CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Operating revenues
Electric, non-affiliates	$ 203	$ 195	$ 559	$ 524
Electric, affiliates	49	41	141	123
Natural gas	22	15	110	79
Total operating revenues	274	251	810	726
Operating expenses
Electric fuel and purchased power, non-affiliates	5	3	15	10
Purchased power, affiliates	106	100	312	285
Cost of natural sold and transported	13	6	64	33
Operating and maintenance expenses	47	47	146	141
Conservation program expenses	4	3	10	10
Depreciation and amortization	37	39	110	116
Taxes (other than income taxes)	7	7	22	21
Total operating expenses	219	205	679	616
Operating income	55	46	131	110
Other expense, net	(1)	(2)	(1)	(6)
Allowance for funds used during construction — equity	2	2	4	4
Interest charges and financing costs
Interest charges	10	11	31	30
Allowance for funds used during construction — debt	0	(1)	(1)	(2)
Total interest charges and financing costs	10	10	30	28
Income before income taxes	46	36	104	80
Income tax expense (benefit)	10	(4)	22	(5)
Net income	$ 36	$ 40	$ 82	$ 85