Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Operating Activities
Net Income	$ 453	$ 342
Adjustments to reconcile net income to net cash from operating activities:
Depreciation, depletion and amortization	562	527
Nuclear fuel amortization	19	17
Allowance for equity funds used during construction	(11)	(6)
Deferred income taxes	196	123
Asset (gains) and losses, reserves and impairments, net	(7)	0
Changes in assets and liabilities:
Accounts receivable, net	145	70
Inventories	9	133
Accounts payable	104	(29)
Gas inventory equalization	38	73
Accrued pension obligation	(89)	(42)
Accrued postretirement obligation	(43)	(174)
Derivative assets and liabilities	(59)	(15)
Regulatory assets and liabilities	(224)	226
Other assets	35	71
Other liabilities	(52)	(49)
Net cash from operating activities	1,076	1,267
Investing Activities
Plant and equipment expenditures — utility	(924)	(708)
Plant and equipment expenditures — non-utility	(156)	(197)
Proceeds from sale of assets	31	15
Restricted cash for debt redemption, principally Securitization	13	10
Proceeds from sale of nuclear decommissioning trust fund assets	475	309
Investment in nuclear decommissioning trust funds	(483)	(317)
Other	(23)	(23)
Net cash used for investing activities	(1,067)	(911)
Financing Activities
Issuance of long-term debt, net of issuance costs	595	371
Redemption of long-term debt	(664)	(515)
Short-term borrowings, net	380	(24)
Issuance of common stock	0	19
Repurchase of common stock	(52)	0
Dividends on common stock	(232)	(215)
Other	(13)	(11)
Net cash from (used for) financing activities	14	(375)
Net Increase (Decrease) in Cash and Cash Equivalents	23	(19)
Cash and Cash Equivalents at Beginning of Period	52	65
Cash and Cash Equivalents at End of Period	75	46
Supplemental Disclosure of Non-Cash Information
Plant and equipment expenditures in accounts payable	$ 209	$ 218