STATEMENTS OF INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues [Abstract]
Operating revenue	$ 1,939	$ 2,152	$ 2,426
Operating expenses
Electric fuel and purchased power	588	910	1,157
Operating and maintenance expenses	313	279	317
Demand side management program expenses	20	20	23
Depreciation and amortization	455	368	388
Taxes (other than income taxes)	102	100	107
Workforce Reduction Expense	0	9	0
Total operating expenses	1,478	1,686	1,992
Operating income	461	466	434
Other income (expense), net	12	2	0
Allowance for funds used during construction — equity	17	7	3
Interest charges and financing costs
Interest Expense, Operating and Nonoperating	162	143	143
Allowance for funds used during construction — debt	(9)	(7)	(2)
Total interest charges and financing costs	153	136	141
Income before income taxes	337	339	296
Income taxes	(57)	(45)	(53)
Net income	$ 394	$ 384	$ 349