CONSOLIDATED STATEMENTS OF INCOME - SWEPCo - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
REVENUES
TOTAL REVENUES	$ 21,876	$ 19,721	$ 18,982
EXPENSES
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	7,031	5,936	6,578
Other Operation	2,950	3,127	2,811
Maintenance	1,499	1,325	1,276
Asset Impairments and Other Related Charges	66	143	86
Depreciation and Amortization	3,380	3,290	3,090
Taxes Other Than Income Taxes	1,631	1,596	1,492
TOTAL EXPENSES	16,557	15,417	15,426
OPERATING INCOME	5,319	4,304	3,556
Other Income (Expense):
Allowance for Equity Funds Used During Construction	245	211	175
Non-Service Cost Components of Net Periodic Benefit Cost	138	126	221
Interest Expense	(2,026)	(1,863)	(1,807)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS	3,724	2,843	2,209
Income Tax Expense	129	(39)	55
Equity Earnings of Unconsolidated Subsidiaries	101	94	59
NET INCOME	3,696	2,976	2,213
Net Income Attributable to Noncontrolling Interests	116	9	5
EARNINGS ATTRIBUTABLE TO AEP MEMBER, Basic	3,580	2,967	2,208
EARNINGS ATTRIBUTABLE TO AEP MEMBER, Diluted	3,580	2,967	2,208
Nonrelated Party
REVENUES
TOTAL REVENUES	21,876	19,721	18,982
SOUTHWESTERN ELECTRIC POWER COMPANY
REVENUES
TOTAL REVENUES	2,354	2,036	2,183
EXPENSES
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	727	733	807
Other Operation	458	423	361
Maintenance	194	149	159
Asset Impairments and Other Related Charges	6	0	86
Depreciation and Amortization	429	389	343
Taxes Other Than Income Taxes	129	125	135
TOTAL EXPENSES	1,943	1,819	1,891
OPERATING INCOME	411	217	292
Other Income (Expense):
Interest Income	11	14	19
Allowance for Equity Funds Used During Construction	23	14	11
Non-Service Cost Components of Net Periodic Benefit Cost	7	1	14
Interest Expense	(157)	(106)	(147)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS	295	140	189
Income Tax Expense	(95)	(184)	(33)
Equity Earnings of Unconsolidated Subsidiaries	1	2	2
NET INCOME	391	326	224
Net Income Attributable to Noncontrolling Interests	3	5	4
EARNINGS ATTRIBUTABLE TO AEP MEMBER, Basic	388	321	220
EARNINGS ATTRIBUTABLE TO AEP MEMBER, Diluted	388	321	220
Electric Generation, Transmission and Distribution Revenues | SOUTHWESTERN ELECTRIC POWER COMPANY
REVENUES
TOTAL REVENUES	2,281	2,149	2,155
Sales to AEP Affiliates | SOUTHWESTERN ELECTRIC POWER COMPANY
REVENUES
TOTAL REVENUES	71	71	82
(Provision For) Reversal Of Refund | SOUTHWESTERN ELECTRIC POWER COMPANY | Affiliated Entity
REVENUES
TOTAL REVENUES	12	(9)	(35)
Provision for Refund | SOUTHWESTERN ELECTRIC POWER COMPANY | Nonrelated Party
REVENUES
TOTAL REVENUES	(20)	(182)	(21)
Other Revenues
REVENUES
TOTAL REVENUES	526	482	458
Other Revenues | SOUTHWESTERN ELECTRIC POWER COMPANY
REVENUES
TOTAL REVENUES	$ 10	$ 7	$ 2