Consolidated Statements of Operations (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating revenue:
Electric	$ 177	$ 172
Natural gas	44	34
Total operating revenue	221	206
Operating costs and expenses:
Cost of fuel, energy and capacity	80	62
Natural gas purchased for resale	29	18
Operating and maintenance expense	34	48
Depreciation and amortization	26	25
Property and other taxes	6	6
Total operating costs and expenses	175	159
Operating income	46	47
Other income (expense):
Interest expense, net of allowance for debt funds	(15)	(16)
Allowance for equity funds	1	1
Other, net	2	2
Total other income (expense)	(12)	(13)
Income before income tax expense	34	34
Income tax expense	12	12
Net income	$ 22	$ 22