Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue, net	$ 469	$ 462	$ 1,033	$ 1,032
Alternative revenue programs, net of amortization	0	(2)	9	1
Total revenues	469	460	1,042	1,033
Operating expenses:
Purchased power and fuel	109	105	262	284
Generation, transmission and distribution	77	86	150	163
Administrative and other	74	78	145	149
Depreciation and amortization	104	101	212	202
Taxes other than income taxes	34	33	69	67
Total operating expenses	398	403	838	865
Income from operations	71	57	204	168
Interest expense, net	34	31	67	63
Other income:
Allowance for equity funds used during construction	4	2	7	5
Miscellaneous income (loss), net	3	0	(1)	2
Other income, net	7	2	6	7
Income before income tax expense	44	28	143	112
Income tax expense	5	3	23	14
Net income	39	25	120	98
Other comprehensive Income	0	1	1	2
Comprehensive Income	$ 39	$ 26	$ 121	$ 100
Weighted-average common shares outstanding (in thousands):
Basic	89,489	89,357	89,459	89,333
Diluted	89,625	89,561	89,602	89,537
Earnings per share:
Basic	$ 0.44	$ 0.28	$ 1.34	$ 1.10
Diluted	$ 0.43	$ 0.28	$ 1.34	$ 1.09