CONDENSED CONSOLIDATED STATEMENTS OF INCOME - I&M - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
REVENUES
TOTAL REVENUES	$ 6,010.4	$ 5,420.1	$ 16,560.7	$ 15,025.0
EXPENSES
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	1,980.2	1,659.2	5,374.5	4,603.5
Other Operation	797.8	805.8	2,087.8	2,385.4
Maintenance	405.1	343.7	1,114.3	1,012.7
Asset Impairments and Other Related Charges	0.0	0.0	0.0	142.5
Depreciation and Amortization	879.6	852.7	2,566.1	2,461.7
Taxes Other Than Income Taxes	426.3	407.2	1,213.3	1,211.2
TOTAL EXPENSES	4,489.0	4,068.6	12,356.0	11,817.0
OPERATING INCOME	1,521.4	1,351.5	4,204.7	3,208.0
Other Income (Expense):
Other Income	12.1	28.5	35.4	55.2
Non-Service Cost Components of Net Periodic Benefit Cost	34.4	46.5	104.1	129.0
Interest Expense	(508.5)	(498.8)	(1,492.9)	(1,400.0)
INCOME (LOSS) BEFORE INCOME TAX EXPENSE (BENEFIT)	1,117.9	981.9	3,024.2	2,145.2
Income Tax Expense	138.7	37.5	13.3	(97.7)
Nonrelated Party
REVENUES
TOTAL REVENUES	6,010.4	5,420.1	16,560.7	15,025.0
I&M
REVENUES
TOTAL REVENUES	812.2	733.5	2,271.6	1,995.2
EXPENSES
Other Operation	188.8	180.0	537.2	548.5
Maintenance	70.8	58.1	218.7	173.7
Asset Impairments and Other Related Charges	0.0	0.0	0.0	13.4
Depreciation and Amortization	133.7	132.6	386.4	359.2
Taxes Other Than Income Taxes	23.0	21.0	70.8	68.9
TOTAL EXPENSES	646.0	572.9	1,893.4	1,659.6
OPERATING INCOME	166.2	160.6	378.2	335.6
Other Income (Expense):
Other Income	5.6	3.3	14.0	9.7
Non-Service Cost Components of Net Periodic Benefit Cost	4.8	6.8	15.2	20.0
Interest Expense	(38.0)	(35.7)	(111.7)	(98.9)
INCOME (LOSS) BEFORE INCOME TAX EXPENSE (BENEFIT)	138.6	135.0	295.7	266.4
Income Tax Expense	(11.1)	(44.1)	(35.6)	(92.9)
NET INCOME	149.7	179.1	331.3	359.3
I&M | Affiliated Entity
EXPENSES
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	71.9	63.0	214.3	169.0
I&M | Nonrelated Party
EXPENSES
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	157.8	118.2	466.0	326.9
Electric Generation, Transmission and Distribution | I&M
REVENUES
TOTAL REVENUES	841.2	727.2	2,335.9	1,959.5
Sales to AEP Affiliates | I&M | Affiliated Entity
REVENUES
TOTAL REVENUES	3.9	2.2	9.3	9.9
(Provision for)/Reversal of – Revenue Refund | I&M | Affiliated Entity
REVENUES
TOTAL REVENUES	0.0	(0.9)	8.5	(4.7)
(Provision for)/Reversal of – Revenue Refund | I&M | Nonrelated Party
REVENUES
TOTAL REVENUES	(51.0)	(12.3)	(134.9)	(27.2)
Other Revenues
REVENUES
TOTAL REVENUES	125.2	119.1	415.8	380.4
Other Revenues | I&M | Affiliated Entity
REVENUES
TOTAL REVENUES	16.9	15.2	46.8	50.7
Other Revenues | I&M | Nonrelated Party
REVENUES
TOTAL REVENUES	$ 1.2	$ 2.1	$ 6.0	$ 7.0