CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - I&M - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES
Amortization of Pension and OPEB Deferred Costs, Net of Tax	$ 1	$ (3)	$ (13)
Pension and OPEB Funded Status, Net of Tax	63	41	(16)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	39	52	(139)
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS	3,619	3,019	2,069
INDIANA MICHIGAN POWER COMPANY
Net Income	414	391	336
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES
Amortization of Pension and OPEB Deferred Costs, Net of Tax	0	0	(1)
Pension and OPEB Funded Status, Net of Tax	2	1	1
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	2	1	0
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS	$ 416	$ 392	$ 336