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v3.25.3

BENEFIT PLANS - Narrative (Details) | Sep. 30, 2025 plan
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Retirement Benefits [Abstract] |
Defined benefit plan, number of plans | 2

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- Definition Defined Benefit Plan, Number Of Unfunded Plans + References No definition available. + Details
Name: | aep_DefinedBenefitPlanNumberOfUnfundedPlans
Namespace Prefix: | aep_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration