CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Operating revenues
Electric, non-affiliates	$ 178	$ 158	$ 356	$ 329
Electric, affiliates	46	41	92	82
Natural gas	31	19	88	64
Total operating revenues	255	218	536	475
Operating expenses
Electric fuel and purchased power, non-affiliates	5	3	10	6
Purchased power, affiliates	106	91	206	186
Cost of natural sold and transported	20	7	51	28
Operating and maintenance expenses	50	45	99	94
Conservation program expenses	3	3	6	6
Depreciation and amortization	36	39	73	77
Taxes (other than income taxes)	8	7	15	14
Total operating expenses	228	195	460	411
Operating income	27	23	76	64
Other expense, net	0	(2)	0	(4)
Allowance for funds used during construction — equity	1	1	2	3
Interest charges and financing costs
Interest charges	12	10	21	20
Allowance for funds used during construction — debt	(1)	(1)	(1)	(1)
Total interest charges and financing costs	11	9	20	19
Income before income taxes	17	13	58	44
Income tax expense (benefit)	3	1	12	(2)
Net income	$ 14	$ 12	$ 46	$ 46