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v3.25.1

RATE MATTERS - FERC Rate Matters (Details) - USD ($) $ in Millions | 1 Months Ended |
--- | --- | ---
Oct. 31, 2023 | Mar. 31, 2025
Independence Energy Connection Project |  |
Public Utilities, General Disclosures [Line Items] |  |
Aep share of independence energy connection capital costs |  | $ 97
Request to Update SWEPCo Generation Depreciation Rates |  |
Public Utilities, General Disclosures [Line Items] |  |
Requested annual revenue requirement | $ 5 |

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- Definition Parent Share of Independence Energy Connection Capital Costs + References No definition available. + Details
Name: | aep_ParentShareOfIndependenceEnergyConnectionCapitalCosts
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Requested Annual Revenue Requirement + References No definition available. + Details
Name: | aep_RequestedAnnualRevenueRequirement
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_PublicUtilitiesGeneralDisclosuresLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | aep_FERCMatterAxis=aep_IndependenceEnergyConnectionProjectMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | aep_FERCMatterAxis=aep_RequestToUpdateSWEPCoGenerationDepreciationRatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |