FINANCING ACTIVITIES - Securitized Accounts Receivables Narrative (Details) $ in Millions	Mar. 31, 2026 USD ($)
Debt Disclosure [Abstract]
Total commitment from bank conduits to finance receivables	$ 900

Total commitment from bank conduits to finance receivables.

No definition available.

Name:	aep_TotalCommitmentFromBankConduitsToFinanceReceivables
Namespace Prefix:	aep_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant