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FINANCING ACTIVITIES - Schedule of Maximum, Minimum and Average Interest Rates for Funds Borrowed from and Loaned to the Nonutility Money Pool (Details) - Nonutility | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
AEP TEXAS INC. |  |  |
Short-Term Debt [Line Items] |  |  |
Maximum Interest Rate for Funds Loaned | 5.79% | 5.81% | 5.28%
Minimum Interest Rate for Funds Loaned | 4.74% | 4.66% | 0.46%
Average Interest Rate for Funds Loaned | 5.46% | 5.54% | 2.23%
SOUTHWESTERN ELECTRIC POWER COMPANY |  |  |
Short-Term Debt [Line Items] |  |  |
Maximum Interest Rate for Funds Loaned | 5.79% | 5.81% | 5.28%
Minimum Interest Rate for Funds Loaned | 4.74% | 4.66% | 0.46%
Average Interest Rate for Funds Loaned | 5.45% | 5.56% | 2.23%

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- Definition The average interest rate for funds loaned to a Money Pool during the period. The Money Pool represents centralized funding mechanism AEP uses to meet the short-term cash requirements of certain subsidiaries. + References No definition available. + Details
Name: | aep_AverageInterestRateForFundsLoaned
Namespace Prefix: | aep_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition The maximum weighted-average interest rate of funds outstanding at that time, calculated on a daily basis, loaned during the period. + References No definition available. + Details
Name: | aep_MaximumInterestRateForFundsLoaned
Namespace Prefix: | aep_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition The minimum weighted-average interest rate of funds outstanding at that time, calculated on a daily basis, loaned during the period. + References No definition available. + Details
Name: | aep_MinimumInterestRateforFundsLoaned
Namespace Prefix: | aep_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ShortTermDebtLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | aep_MoneyPoolParticipantbyCompanyTypeAxis=aep_NonutilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | dei_LegalEntityAxis=aep_AEPTexasInc.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | dei_LegalEntityAxis=aep_SouthwesternElectricPowerCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |