |  |  | 305.8 |
Total MTM Derivative Contract Net Assets (Liabilities) |  | $ | 250.3 |  |  | $ | 207.5 |  |  | $ | (36.9) |  |  | $ | 420.9 |  |  | $ | (259.3) |  |  | $ | 161.6 |
AEP Texas
|  | December 31, 2022
|  | Risk Management |  | Gross Amounts Offset |  | Net Amounts of Assets/Liabilities
|  | Contracts - |  | in the Statement of |  | Presented in the Statement of
Balance Sheet Location |  | Commodity (a) |  | Financial Position (b) |  | Financial Position (c)
|  | (in millions)
Current Risk Management Assets |  | $ | — |  |  | $ | — |  |  | $ | — |
Long-term Risk Management Assets |  | — |  |  | — |  |  | — |
Total Assets |  | — |  |  | — |  |  | — |
Current Risk Management Liabilities |  | — |  |  | — |  |  | — |
Long-term Risk Management Liabilities |  | — |  |  | — |  |  | — |
Total Liabilities |  | — |  |  | — |  |  | — |
Total MTM Derivative Contract Net Assets |  | $ | — |  |  | $ | — |  |  | $ | — |
|  | December 31, 2021
|  | Risk Management |  | Gross Amounts Offset |  | Net Amounts of Assets/Liabilities
|  | Contracts - |  | in the Statement of |  | Presented in the Statement of
Balance Sheet Location |  | Commodity (a) |  | Financial Position (b) |  | Financial Position (c)
|  | (in millions)
Current Risk Management Assets |  | $ | 0.6 |  |  | $ | (0.6) |  |  | $ | — |
Long-term Risk Management Assets |  | — |  |  | — |  |  | — |
Total Assets |  | 0.6 |  |  | (0.6) |  |  | — |
Current Risk Management Liabilities |  | — |  |  | — |  |  | — |
Long-term Risk Management Liabilities |  | — |  |  | — |  |  | — |
Total Liabilities |  | — |  |  | — |  |  | — |
Total MTM Derivative Contract Net Assets (Liabilities) |  | $ | 0.6 |  |  | $ | (0.6) |  |  | $ | — |
APCo
|  | December 31, 2022
|  | Risk Management |  |  |  |  |  | Gross Amounts Offset |  | Net Amounts of Assets/Liabilities
|  | Contracts - |  |  |  |  |  | in the Statement of |  | Presented in the Statement of
Balance Sheet Location |  | Commodity (a) |  |  |  |  |  | Financial Position (b) |  | Financial Position (c)
|  | (in millions)
Current Risk Management Assets |  | $ | 69.3 |  |  |  |  |  |  | $ | (0.2) |  |  | $ | 69.1 |
Long-term Risk Management Assets |  | 0.7 |  |  |  |  |  |  | (0.7) |  |  | — |
Total Assets |  | 70.0 |  |  |  |  |  |  | (0.9) |  |  | 69.1 |
Current Risk Management Liabilities |  | 4.1 |  |  |  |  |  |  | (0.5) |  |  | 3.6 |
Long-term Risk Management Liabilities |  | 0.7 |  |  |  |  |  |  | (0.6) |  |  | 0.1 |
Total Liabilities |  | 4.8 |  |  |  |  |  |  | (1.1) |  |  | 3.7 |
Total MTM Derivative Contract Net Assets (d) |  | $ | 65.2 |  |  |  |  |  |  | $ | 0.2 |  |  | $ | 65.4 |
|  | December 31, 2021
|  | Risk Management |  |  |  |  |  | Gross Amounts Offset |  | Net Amounts of Assets/Liabilities
|  | Contracts - |  |  |  |  |  | in the Statement of |  | Presented in the Statement of
Balance Sheet Location |  | Commodity (a) |  |  |  |  |  | Financial Position (b) |  | Financial Position (c)
|  | (in millions)
Current Risk Management Assets |  | $ | 47.5 |  |  |  |  |  |  | $ | (5.5) |  |  | $ | 42.0 |
Long-term Risk Management Assets |  | 0.2 |  |  |  |  |  |  | (0.2) |  |  | — |
Total Assets |  | 47.7 |  |  |  |  |  |  | (5.7) |  |  | 42.0 |
Current Risk Management Liabilities |  | 7.2 |  |  |  |  |  |  | (6.4) |  |  | 0.8 |
Long-term Risk Management Liabilities |  | 0.2 |  |  |  |  |  |  | (0.2) |  |  | — |
Total Liabilities |  | 7.4 |  |  |  |  |  |  | (6.6) |  |  | 0.8 |
Total MTM Derivative Contract Net Assets |  | $ | 40.3 |  |  |  |  |  |  | $ | 0.9 |  |  | $ | 41.2 |
I&M
|  | December 31, 2022
|  | Risk Management |  | Gross Amounts Offset |  | Net Amounts of Assets/Liabilities
|  | Contracts - |  | in the Statement of |  | Presented in the Statement of
Balance Sheet Location |  | Commodity (a) |  | Financial Position (b) |  | Financial Position (c)
|  | (in millions)
Current Risk Management Assets |  | $ | 16.0 |  |  | $ | (0.8) |  |  | $ | 15.2 |
Long-term Risk Management Assets |  | 0.5 |  |  | (0.3) |  |  | 0.2 |
Total Assets |  | 16.5 |  |  | (1.1) |  |  | 15.4 |
Current Risk Management Liabilities |  | 0.9 |  |  | (0.9) |  |  | — |
Long-term Risk Management Liabilities |  | 0.3 |  |  | (0.3) |  |  | — |
Total Liabilities |  | 1.2 |  |  | (1.2) |  |  | — |
Total MTM Derivative Contract Net Assets (d) |  | $ | 15.3 |  |  | $ | 0.1 |  |  | $ | 15.4 |
|  | December 31, 2021
|  | Risk Management |  | Gross Amounts Offset |  | Net Amounts of Assets/Liabilities
|  | Contracts - |  | in the Statement of |  | Presented in the Statement of
Balance Sheet Location |  | Commodity (a) |  | Financial Position (b) |  | Financial Position (c)
|  | (in millions)
Current Risk Management Assets |  | $ | 11.1 |  |  | $ | (7.8) |  |  | $ | 3.3 |
Long-term Risk Management Assets |  | 0.2 |  |  | (0.2) |  |  | — |
Total Assets |  | 11.3 |  |  | (8.0) |  |  | 3.3 |
Current Risk Management Liabilities |  | 14.8 |  |  | (9.8) |  |  | 5.0 |
Long-term Risk Management Liabilities |  | 0.2 |  |  | (0.2) |  |  | — |
Total Liabilities |  | 15.0 |  |  | (10.0) |  |  | 5.0 |
Total MTM Derivative Contract Net Assets (Liabilities) |  | $ | (3.7) |  |  | $ | 2.0 |  |  | $ | (1.7) |
OPCo
|  | December 31, 2022
|  | Risk Management |  | Gross Amounts Offset |  | Net Amounts of Assets/Liabilities
|  | Contracts - |  | in the Statement of |  | Presented in the Statement of
Balance Sheet Location |  | Commodity (a) |  | Financial Position (b) |  | Financial Position (c)
|  | (in millions)
Current Risk Management Assets |  | $ | — |  |  | $ | — |  |  | $ | — |
Long-term Risk Management Assets |  | — |  |  | — |  |  | — |
Total Assets |  | — |  |  | — |  |  | — |
Current Risk Management Liabilities |  | 2.1 |  |  | (0.3) |  |  | 1.8 |
Long-term Risk Management Liabilities |  | 37.9 |  |  | — |  |  | 37.9 |
Total Liabilities |  | 40.0 |  |  | (0.3) |  |  | 39.7 |
Total MTM Derivative Net Assets (Liabilities) (d) |  | $ | (40.0) |  |  | $ | 0.3 |  |  | $ | (39.7) |
|  | December 31, 2021
|  | Risk Management |  | Gross Amounts Offset |  | Net Amounts of Assets/Liabilities
|  | Contracts - |  | in the Statement of |  | Presented in the Statement of
Balance Sheet Location |  | Commodity (a) |  | Financial Position (b) |  | Financial Position (c)
|  | (in millions)
Current Risk Management Assets |  | $ | 0.5 |  |  | $ | (0.5) |  |  | $ | — |
Long-term Risk Management Assets |  | — |  |  | — |  |  | — |
Total Assets |  | 0.5 |  |  | (0.5) |  |  | — |
Current Risk Management Liabilities |  | 6.7 |  |  | — |  |  | 6.7 |
Long-term Risk Management Liabilities |  | 85.8 |  |  | — |  |  | 85.8 |
Total Liabilities |  | 92.5 |  |  | — |  |  | 92.5 |
Total MTM Derivative Contract Net Liabilities |  | $ | (92.0) |  |  | $ | (0.5) |  |  | $ | (92.5) |
PSO
|  |  | December 31, 2022
|  |  | Risk Management Contracts |  | Hedging Contracts |  | Gross Amounts of Risk Management Assets/Liabilities Recognized |  | Gross Amounts Offset in the Statement of Financial Position (b) |  | Net Amounts of Assets/Liabilities Presented in the Statement of Financial Position (c)
Balance Sheet Location |  | Commodity (a) |  | Interest Rate (a) |  |  |
|  | (in millions)
Current Risk Management Assets |  | $ | 24.1 |  |  | $ | 1.6 |  |  | $ | 25.7 |  |  | $ | (0.4) |  |  | $ | 25.3 |
Long-term Risk Management Assets |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total Assets |  | 24.1 |  |  | 1.6 |  |  | 25.7 |  |  | (0.4) |  |  | 25.3 |
Current Risk Management Liabilities |  | 2.1 |  |  | — |  |  | 2.1 |  |  | (0.5) |  |  | 1.6 |
Long-term Risk Management Liabilities |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Total Liabilities |  | 2.1 |  |  | — |  |  | 2.1 |  |  | (0.5) |  |  | 1.6 |
Total MTM Derivative Contract Net Assets (d) |  | $ | 22.0 |  |  | $ | 1.6 |  |  | $ | 23.6 |  |  | $ | 0.1 |  |  | $ | 23.7 |
|  | December 31, 2021 |
|  | Risk Management |  |  |  | Gross Amounts Offset |  | Net Amounts of Assets/Liabilities |
|  | Contracts - |  |  |  | in the Statement of |  | Presented in the Statement of |
Balance Sheet Location |  | Commodity (a) |  |  |  | Financial Position (b) |  | Financial Position (c) |
|  | (in millions) |
Current Risk Management Assets |  | $ | 12.4 |  |  |  |  | $ | (0.3) |  |  | $ | 12.1 |  |
Long-term Risk Management Assets |  | — |  |  |  |  | — |  |  | — |  |
Total Assets |  | 12.4 |  |  |  |  | (0.3) |  |  | 12.1 |  |
Current Risk Management Liabilities |  | 3.7 |  |  |  |  | — |  |  | 3.7 |  |
Long-term Risk Management Liabilities |  | — |  |  |  |  | — |  |  | — |  |
Total Liabilities |  | 3.7 |  |  |  |  | — |  |  | 3.7 |  |
Total MTM Derivative Contract Net Assets (Liabilities) |  | $ | 8.7 |  |  |  |  | $ | (0.3) |  |  | $ | 8.4 |  |
SWEPCo
|  | December 31, 2022
|  | Risk Management |  | Gross Amounts Offset |  | Net Amounts of Assets/Liabilities
|  | Contracts - |  | in the Statement of |  | Presented in the Statement of
Balance Sheet Location |  | Commodity (a) |  | Financial Position (b) |  | Financial Position (c)
|  | (in millions)
Current Risk Management Assets |  | $ | 16.8 |  |  | $ | (0.4) |  |  | $ | 16.4 |
Long-term Risk Management Assets |  | — |  |  | — |  |  | — |
Total Assets |  | 16.8 |  |  | (0.4) |  |  | 16.4 |
Current Risk Management Liabilities |  | 2.0 |  |  | (0.6) |  |  | 1.4 |
Long-term Risk Management Liabilities |  | — |  |  | — |  |  | — |
Total Liabilities |  | 2.0 |  |  | (0.6) |  |  | 1.4 |
Total MTM Derivative Contract Net Assets (d) |  | $ | 14.8 |  |  | $ | 0.2 |  |  | $ | 15.0 |
|  | December 31, 2021
|  | Risk Management |  | Gross Amounts Offset |  | Net Amounts of Assets/Liabilities
|  | Contracts - |  | in the Statement of |  | Presented in the Statement of
Balance Sheet Location |  | Commodity (a) |  | Financial Position (b) |  | Financial Position (c)
|  | (in millions)
Current Risk Management Assets |  | $ | 10.1 |  |  | $ | (0.3) |  |  | $ | 9.8 |
Long-term Risk Management Assets |  | 1.1 |  |  | — |  |  | 1.1 |
Total Assets |  | 11.2 |  |  | (0.3) |  |  | 10.9 |
Current Risk Management Liabilities |  | 2.1 |  |  | — |  |  | 2.1 |
Long-term Risk Management Liabilities |  | — |  |  | — |  |  | — |
Total Liabilities |  | 2.1 |  |  | — |  |  | 2.1 |
Total MTM Derivative Contract Net Assets (Liabilities) |  | $ | 9.1 |  |  | $ | (0.3) |  |  | $ | 8.8 |
(a)Derivative instruments within these categories are disclosed as gross. These instruments are subject to master netting agreements and are presented on the balance sheets on a net basis in accordance with the accounting guidance for “Derivatives and Hedging.” (b)Amounts include counterparty netting of risk management and hedging contracts and associated cash collateral in accordance with the accounting guidance for “Derivatives and Hedging.” (c)All derivative contracts subject to a master netting arrangement or similar agreement are offset in the statement of financial position. (d)Increase in amounts as of December 31, 2022 are primarily due to increases in commodity prices for power and natural gas and an increase in value of FTRs.
Amount of Gain (Loss) Recognized on Risk Management Contracts | Amount of Gain (Loss) Recognized on Risk Management Contracts
|  | Year Ended December 31, 2022
Location of Gain (Loss) |  | AEP |  | AEP Texas |  | APCo |  | I&M |  | OPCo |  | PSO |  | SWEPCo
|  | (in millions)
Vertically Integrated Utilities Revenues |  | $ | 11.1 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Generation & Marketing Revenues |  | 313.8 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Electric Generation, Transmission and Distribution Revenues |  | — |  |  | — |  |  | 0.5 |  |  | 10.6 |  |  | — |  |  | — |  |  | — |
Purchased Electricity for Resale |  | 5.0 |  |  | — |  |  | 4.5 |  |  | 0.1 |  |  | — |  |  | 0.2 |  |  | — |
Other Operation |  | 4.8 |  |  | 1.5 |  |  | 0.4 |  |  | 0.5 |  |  | 0.8 |  |  | 0.6 |  |  | 0.8 |
Maintenance |  | 6.7 |  |  | 1.8 |  |  | 0.9 |  |  | 0.6 |  |  | 1.2 |  |  | 0.8 |  |  | 1.1 |
Regulatory Assets (a) |  | 52.6 |  |  | 0.1 |  |  | (0.1) |  |  | (0.8) |  |  | 52.1 |  |  | 3.6 |  |  | (2.1) |
Regulatory Liabilities (a) |  | 299.7 |  |  | (0.6) |  |  | 82.4 |  |  | 8.6 |  |  | 3.7 |  |  | 98.5 |  |  | 77.9 |
Total Gain on Risk Management Contracts (b) |  | $ | 693.7 |  |  | $ | 2.8 |  |  | $ | 88.6 |  |  | $ | 19.6 |  |  | $ | 57.8 |  |  | $ | 103.7 |  |  | $ | 77.7 |
|  | Year Ended December 31, 2021
Location of Gain (Loss) |  | AEP |  | AEP Texas |  | APCo |  | I&M |  | OPCo |  | PSO |  | SWEPCo
|  | (in millions)
Vertically Integrated Utilities Revenues |  | $ | (0.6) |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Generation & Marketing Revenues |  | 169.1 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Electric Generation, Transmission and Distribution Revenues |  | — |  |  | — |  |  | (0.5) |  |  | (0.1) |  |  | — |  |  | — |  |  | — |
Purchased Electricity for Resale |  | 2.0 |  |  | — |  |  | 1.8 |  |  | — |  |  | — |  |  | — |  |  | — |
Other Operation |  | 2.8 |  |  | 0.8 |  |  | 0.3 |  |  | 0.3 |  |  | 0.5 |  |  | 0.3 |  |  | 0.4 |
Maintenance |  | 3.4 |  |  | 1.0 |  |  | 0.5 |  |  | 0.3 |  |  | 0.6 |  |  | 0.4 |  |  | 0.5 |
Regulatory Assets (a) |  | (9.1) |  |  | — |  |  | (2.7) |  |  | (14.8) |  |  | 10.0 |  |  | (3.6) |  |  | 3.6 |
Regulatory Liabilities (a) |  | 156.4 |  |  | 0.2 |  |  | 55.9 |  |  | (3.9) |  |  | — |  |  | 48.9 |  |  | 37.0 |
Total Gain (Loss) on Risk Management Contracts |  | $ | 324.0 |  |  | $ | 2.0 |  |  | $ | 55.3 |  |  | $ | (18.2) |  |  | $ | 11.1 |  |  | $ | 46.0 |  |  | $ | 41.5 |
|  | Year Ended December 31, 2020
Location of Gain (Loss) |  | AEP |  | AEP Texas |  | APCo |  | I&M |  | OPCo |  | PSO |  | SWEPCo
|  | (in millions)
Vertically Integrated Utilities Revenues |  | $ | 0.8 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Generation & Marketing Revenues |  | 9.5 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Electric Generation, Transmission and Distribution Revenues |  | — |  |  | — |  |  | 0.4 |  |  | 0.1 |  |  | — |  |  | — |  |  | 0.1 |
Purchased Electricity for Resale |  | 1.4 |  |  | — |  |  | 1.2 |  |  | 0.1 |  |  | — |  |  | — |  |  | — |
Other Operation |  | (2.0) |  |  | (0.6) |  |  | (0.2) |  |  | (0.2) |  |  | (0.3) |  |  | (0.2) |  |  | (0.3) |
Maintenance |  | (2.9) |  |  | (0.8) |  |  | (0.4) |  |  | (0.3) |  |  | (0.5) |  |  | (0.3) |  |  | (0.4) |
Regulatory Assets (a) |  | (4.8) |  |  | — |  |  | — |  |  | (0.1) |  |  | (6.6) |  |  | — |  |  | 1.4 |
Regulatory Liabilities (a) |  | 114.9 |  |  | 0.4 |  |  | 20.3 |  |  | 12.4 |  |  | 12.4 |  |  | 39.1 |  |  | 20.2 |
Total Gain (Loss) on Risk Management Contracts |  | $ | 116.9 |  |  | $ | (1.0) |  |  | $ | 21.3 |  |  | $ | 12.0 |  |  | $ | 5.0 |  |  | $ | 38.6 |  |  | $ | 21.0 |
(a)Represents realized and unrealized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the balance sheets. (b)Increase in amounts for the year ended December 31, 2022 are primarily due to increases in commodity prices for power and natural gas and an increase in value of FTRs.
Impact of Fair Value Hedges on Balance Sheet |
|  | Carrying Amount of the Hedged Liabilities |  | Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Liabilities
|  | December 31, 2022 |  | December 31, 2021 |  | December 31, 2022 |  | December 31, 2021
|  | (in millions)
Long-term Debt (a) (b) |  | $ | (855.5) |  |  | $ | (952.3) |  |  | $ | 89.7 |  |  | $ | (8.5) |
(a)Amounts included on the Balance Sheet within Current and Noncurrent Liabilities line items Long-term Debt Due within One Year and Long-term Debt, respectively. (b)Amounts include $(38) million and $(46) million as of December 31, 2022 and 2021, respectively, for the fair value hedge adjustment of hedged debt obligations for which hedge accounting has been discontinued.
Gain (Loss) on Hedging Instruments |
| Years Ended December 31,
| 2022 |  | 2021 |  | 2020
| (in millions)
Gain (Loss) on Interest Rate Contracts: |  |  |  |  |
Fair Value Hedging Instruments (a) | $ | (90.4) |  |  | $ | (35.5) |  |  | $ | 41.1 |
Fair Value Portion of Long-term Debt (a) | 90.4 |  |  | 35.5 |  |  | (41.1) |
(a)Gain (Loss) is included in Interest Expense on the statements of income.
Impact of Cash Flow Hedges on the Balance Sheet | Impact of Cash Flow Hedges on AEP’s Balance Sheets
|  | December 31, 2022 |  | December 31, 2021
|  | Commodity |  | Interest Rate |  | Commodity |  | Interest Rate
|  | (in millions)
AOCI Gain (Loss) Net of Tax |  | $ | 223.5 |  |  | $ | 0.3 |  |  | $ | 163.7 |  |  | $ | (21.3) |
Portion Expected to be Reclassed to Net Income During the Next Twelve Months |  | 119.9 |  |  | 0.3 |  |  | 106.7 |  |  | (3.3) |
Impact of Cash Flow Hedges on the Registrant Subsidiaries’ Balance Sheets
|  | December 31, 2022 |  | December 31, 2021
|  | Interest Rate
|  |  |  | Expected to be |  |  |  | Expected to be
|  |  |  | Reclassified to |  |  |  | Reclassified to
|  |  |  | Net Income During |  |  |  | Net Income During
|  | AOCI Gain (Loss) |  | the Next |  | AOCI Gain (Loss) |  | the Next
Company |  | Net of Tax |  | Twelve Months |  | Net of Tax |  | Twelve Months
|  | (in millions)
AEP Texas |  | $ | (0.3) |  |  | $ | (0.2) |  |  | $ | (1.3) |  |  | $ | (1.1) |
APCo |  | 6.7 |  |  | 0.8 |  |  | 7.5 |  |  | 0.8 |
I&M |  | (5.1) |  |  | (0.6) |  |  | (6.7) |  |  | (1.6) |
PSO |  | 1.3 |  |  | 0.1 |  |  | — |  |  | — |
SWEPCo |  | 1.1 |  |  | 0.2 |  |  | 1.2 |  |  | 0.1 |

X
- Definition Tabular disclosure of the impact of cash flow hedges on the balance sheet. + References No definition available. + Details
Name: | aep_ImpactOfCashFlowHedgesOnBalanceSheetTextBlock
Namespace Prefix: | aep_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Impact of Fair Value Hedges on Condensed Balance Sheet [Table Text Block] + References No definition available. + Details
Name: | aep_ImpactofFairValueHedgesonBalanceSheetTableTextBlock
Namespace Prefix: | aep_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4E -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624181-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959 + Details
Name: | us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959 + Details
Name: | us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of gains and losses on derivative instruments included in an entity's trading activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4F -Subparagraph (a),(b) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624186-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 55 -Paragraph 184 -URI https://asc.fasb.org/extlink&oid=127000641&loc=SL5634876-113961 + Details
Name: | us-gaap_ScheduleOfDerivativeInstrumentsIncludedInTradingActivitiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the notional amounts of outstanding derivative positions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959 + Details
Name: | us-gaap_ScheduleOfNotionalAmountsOfOutstandingDerivativePositionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration