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v3.25.3

RATE MATTERS - Ohio Legislation (Details) $ in Millions | 3 Months Ended
--- | ---
Sep. 30, 2025 USD ($)
OPCo | OVEC-Related Purchased Power |
Public Utilities, General Disclosures [Line Items] |
Estimated reduction related to deferred costs no longer recoverable | $ 24

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- Definition Regulatory Asset, Estimated Reduction Related To Deferred Costs No Longer Recoverable + References No definition available. + Details
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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
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RegulatoryAssetAxis=aep_OVECRelatedPurchasedPowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |