Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating Activities
Net Income	$ 116	$ 97
Adjustments to reconcile net income to net cash from operating activities:
Depreciation, depletion and amortization	212	185
Deferred income taxes	27	23
Asset (gains), losses and reserves, net	(1)	0
Changes in assets and liabilities, exclusive of changes shown separately (Note 11)	(113)	48
Net cash from operating activities	241	353
Investing Activities
Plant and equipment expenditures	(255)	(284)
Restricted cash for debt redemption, principally Securitization	57	60
Notes receivable from affiliate	0	26
Proceeds from sale of nuclear decommissioning trust fund assets	12	11
Investment in nuclear decommissioning trust funds	(16)	(15)
Other Investments	(6)	(13)
Net cash used for investing activities	(208)	(215)
Financing Activities
Issuance of long-term debt	372	0
Redemption of long-term debt	(139)	(84)
Short-term borrowings - other	(130)	22
Short-term borrowings from affiliate	(29)	6
Dividends on common stock	(85)	(76)
Other	(3)	(3)
Net cash used for financing activities	(14)	(135)
Net Increase (Decrease) in Cash and Cash Equivalents	19	3
Cash and Cash Equivalents at Beginning of Period	30	13
Cash and Cash Equivalents at End of Period	$ 49	$ 16