FINANCING ACTIVITIES - Schedule of Maximum Minimum and Average Interest Rates for Funds Borrowed from and Loaned to AEP (Details) - Direct Borrowing - AEPTCo	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Short-Term Debt [Line Items]
Maximum Interest Rate for Funds Borrowed	4.76%	5.79%
Minimum Interest Rate For Funds Borrowed	4.27%	5.25%
Maximum Interest Rate for Funds Loaned	4.76%	5.79%
Minimum Interest Rate for Funds Loaned	4.27%	5.25%
Average Interest Rate for Funds Borrowed	4.64%	5.66%
Average Interest Rate for Funds Loaned	4.64%	5.63%