Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues, net	$ 495	$ 530
Alternative revenue programs, net of amortization	(2)	0
Total revenues	493	530
Operating expenses:
Purchased power and fuel	130	141
Generation, transmission and distribution	69	81
Administrative and other	69	67
Depreciation and amortization	92	84
Taxes other than income taxes	33	33
Total operating expenses	393	406
Income from operations	100	124
Interest expense, net	31	30
Other income:
Allowance for equity funds used during construction	4	2
Miscellaneous income (expense), net	(1)	0
Other income, net	3	2
Income before income tax expense	72	96
Income tax expense	8	23
Net income	64	73
Other comprehensive loss	0	(1)
Comprehensive income	$ 64	$ 72
Weighted-average shares outstanding-basic and diluted (in thousands)	89,160	89,003
Earnings per share-basic and diluted	$ 0.72	$ 0.82
Dividends declared per common share	$ 0.34	$ 0.32