CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Utility revenues:
Utility revenues, exclusive of alternative revenue programs	$ 1,902	$ 1,746	$ 1,743
Alternative revenue programs	35	5	(34)
Total utility revenues	1,937	1,751	1,709
Non-utility revenues	1	1	1
Total operating revenues	1,938	1,752	1,710
Utility operating expenses:
Resource costs	798	702	736
Other operating expenses	442	414	405
Depreciation and amortization	274	265	253
Taxes other than income taxes	116	110	114
Non-utility operating expenses	2	3	12
Total operating expenses	1,632	1,494	1,520
Income from operations	306	258	190
Interest expense	147	141	118
Interest expense to affiliated trusts	3	3	1
Capitalized interest	(5)	(4)	(4)
Other income-net	(22)	(19)	(63)
Income before income taxes	183	137	138
Income tax expense (benefit)	3	(34)	(17)
Net income	$ 180	$ 171	$ 155
Weighted-average common shares outstanding (thousands), basic	78,725	76,396	72,989
Weighted-average common shares outstanding (thousands), diluted	78,820	76,495	73,093
Earnings per common share:
Basic	$ 2.29	$ 2.24	$ 2.13
Diluted	$ 2.29	$ 2.24	$ 2.12