CONDENSED CONSOLIDATED STATEMENTS OF INCOME - AEP Transmission Holdco - 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
Other Operation	797.8	805.8	2,087.8	2,385.4
Maintenance	405.1	343.7	1,114.3	1,012.7
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):
Allowance for Equity Funds Used During Construction	58.5	54.2	172.9	153.0
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 (Benefit)	138.7	37.5	13.3	(97.7)
NET INCOME	1,000.3	961.7	3,090.8	2,309.9
Net Income Attributable to Noncontrolling Interest	28.3	2.1	92.8	6.9
EARNINGS (LOSS) ATTRIBUTABLE TO COMMON SHAREHOLDERS, Basic	972.0	959.6	2,998.0	2,303.0
EARNINGS (LOSS) ATTRIBUTABLE TO COMMON SHAREHOLDERS, Diluted	972.0	959.6	2,998.0	2,303.0
Nonrelated Party
REVENUES
TOTAL REVENUES	6,010.4	5,420.1	16,560.7	15,025.0
AEPTCo
REVENUES
TOTAL REVENUES	558.0	497.2	1,826.9	1,455.2
EXPENSES
Other Operation	41.3	31.7	106.1	101.6
Maintenance	8.6	5.7	20.4	16.0
Depreciation and Amortization	121.3	108.2	354.3	320.8
Taxes Other Than Income Taxes	85.9	79.7	235.8	228.6
TOTAL EXPENSES	257.1	225.3	716.6	667.0
OPERATING INCOME	300.9	271.9	1,110.3	788.2
Other Income (Expense):
Interest Income	1.3	3.1	3.1	9.3
Allowance for Equity Funds Used During Construction	20.8	24.3	64.7	64.7
Interest Expense	(61.3)	(54.3)	(172.9)	(160.5)
INCOME (LOSS) BEFORE INCOME TAX EXPENSE (BENEFIT)	261.7	245.0	1,005.2	701.7
Income Tax Expense (Benefit)	56.2	53.7	(28.3)	153.5
NET INCOME	205.5	191.3	1,033.5	548.2
Net Income Attributable to Noncontrolling Interest	26.6	0.0	87.3	0.0
EARNINGS (LOSS) ATTRIBUTABLE TO COMMON SHAREHOLDERS, Basic	178.9	191.3	946.2	548.2
EARNINGS (LOSS) ATTRIBUTABLE TO COMMON SHAREHOLDERS, Diluted	178.9	191.3	946.2	548.2
AEPTCo | Affiliated Entity
REVENUES
TOTAL REVENUES	450.1	395.9	1,470.0	1,157.1
AEPTCo | Nonrelated Party
REVENUES
TOTAL REVENUES	107.9	101.1	356.8	295.1
Transmission Revenues | AEPTCo
REVENUES
TOTAL REVENUES	107.9	103.3	324.6	299.0
Sales to AEP Affiliates | AEPTCo | Affiliated Entity
REVENUES
TOTAL REVENUES	450.1	404.4	1,350.2	1,188.2
(Provision for)/Reversal of – Revenue Refund | AEPTCo | Affiliated Entity
REVENUES
TOTAL REVENUES	0.0	(8.5)	119.8	(31.1)
(Provision for)/Reversal of – Revenue Refund | AEPTCo | Nonrelated Party
REVENUES
TOTAL REVENUES	0.0	(2.2)	32.2	(3.9)
Other Revenues
REVENUES
TOTAL REVENUES	125.2	119.1	415.8	380.4
Other Revenues | AEPTCo
REVENUES
TOTAL REVENUES	$ 0.0	$ 0.2	$ 0.1	$ 3.0