CONDENSED CONSOLIDATED STATEMENTS OF INCOME - AEP Transmission Holdco - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
REVENUES
TOTAL REVENUES	$ 5,463.4	$ 5,025.7
EXPENSES
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):
Allowance for Equity Funds Used During Construction	57.3	43.6
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)
AEPTCo
REVENUES
TOTAL REVENUES	527.1	482.8
EXPENSES
Other Operation	29.0	29.9
Maintenance	5.4	5.3
Depreciation and Amortization	114.1	105.9
Taxes Other Than Income Taxes	74.1	73.4
TOTAL EXPENSES	222.6	214.5
OPERATING INCOME	304.5	268.3
Other Income (Expense):
Interest Income	0.4	1.9
Allowance for Equity Funds Used During Construction	22.4	17.9
Interest Expense	(55.0)	(54.8)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS	272.3	233.3
Income Tax Expense (Benefit)	60.8	52.1
NET INCOME	211.5	181.2
AEPTCo | Affiliated Entity
REVENUES
TOTAL REVENUES	422.8	383.4
AEPTCo | Nonrelated Party
REVENUES
TOTAL REVENUES	104.3	97.0
Transmission Revenues | AEPTCo
REVENUES
TOTAL REVENUES	106.0	98.4
Sales to AEP Affiliates | AEPTCo | Affiliated Entity
REVENUES
TOTAL REVENUES	430.2	389.4
Provision for Refund | AEPTCo | Affiliated Entity
REVENUES
TOTAL REVENUES	(7.4)	(6.0)
Provision for Refund | AEPTCo | Nonrelated Party
REVENUES
TOTAL REVENUES	(1.7)	(1.4)
Other Revenues
REVENUES
TOTAL REVENUES	131.8	125.4
Other Revenues | AEPTCo
REVENUES
TOTAL REVENUES	$ 0.0	$ 2.4