CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating revenues
Electric	$ 3,413	$ 3,116	$ 3,033
Natural gas	1,355	1,024	1,161
Other	47	43	43
Total operating revenues	4,815	4,183	4,237
Operating expenses
Electric fuel and purchased power	1,336	1,132	1,083
Cost of natural gas sold and transported	606	374	526
Cost of sales — steam and other	15	13	17
Operating and maintenance expenses	831	811	810
Demand side management expenses	132	141	136
Depreciation and amortization	744	655	602
Taxes (other than income taxes)	256	234	206
Total operating expenses	3,920	3,360	3,380
Operating income	895	823	857
Other income (expense), net	4	(1)	3
Allowance for funds used during construction — equity	28	35	22
Interest charges and financing costs
Interest charges — includes other financing costs of $8, $7 and $7, respectively	(243)	(238)	(235)
Allowance for funds used during construction — debt	(9)	(14)	(11)
Total interest charges and financing costs	234	224	224
Income before income taxes	693	633	658
Income tax expense	33	45	80
Net income	660	588	578
Other financing costs	$ 8	$ 7	$ 7