CONDENSED CONSOLIDATED STATEMENTS OF INCOME - SWEPCo - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
REVENUES
TOTAL REVENUES	$ 6,020	$ 5,463
EXPENSES
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	2,118	1,853
Other Operation	750	752
Maintenance	411	319
Asset Impairments and Other Related Charges	31	0
Depreciation and Amortization	907	833
Taxes Other Than Income Taxes	443	422
TOTAL EXPENSES	4,660	4,179
OPERATING INCOME	1,360	1,284
Other Income (Expense):
Allowance for Equity Funds Used During Construction	70	57
Non-Service Cost Components of Net Periodic Benefit Cost	38	35
Interest Expense	(552)	(495)
INCOME (LOSS) BEFORE INCOME TAX EXPENSE (BENEFIT)	922	889
Income Tax Expense (Benefit)	44	125
NET INCOME	903	802
Net Income Attributable to Noncontrolling Interests	29	2
EARNINGS ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS, Basic	874	800
EARNINGS ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS, Diluted	874	800
SOUTHWESTERN ELECTRIC POWER COMPANY
REVENUES
TOTAL REVENUES	571	531
EXPENSES
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	171	191
Other Operation	118	97
Maintenance	46	35
Asset Impairments and Other Related Charges	31	0
Depreciation and Amortization	121	98
Taxes Other Than Income Taxes	37	35
TOTAL EXPENSES	524	456
OPERATING INCOME	47	75
Other Income (Expense):
Interest Income	2	2
Allowance for Equity Funds Used During Construction	8	3
Non-Service Cost Components of Net Periodic Benefit Cost	1	2
Interest Expense	(50)	(39)
INCOME (LOSS) BEFORE INCOME TAX EXPENSE (BENEFIT)	8	43
Income Tax Expense (Benefit)	(49)	(6)
NET INCOME	57	49
Net Income Attributable to Noncontrolling Interests	1	1
EARNINGS ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS, Basic	56	48
EARNINGS ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS, Diluted	56	48
Electric Generation, Transmission and Distribution | SOUTHWESTERN ELECTRIC POWER COMPANY
REVENUES
TOTAL REVENUES	548	517
Sales to AEP Affiliates | SOUTHWESTERN ELECTRIC POWER COMPANY
REVENUES
TOTAL REVENUES	22	11
Other Revenues
REVENUES
TOTAL REVENUES	130	132
Other Revenues | SOUTHWESTERN ELECTRIC POWER COMPANY
REVENUES
TOTAL REVENUES	$ 1	$ 3