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FINANCING ACTIVITIES - Schedule of Comparative Accounts Receivable Information (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Debt Disclosure [Abstract] |  |
Effective Interest Rates on Securitization of Accounts Receivable | 4.62% | 5.61%
Net Uncollectible Accounts Receivable Written-Off | $ 7.8 | $ 8.1

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- Definition Effective interest rate on the amount owed for securitized accounts receivables. + References No definition available. + Details
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Namespace Prefix: | aep_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Net uncollectible accounts receivable written off. + References No definition available. + Details
Name: | aep_NetUncollectibleAccountsReceivableWrittenOff
Namespace Prefix: | aep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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