CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - APCo - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES
Cash Flow Hedges, Net of Tax	$ 23.1	$ (6.2)
Amortization of Pension and OPEB Deferred Costs, Net of Tax	0.3	(0.6)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	23.4	(6.8)
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS	823.6	996.3
APCo
Net Income (Loss)	164.6	136.5
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES
Cash Flow Hedges, Net of Tax	(0.2)	(0.2)
Amortization of Pension and OPEB Deferred Costs, Net of Tax	(0.1)	(0.3)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	(0.3)	(0.5)
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS	$ 164.3	$ 136.0