STATEMENTS OF INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenues [Abstract]
Operating revenue	$ 2,180	$ 1,939	$ 2,152
Operating expenses
Electric fuel and purchased power	756	588	910
Operating and maintenance expenses	343	313	279
Demand side management program expenses	21	20	20
Depreciation and amortization	464	455	368
Taxes (other than income taxes)	104	102	100
Workforce Reduction Expense	0	0	9
Total operating expenses	1,688	1,478	1,686
Operating income	492	461	466
Other income (expense), net	9	12	2
Allowance for funds used during construction — equity	31	17	7
Interest charges and financing costs
Interest Expense, Operating and Nonoperating	195	162	143
Allowance for funds used during construction — debt	(18)	(9)	(7)
Total interest charges and financing costs	177	153	136
Income before income taxes	355	337	339
Income taxes	(40)	(57)	(45)
Net income	$ 395	$ 394	$ 384