CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024
Statement of Comprehensive Income [Abstract]
Net Income	$ 1,000.3	$ 1,288.3	$ 802.2	$ 961.7	$ 342.5	$ 1,005.7	$ 3,090.8	$ 2,309.9
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES
Cash Flow Hedges, Net of Tax	(15.4)			(46.3)			(25.5)	(30.1)
Amortization of Pension and OPEB Deferred Costs, Net of Tax	0.2			(0.6)			0.8	(1.3)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	(15.2)	$ (32.9)	$ 23.4	(46.9)	$ 22.3	$ (6.8)	(24.7)	(31.4)
TOTAL COMPREHENSIVE INCOME	985.1			914.8			3,066.1	2,278.5
Total Comprehensive Income Attributable To Noncontrolling Interests	28.3			2.1			92.8	6.9
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS	$ 956.8			$ 912.7			$ 2,973.3	$ 2,271.6