CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating revenues
Electric	$ 3,795	$ 3,413	$ 3,116
Natural gas	1,860	1,355	1,024
Other	53	47	43
Total operating revenues	5,708	4,815	4,183
Operating expenses
Electric fuel and purchased power	1,485	1,336	1,132
Cost of natural gas sold and transported	1,053	606	374
Cost of sales — steam and other	18	15	13
Operating and maintenance expenses	905	831	811
Demand side management expenses	133	132	141
Depreciation and amortization	848	744	655
Taxes (other than income taxes)	272	256	234
Total operating expenses	4,714	3,920	3,360
Operating income	994	895	823
Other (expense) income, net	(2)	4	(1)
Allowance for funds used during construction — equity	32	28	35
Interest charges and financing costs
Interest charges — includes other financing costs of $8, $8 and $7, respectively	(271)	(243)	(238)
Allowance for funds used during construction — debt	(11)	(9)	(14)
Total interest charges and financing costs	260	234	224
Income before income taxes	764	693	633
Income tax expense	37	33	45
Net income	$ 727	$ 660	$ 588