Consolidated Statements of Operations (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Operating Revenues	$ 1,265	$ 1,289	$ 2,484	$ 2,487
Operating Expenses
Fuel, purchased power and gas	435	428	807	805
Operation and maintenance	343	334	674	689
Depreciation, depletion and amortization	221	203	433	388
Taxes other than income	63	60	133	128
Asset (gains) losses and reserves, net	1	(1)	0	(1)
Total operating expenses	1,063	1,024	2,047	2,009
Operating Income	202	265	437	478
Other (Income) and Deductions
Interest expense	68	65	134	134
Other income	(9)	(11)	(24)	(27)
Other expenses	6	9	12	15
Total Other (Income) and Deductions	65	63	122	122
Income Before Income Taxes	137	202	315	356
Income Tax Expense	47	75	109	132
Net Income	$ 90	$ 127	$ 206	$ 224