Consolidated Statements of Operations Statement (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating revenue	$ 1,288	$ 1,232
Operating costs and expenses:
Energy costs	504	453
Operations and maintenance	273	271
Depreciation and amortization	179	168
Taxes, other than income taxes	42	43
Total operating costs and expenses	998	935
Operating income	290	297
Other income (expense):
Interest expense	(94)	(94)
Allowance for borrowed funds	8	8
Allowance for equity funds	16	15
Other, net	2	1
Total other income (expense)	(68)	(70)
Income before income tax expense	222	227
Income tax expense	67	67
Net income	$ 155	$ 160