CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating revenues
Electric, non-affiliates	$ 204	$ 203
Electric, affiliates	50	47
Natural gas	77	78
Total operating revenues	331	328
Operating expenses
Electric fuel and purchased power, non-affiliates	4	4
Purchased power, affiliates	103	108
Cost of natural sold and transported	46	45
Operating and maintenance expenses	58	53
Conservation program expenses	3	3
Depreciation and amortization	41	38
Taxes (other than income taxes)	8	8
Total operating expenses	263	259
Operating income	68	69
Allowance for funds used during construction — equity	2	2
Interest charges and financing costs
Interest charges	13	11
Allowance for funds used during construction — debt	(1)	(1)
Total interest charges and financing costs	12	10
Income before income taxes	58	61
Income tax expense	13	14
Net income	$ 45	$ 47