CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - I&M - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES
Cash Flow Hedges, Net of Tax	$ 5.0	$ (127.0)	$ 81.4
Amortization of Pension and OPEB Deferred Costs, Net of Tax	(2.5)	(12.6)	(10.4)
Pension and OPEB Funded Status, Net of Tax	41.0	(16.3)	(155.4)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	52.4	(139.2)	(101.1)
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS	3,019.5	2,068.9	2,206.1
INDIANA MICHIGAN POWER COMPANY
Net Income	391.4	335.9	324.7
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES
Cash Flow Hedges, Net of Tax	0.4	(0.4)	1.6
Amortization of Pension and OPEB Deferred Costs, Net of Tax	(0.2)	(0.9)	(0.3)
Pension and OPEB Funded Status, Net of Tax	0.6	1.0	(0.3)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	0.8	(0.3)	1.0
TOTAL COMPREHENSIVE INCOME ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS	$ 392.2	$ 335.6	$ 325.7