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FINANCING ACTIVITIES - Schedule of Maximum Minimum and Average Interest Rates for Funds Borrowed from and Loaned to AEP (Details) - Direct Borrowing - AEPTCo | 6 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024
Short-Term Debt [Line Items] |  |
Maximum Interest Rate for Funds Borrowed | 4.76% | 5.79%
Minimum Interest Rate For Funds Borrowed | 4.63% | 5.55%
Maximum Interest Rate for Funds Loaned | 4.76% | 5.79%
Minimum Interest Rate for Funds Loaned | 4.63% | 5.55%
Average Interest Rate for Funds Borrowed | 4.69% | 5.68%
Average Interest Rate for Funds Loaned | 4.69% | 5.68%

X
- Definition The average interest rate for funds borrowed from 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_AverageInterestRateForFundsBorrowed
Namespace Prefix: | aep_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- 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-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- 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-types:percentItemType
Balance Type: | na
Period Type: | duration

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

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

X
- 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-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- 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

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

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