Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues, net	$ 484	$ 476	$ 1,399	$ 1,399
Operating expenses:
Purchased power and fuel	180	181	455	490
Generation, transmission and distribution	69	64	199	192
Administrative and other	63	59	185	179
Depreciation and amortization	79	76	244	227
Taxes other than income taxes	29	28	89	86
Total operating expenses	420	408	1,172	1,174
Income from operations	64	68	227	225
Interest expense, net	28	28	82	86
Other income:
Allowance for equity funds used during construction	4	6	19	15
Miscellaneous income (expense), net	0	(2)	0	0
Other income, net	4	4	19	15
Income before income tax expense	40	44	164	154
Income tax expense	6	8	32	33
Net income and Comprehensive income	$ 34	$ 36	$ 132	$ 121
Weighted-average shares outstanding (in thousands):
Weighted Average Number of Shares Outstanding, Basic and Diluted	88,921	88,766	88,885	82,633
Earnings per share:
Earnings Per Share, Basic and Diluted	$ 0.38	$ 0.40	$ 1.49	$ 1.47
Dividends declared per common share	$ 0.32	$ 0.30	$ 0.94	$ 0.88