FINANCING ACTIVITIES - Schedule of Maximum, Minimum and Average Interest Rates for Funds Borrowed from and Loaned to the Nonutility Money Pool (Details) - Nonutility	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
AEP TEXAS INC.
Short-Term Debt [Line Items]
Maximum Interest Rate for Funds Loaned	5.79%	5.81%	5.28%
Minimum Interest Rate for Funds Loaned	4.74%	4.66%	0.46%
Average Interest Rate for Funds Loaned	5.46%	5.54%	2.23%
SOUTHWESTERN ELECTRIC POWER COMPANY
Short-Term Debt [Line Items]
Maximum Interest Rate for Funds Loaned	5.79%	5.81%	5.28%
Minimum Interest Rate for Funds Loaned	4.74%	4.66%	0.46%
Average Interest Rate for Funds Loaned	5.45%	5.56%	2.23%