FINANCING ACTIVITIES - Schedule of Dividend Restrictions (Details) $ in Millions	Dec. 31, 2025 USD ($)
Dividends Payable [Line Items]
Restricted Retained Earnings	$ 2,690
AEP Texas
Dividends Payable [Line Items]
Restricted Retained Earnings	904
AEPTCo
Dividends Payable [Line Items]
Restricted Retained Earnings	0
APCo
Dividends Payable [Line Items]
Restricted Retained Earnings	901
I&M
Dividends Payable [Line Items]
Restricted Retained Earnings	663
OPCo
Dividends Payable [Line Items]
Restricted Retained Earnings	0
PSO
Dividends Payable [Line Items]
Restricted Retained Earnings	17
SWEPCo
Dividends Payable [Line Items]
Restricted Retained Earnings	$ 0

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.

No definition available.

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