Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue, net	$ 525	$ 515	$ 1,469	$ 1,494
Alternative revenue programs, net of amortization	0	0	(2)	0
Total Revenues	525	515	1,467	1,494
Operating expenses:
Purchased power and fuel	186	184	420	443
Generation, transmission and distribution	72	73	212	235
Administrative and other	49	63	188	194
Depreciation and amortization	96	87	281	257
Taxes other than income taxes	31	30	95	94
Total operating expenses	434	437	1,196	1,223
Income from operations	91	78	271	271
Interest expense, net	31	30	93	90
Other income:
Allowance for equity funds used during construction	2	4	8	9
Miscellaneous income (expense), net	0	1	0	1
Other income, net	2	5	8	10
Income before income tax expense	62	53	186	191
Income tax expense	9	13	23	46
Net income and Comprehensive income	$ 53	$ 40	$ 163	$ 145
Weighted-average common shares outstanding-basic and diluted (in thousands)	89,239	89,065	89,205	89,044
Earnings per share-basic and diluted	$ 0.59	$ 0.44	$ 1.82	$ 1.62
Dividends declared per common share	$ 0.3625	$ 0.3400	$ 1.0650	$ 1.0000