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FINANCING ACTIVITIES - Schedule of Average Interest Rates for Funds Borrowed from and Loaned to Utility Money Pool (Details) - Utility | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
AEP TEXAS INC. |  |  |
Short-Term Debt [Line Items] |  |  |
Average Interest Rate for Funds Borrowed | 5.48% | 5.46% | 1.08%
Average Interest Rate for Funds Loaned | 5.45% | 5.71% | 1.99%
AEP TRANSMISSION COMPANY, LLC |  |  |
Short-Term Debt [Line Items] |  |  |
Average Interest Rate for Funds Borrowed | 5.51% | 5.41% | 1.81%
Average Interest Rate for Funds Loaned | 5.50% | 5.56% | 2.47%
APPALACHIAN POWER COMPANY |  |  |
Short-Term Debt [Line Items] |  |  |
Average Interest Rate for Funds Borrowed | 5.51% | 5.54% | 2.34%
Average Interest Rate for Funds Loaned | 5.41% | 5.54% | 2.39%
INDIANA MICHIGAN POWER COMPANY |  |  |
Short-Term Debt [Line Items] |  |  |
Average Interest Rate for Funds Borrowed | 5.40% | 5.14% | 2.57%
Average Interest Rate for Funds Loaned | 5.44% | 5.57% | 2.20%
OHIO POWER COMPANY |  |  |
Short-Term Debt [Line Items] |  |  |
Average Interest Rate for Funds Borrowed | 5.70% | 5.43% | 3.51%
Average Interest Rate for Funds Loaned | 5.20% | 5.60% | 1.22%
PUBLIC SERVICE COMPANY OF OKLAHOMA |  |  |
Short-Term Debt [Line Items] |  |  |
Average Interest Rate for Funds Borrowed | 5.50% | 5.51% | 2.65%
Average Interest Rate for Funds Loaned | 4.79% | 5.35% | 0.75%
SOUTHWESTERN ELECTRIC POWER COMPANY |  |  |
Short-Term Debt [Line Items] |  |  |
Average Interest Rate for Funds Borrowed | 5.41% | 5.34% | 2.80%
Average Interest Rate for Funds Loaned | 4.78% | 5.72% | 0.55%

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- 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-types1:percentItemType
Balance Type: | na
Period Type: | duration

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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 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_UtilityMember
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_AEPTransmissionCompanyLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | dei_LegalEntityAxis=aep_AppalachianPowerCompanyMember
Namespace Prefix: |
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- Details
Name: | dei_LegalEntityAxis=aep_IndianaMichiganPowerCompanyMember
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Data Type: | na
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- Details
Name: | dei_LegalEntityAxis=aep_OhioPowerCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
Name: | dei_LegalEntityAxis=aep_PublicServiceCompanyOfOklahomaMember
Namespace Prefix: |
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- Details
Name: | dei_LegalEntityAxis=aep_SouthwesternElectricPowerCompanyMember
Namespace Prefix: |
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Period Type: |