CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating revenues
Electric, non-affiliates	$ 779	$ 815	$ 800
Electric, affiliates	216	204	202
Natural gas	135	157	198
Other	1	1	1
Total operating revenues	1,131	1,177	1,201
Operating expenses
Electric fuel and purchased power, non-affiliates	13	14	17
Purchased power, affiliates	384	408	446
Cost of natural gas sold and transported	55	80	116
Operating and maintenance expenses	230	239	223
Conservation program expenses	12	13	13
Depreciation and amortization	186	170	158
Taxes (other than income taxes)	35	34	31
Workforce Reduction Expense	0	5	0
Total operating expenses	915	963	1,004
Operating income	216	214	197
Other Income and Expenses [Abstract]
Other income (expense), net	3	2	(2)
Allowance for funds used during construction — equity	16	10	7
Interest charges and financing costs
Interest charges and other financing costs	68	54	45
Allowance for funds used during construction — debt	(7)	(4)	(3)
Total interest charges and financing costs	61	50	42
Income before income taxes	174	176	160
Income tax expense	40	40	35
Net income	$ 134	$ 136	$ 125