Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Operating Activities
Net Income	$ 419	$ 347
Adjustments to reconcile net income to net cash from operating activities:
Depreciation, depletion and amortization	607	619
Deferred income taxes	(48)	119
Asset (gains), losses and reserves and impairments, net	(1)	13
Changes in assets and liabilities, exclusive of changes shown separately (Note 11)	245	(268)
Net cash from operating activities	1,222	830
Investing Activities
Plant, and equipment expenditures	(855)	(842)
Restricted cash for debt redemption, principally Securitization	57	47
Proceeds from sale of nuclear decommissioning trust fund assets	48	69
Investment in nuclear decommissioning trust funds	(61)	(97)
Notes receivable - affiliates	(252)	103
Other investments	(13)	(24)
Net cash used for investing activities	(1,076)	(744)
Financing Activities
Issuance of long-term debt	496	610
Redemption of long-term debt	(401)	(554)
Short-term borrowings - affiliates	1	33
Short-term borrowings — other	0	50
Dividends on common stock	(229)	(229)
Other	(3)	(6)
Net cash used for financing activities	(136)	(96)
Net Increase (Decrease) in Cash and Cash Equivalents	10	(10)
Cash and Cash Equivalents at Beginning of Period	13	30
Cash and Cash Equivalents at End of Period	$ 23	$ 20