STATEMENTS OF INCOME - PSO - 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
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
PUBLIC SERVICE COMPANY OF OKLAHOMA
REVENUES
TOTAL REVENUES	2,022	1,846	1,977
EXPENSES
Purchased Electricity, Fuel and Other Consumables Used for Electric Generation	752	743	955
Other Operation	501	416	356
Maintenance	129	113	112
Depreciation and Amortization	260	272	256
Taxes Other Than Income Taxes	79	77	64
TOTAL EXPENSES	1,721	1,621	1,743
OPERATING INCOME	301	225	234
Other Income (Expense):
Interest Income	2	2	2
Allowance for Equity Funds Used During Construction	11	7	8
Non-Service Cost Components of Net Periodic Benefit Cost	8	11	14
Interest Expense	(140)	(96)	(103)
INCOME BEFORE INCOME TAX EXPENSE (BENEFIT) AND EQUITY EARNINGS	182	149	155
Income Tax Expense	(70)	(100)	(54)
NET INCOME	252	249	209
Electric Generation, Transmission and Distribution Revenues | PUBLIC SERVICE COMPANY OF OKLAHOMA
REVENUES
TOTAL REVENUES	2,002	1,820	1,968
Sales to AEP Affiliates | PUBLIC SERVICE COMPANY OF OKLAHOMA
REVENUES
TOTAL REVENUES	9	7	1
Other Revenues
REVENUES
TOTAL REVENUES	526	482	458
Other Revenues | PUBLIC SERVICE COMPANY OF OKLAHOMA
REVENUES
TOTAL REVENUES	$ 11	$ 19	$ 8