FINANCING ACTIVITIES - Schedule of Maximum, Minimum and Average Interest Rates for Funds Borrowed from and Loaned to the Nonutility Money Pool (Details) - Nonutility	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
AEP Texas
Short-Term Debt [Line Items]
Maximum Interest Rate for Funds Loaned	4.76%	5.79%
Minimum Interest Rate for Funds Loaned	4.64%	5.66%
Average Interest Rate for Funds Loaned	4.69%	5.72%
SWEPCo
Short-Term Debt [Line Items]
Maximum Interest Rate for Funds Loaned	4.76%	5.79%
Minimum Interest Rate for Funds Loaned	4.64%	5.66%
Average Interest Rate for Funds Loaned	4.69%	5.72%