Condensed Consolidated Statements of Income (Unaudited) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Revenues, net	$ 473	$ 493
Operating expenses:
Purchased power and fuel	161	184
Generation, transmission and distribution	62	54
Administrative and other	60	54
Depreciation and amortization	75	75
Taxes other than income taxes	30	28
Total operating expenses	388	395
Income from operations	85	98
Interest expense, net	30	25
Other income (expense):
Allowance for equity funds used during construction	4	6
Miscellaneous income (expense), net	1	(1)
Other income, net	5	5
Income before income tax expense	60	78
Income tax expense	10	20
Net income and Comprehensive income	$ 50	$ 58
Weighted-average shares outstanding (in thousands):
Basic	78,271	78,992
Diluted	81,466	80,156
Earnings per share:
Basic	$ 0.64	$ 0.74
Diluted	$ 0.62	$ 0.73
Dividends declared per common share	$ 0.280	$ 0.275