Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Activities
Net Income	$ 668	$ 618	$ 720
Adjustments to reconcile net income to net cash from operating activities:
Depreciation, depletion and amortization	1,094	1,018	995
Nuclear fuel amortization	38	29	46
Allowance for equity funds used during construction	(15)	(13)	(6)
Deferred income taxes	164	47	220
Loss on sale of non-utility business	0	83	0
Asset (gains) and losses, reserves and impairments, net	(8)	1	(21)
Changes in assets and liabilities:
Accounts receivable, net	(154)	52	71
Inventories	123	35	(129)
Accounts payable	14	40	(23)
Derivative assets and liabilities	107	53	(94)
Accrued pension obligation	(644)	280	432
Accrued postretirement obligation	(526)	(323)	209
Regulatory assets and liabilities	1,269	278	(662)
Other assets	(24)	55	44
Other liabilities	48	(44)	206
Net cash from operating activities	2,154	2,209	2,008
Investing Activities
Plant and equipment expenditures — utility	(1,534)	(1,451)	(1,382)
Plant and equipment expenditures — non-utility	(342)	(369)	(102)
Proceeds from sale of non-utility business	0	255	0
Proceeds from sale of assets	36	38	18
Restricted cash for debt redemption, principally Securitization	(1)	2	(5)
Acquisition, Net of Cash Acquired	0	(198)	0
Proceeds from sale of nuclear decommissioning trust fund assets	1,118	759	833
Investment in nuclear decommissioning trust funds	(1,134)	(764)	(850)
Other	(49)	(41)	(72)
Net cash used for investing activities	(1,906)	(1,769)	(1,560)
Financing Activities
Issuance of long-term debt, net of issuance costs	1,234	759	1,179
Redemption of long-term debt	(961)	(639)	(1,455)
Short-term borrowings, net	(109)	(179)	269
Issuance of common stock	39	39	0
Repurchase of common stock	0	0	(18)
Dividends on common stock	(445)	(407)	(389)
Other	(19)	(16)	(31)
Net cash used for financing activities	(261)	(443)	(445)
Net Increase (Decrease) in Cash and Cash Equivalents	(13)	(3)	3
Cash and Cash Equivalents at Beginning of Period	65	68	65
Cash and Cash Equivalents at End of Period	52	65	68
Supplemental disclosure of cash information
Cash paid (received) for interest (net of interest capitalized)	418	438	485
Cash paid (received) for Income Taxes	121	173	(205)
Supplemental disclosure of non-cash information
Common stock issued for employee benefit and compensation plans	293	155	15
Plant and equipment expenditures in accounts payable	$ 329	$ 235	$ 212