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v3.25.1

FINANCING ACTIVITIES - Schedule of Maximum, Minimum and Average Interest Rates for Funds Borrowed from and Loaned to the Nonutility Money Pool (Details) - Nonutility | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
AEP Texas |  |
Short-Term Debt [Line Items] |  |
Maximum Interest Rate for Funds Loaned | 4.76% | 5.79%
Minimum Interest Rate for Funds Loaned | 4.64% | 5.66%
Average Interest Rate for Funds Loaned | 4.69% | 5.72%
SWEPCo |  |
Short-Term Debt [Line Items] |  |
Maximum Interest Rate for Funds Loaned | 4.76% | 5.79%
Minimum Interest Rate for Funds Loaned | 4.64% | 5.66%
Average Interest Rate for Funds Loaned | 4.69% | 5.72%

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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
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Namespace Prefix: |
Data Type: | na
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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: |
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