FINANCING ACTIVITIES - Issuances of Debt (Details) $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($)
Debt Instrument [Line Items]
Total Issuances	$ 562.0
Other Long-term Debt | AEP Texas
Debt Instrument [Line Items]
Total Issuances	400.0
Other Long-term Debt | KPCo
Debt Instrument [Line Items]
Total Issuances	150.0
Other Long-term Debt | Transource Energy
Debt Instrument [Line Items]
Total Issuances	$ 12.0