CONDENSED STATEMENTS OF INCOME - PSO - 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
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	44	125
PUBLIC SERVICE COMPANY OF OKLAHOMA
REVENUES
TOTAL REVENUES	439	394
EXPENSES
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	164	129
Other Operation	127	101
Maintenance	39	28
Depreciation and Amortization	73	69
Taxes Other Than Income Taxes	23	18
TOTAL EXPENSES	426	345
OPERATING INCOME	13	49
Other Income (Expense):
Interest Income	0	2
Allowance for Equity Funds Used During Construction	3	3
Non-Service Cost Components of Net Periodic Benefit Cost	2	2
Interest Expense	(43)	(30)
INCOME (LOSS) BEFORE INCOME TAX EXPENSE (BENEFIT)	(25)	26
Income Tax Expense	(40)	(2)
NET INCOME	15	28
Electric Generation, Transmission and Distribution | PUBLIC SERVICE COMPANY OF OKLAHOMA
REVENUES
TOTAL REVENUES	434	390
Sales to AEP Affiliates | PUBLIC SERVICE COMPANY OF OKLAHOMA
REVENUES
TOTAL REVENUES	4	1
Other Revenues
REVENUES
TOTAL REVENUES	130	132
Other Revenues | PUBLIC SERVICE COMPANY OF OKLAHOMA
REVENUES
TOTAL REVENUES	$ 1	$ 3