Consolidated Statements of Operations Statement (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Operating revenue	$ 1,198	$ 1,165	$ 3,408	$ 3,323
Operating costs and expenses:
Energy costs	428	450	1,182	1,213
Operations and maintenance	263	264	811	798
Depreciation and amortization	151	137	456	414
Taxes, other than income taxes	40	34	113	98
Total operating costs and expenses	882	885	2,562	2,523
Operating income	316	280	846	800
Other income (expense):
Interest expense	(102)	(97)	(297)	(291)
Allowance for borrowed funds	7	11	18	35
Allowance for equity funds	12	21	34	63
Interest income	1	1	5	4
Other, net	(2)	0	(3)	(2)
Total other income (expense)	(84)	(64)	(243)	(191)
Income before income tax expense	232	216	603	609
Income tax expense	63	60	178	167
Net income	$ 169	$ 156	$ 425	$ 442