FINANCING ACTIVITIES - Schedule of Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool (Details) - Utility	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
SWEPCo
Short-Term Debt [Line Items]
Maximum Interest Rate	4.76%	5.79%
Minimum Interest Rate	4.64%	5.66%
OPCo
Short-Term Debt [Line Items]
Maximum Interest Rate	4.76%	5.79%
Minimum Interest Rate	4.64%	5.66%
I&M
Short-Term Debt [Line Items]
Maximum Interest Rate	4.76%	5.79%
Minimum Interest Rate	4.64%	5.66%
AEP Texas
Short-Term Debt [Line Items]
Maximum Interest Rate	4.76%	5.79%
Minimum Interest Rate	4.64%	5.66%
APCo
Short-Term Debt [Line Items]
Maximum Interest Rate	4.76%	5.79%
Minimum Interest Rate	4.64%	5.66%
PSO
Short-Term Debt [Line Items]
Maximum Interest Rate	4.76%	5.79%
Minimum Interest Rate	4.64%	5.66%
AEPTCo
Short-Term Debt [Line Items]
Maximum Interest Rate	4.76%	5.79%
Minimum Interest Rate	4.64%	5.66%