Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues, net	$ 449	$ 449	$ 944	$ 979
Alternative revenue programs, net of amortization	0	0	(2)	0
Total revenues	449	449	942	979
Operating expenses:
Purchased power and fuel	104	118	234	259
Generation, transmission and distribution	71	81	140	162
Administrative and other	70	64	139	131
Depreciation and amortization	93	86	185	170
Taxes other than income taxes	31	31	64	64
Total operating expenses	369	380	762	786
Income from operations	80	69	180	193
Interest expense, net	31	30	62	60
Other income:
Allowance for equity funds used during construction	2	3	6	5
Miscellaneous income (expense), net	1	0	0	0
Other income, net	3	3	6	5
Income before income tax expense	52	42	124	138
Income tax expense	6	10	14	33
Net income	46	32	110	105
Other comprehensive income	0	1	0	0
Comprehensive income	$ 46	$ 33	$ 110	$ 105
Weighted-average shares outstanding-basic and diluted (in thousands)	89,215	89,063	89,188	89,033
Earnings per share-basic and diluted	$ 0.51	$ 0.36	$ 1.23	$ 1.18
Dividends declared per common share	$ 0.3625	$ 0.3400	$ 0.7025	$ 0.6600