CONDENSED CONSOLIDATED STATEMENTS OF INCOME - I&M - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
REVENUES
TOTAL REVENUES	$ 5,463.4	$ 5,025.7
EXPENSES
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	1,852.9	1,575.8
Other Operation	752.4	762.3
Maintenance	318.5	317.5
Depreciation and Amortization	833.4	787.1
Taxes Other Than Income Taxes	422.0	410.4
TOTAL EXPENSES	4,179.2	3,853.1
OPERATING INCOME	1,284.2	1,172.6
Other Income (Expense):
Other Income	7.8	13.6
Non-Service Cost Components of Net Periodic Benefit Cost	35.1	45.1
Interest Expense	(494.9)	(435.6)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS	889.5	839.3
Income Tax Expense (Benefit)	125.5	(141.9)
I&M
REVENUES
TOTAL REVENUES	722.2	667.4
EXPENSES
Other Operation	170.9	178.2
Maintenance	60.1	52.4
Depreciation and Amortization	124.0	108.3
Taxes Other Than Income Taxes	26.2	23.3
TOTAL EXPENSES	633.0	546.3
OPERATING INCOME	89.2	121.1
Other Income (Expense):
Other Income	4.6	3.2
Non-Service Cost Components of Net Periodic Benefit Cost	5.2	6.7
Interest Expense	(34.8)	(26.2)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS	64.2	104.8
Income Tax Expense (Benefit)	6.7	(40.2)
NET INCOME	57.5	145.0
I&M | Affiliated Entity
EXPENSES
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	76.0	61.5
I&M | Nonrelated Party
EXPENSES
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	175.8	122.6
Electric Generation, Transmission and Distribution | I&M
REVENUES
TOTAL REVENUES	759.1	657.4
Sales to AEP Affiliates | I&M | Affiliated Entity
REVENUES
TOTAL REVENUES	3.9	2.3
Provision for Refund | I&M | Affiliated Entity
REVENUES
TOTAL REVENUES	(0.7)	(0.5)
Provision for Refund | I&M | Nonrelated Party
REVENUES
TOTAL REVENUES	(58.2)	(9.6)
Other Revenues
REVENUES
TOTAL REVENUES	131.8	125.4
Other Revenues | I&M | Affiliated Entity
REVENUES
TOTAL REVENUES	15.5	15.0
Other Revenues | I&M | Nonrelated Party
REVENUES
TOTAL REVENUES	$ 2.6	$ 2.8