CONSOLIDATED STATEMENTS OF INCOME - I&M - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
REVENUES
TOTAL REVENUES	$ 19,721.3	$ 18,982.3	$ 19,639.5
EXPENSES
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	5,936.3	6,578.3	7,097.9
Other Operation	3,127.6	2,810.5	2,878.1
Maintenance	1,325.1	1,276.3	1,249.4
Asset Impairments and Other Related Charges	142.5	85.6	48.8
Depreciation and Amortization	3,289.9	3,090.4	3,202.8
Taxes Other Than Income Taxes	1,596.3	1,492.3	1,469.8
TOTAL EXPENSES	15,417.7	15,426.1	16,156.8
OPERATING INCOME	4,303.6	3,556.2	3,482.7
Other Income (Expense):
Other Income	65.1	63.4	11.6
Non-Service Cost Components of Net Periodic Benefit Cost	126.0	221.1	188.5
Interest Expense	(1,862.8)	(1,806.9)	(1,396.1)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS (LOSS)	2,842.9	2,208.7	2,420.4
Income Tax Expense (Benefit)	(39.2)	54.6	5.4
INDIANA MICHIGAN POWER COMPANY
REVENUES
TOTAL REVENUES	2,572.0	2,535.9	2,669.6
EXPENSES
Other Operation	728.2	662.8	621.0
Maintenance	235.4	238.7	227.2
Asset Impairments and Other Related Charges	13.4	0.0	0.0
Depreciation and Amortization	481.1	470.0	527.2
Taxes Other Than Income Taxes	89.2	84.2	97.0
TOTAL EXPENSES	2,172.8	2,048.2	2,249.7
OPERATING INCOME	399.2	487.7	419.9
Other Income (Expense):
Other Income	12.7	12.5	9.3
Non-Service Cost Components of Net Periodic Benefit Cost	17.8	31.0	24.9
Interest Expense	(133.5)	(136.7)	(125.2)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS (LOSS)	296.2	394.5	328.9
Income Tax Expense (Benefit)	(95.2)	58.6	4.2
NET INCOME	391.4	335.9	324.7
INDIANA MICHIGAN POWER COMPANY | Affiliated Entity
EXPENSES
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	208.9	181.2	241.8
INDIANA MICHIGAN POWER COMPANY | Nonrelated Party
EXPENSES
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	416.6	411.3	535.5
Electric Generation, Transmission and Distribution Revenues | INDIANA MICHIGAN POWER COMPANY
REVENUES
TOTAL REVENUES	2,552.3	2,469.0	2,613.7
Sales to AEP Affiliates | INDIANA MICHIGAN POWER COMPANY | Affiliated Entity
REVENUES
TOTAL REVENUES	15.4	9.3	17.8
Provision for Refund | INDIANA MICHIGAN POWER COMPANY | Affiliated Entity
REVENUES
TOTAL REVENUES	(13.7)	(10.5)	(2.5)
Provision for Refund | INDIANA MICHIGAN POWER COMPANY | Nonrelated Party
REVENUES
TOTAL REVENUES	(56.8)	(3.2)	(25.4)
Other Revenues
REVENUES
TOTAL REVENUES	483.0	458.1	408.2
Other Revenues | INDIANA MICHIGAN POWER COMPANY | Affiliated Entity
REVENUES
TOTAL REVENUES	64.5	59.0	54.3
Other Revenues | INDIANA MICHIGAN POWER COMPANY | Nonrelated Party
REVENUES
TOTAL REVENUES	$ 10.3	$ 12.3	$ 11.7