Consolidated Statements of Operations (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating Revenues	$ 1,219	$ 1,198
Operating Expenses
Fuel, purchased power and gas	372	377
Operation and maintenance	331	355
Depreciation, depletion and amortization	212	185
Taxes other than income	70	68
Asset (gains) losses and reserves, net	(1)	0
Total operating expenses	984	985
Operating Income	235	213
Other (Income) and Deductions
Interest expense	66	69
Other income	(15)	(16)
Other expenses	6	6
Total Other (Income) and Deductions	57	59
Income Before Income Taxes	178	154
Income Tax Expense	62	57
Net Income	$ 116	$ 97