Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues, net	$ 428	$ 450	$ 915	$ 923
Operating expenses:
Purchased power and fuel	126	148	275	309
Generation, transmission and distribution	64	66	130	128
Administrative and other	61	60	122	120
Depreciation and amortization	83	76	165	151
Taxes other than income taxes	30	28	60	58
Total operating expenses	364	378	752	766
Income from operations	64	72	163	157
Interest expense, net	27	28	54	58
Other income:
Allowance for equity funds used during construction	8	5	15	9
Miscellaneous income (expense), net	1	1	0	2
Other income, net	9	6	15	11
Income before income tax expense	46	50	124	110
Income tax expense	9	15	26	25
Net income and Comprehensive income	$ 37	$ 35	$ 98	$ 85
Weighted-average shares outstanding (in thousands):
Basic	88,902	80,745	88,867	79,515
Diluted	88,902	80,745	88,867	79,515
Earnings per share:
Basic	$ 0.42	$ 0.44	$ 1.10	$ 1.07
Diluted	0.42	0.44	1.10	1.07
Dividends declared per common share	$ 0.320	$ 0.300	$ 0.62	$ 0.58