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FINANCING ACTIVITIES - Schedule of Dividend Restrictions (Details) $ in Millions | Dec. 31, 2024 USD ($)
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Dividends Payable [Line Items] |
Restricted Retained Earnings | $ 3,247.9
AEP TEXAS INC. |
Dividends Payable [Line Items] |
Restricted Retained Earnings | 1,109.2
AEP TRANSMISSION COMPANY, LLC |
Dividends Payable [Line Items] |
Restricted Retained Earnings | 0.0
APPALACHIAN POWER COMPANY |
Dividends Payable [Line Items] |
Restricted Retained Earnings | 539.2
INDIANA MICHIGAN POWER COMPANY |
Dividends Payable [Line Items] |
Restricted Retained Earnings | 707.0
OHIO POWER COMPANY |
Dividends Payable [Line Items] |
Restricted Retained Earnings | 0.0
PUBLIC SERVICE COMPANY OF OKLAHOMA |
Dividends Payable [Line Items] |
Restricted Retained Earnings | 267.7
SOUTHWESTERN ELECTRIC POWER COMPANY |
Dividends Payable [Line Items] |
Restricted Retained Earnings | $ 366.5

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- Definition Amount of restricted net assets of subsidiaries that may not be distributed to Parent in the form of a loan, advance or dividend. + References No definition available. + Details
Name: | aep_DividendPaymentRestrictions
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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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
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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
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: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | dei_LegalEntityAxis=aep_IndianaMichiganPowerCompanyMember
Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
Name: | dei_LegalEntityAxis=aep_OhioPowerCompanyMember
Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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