Consolidated Statements of Cash Flows (USD $) In Millions	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net income	$ 405	$ 606
Less: Income (loss) from discontinued operations	(3)	8
Income from continuing operations	408	598
Adjustments to reconcile to net cash provided by operating activities:
Depreciation, decommissioning and amortization	852	749
Regulatory impacts of net nuclear decommissioning trust earnings (reflected in accumulated depreciation)	75	74
Other amortization	75	56
Stock-based compensation	15	14
Equity in income from unconsolidated affiliates - net	(12)	(39)
Distributions from unconsolidated entities	15	39
Deferred income taxes and investment tax credits	223	247
Proceeds from U.S. treasury grants		92
Income from leveraged leases	(3)	(2)
Changes in operating assets and liabilities:
Receivables	64	13
Inventory	(21)	(36)
Margin and collateral deposits - net of collateral received	1	12
Prepaid taxes	34	(167)
Other current assets	(189)	(136)
Rent payments in excess of levelized rent expense	(101)	(111)
Accounts payable	66	(114)
Accrued taxes	(19)	(69)
Other current liabilities	(212)	(164)
Derivative assets and liabilities - net	303	806
Regulatory assets and liabilities - net	(260)	(720)
Other assets	(31)	(36)
Other liabilities	(58)	(152)
Operating cash flows from discontinued operations	(3)	8
Net cash provided by operating activities	1,222	962
Cash flows from financing activities:
Long-term debt issued	592	645
Long-term debt issuance costs	(5)	(19)
Long-term debt repaid	(30)	(366)
Bonds purchased	(56)
Preference stock issued - net	123
Short-term debt financing - net	292	410
Settlements of stock-based compensation - net	(13)	(2)
Dividends and distributions to noncontrolling interests	(28)	(25)
Dividends paid	(209)	(205)
Net cash provided by financing activities	666	438
Cash flows from investing activities:
Capital expenditures	(2,256)	(2,070)
Purchase of interest in acquired companies		(4)
Proceeds from sale of nuclear decommissioning trust investments	1,146	600
Purchases of nuclear decommissioning trust investments and other	(1,230)	(697)
Proceeds from partnerships and unconsolidated subsidiaries, net of investment	5	44
Investments in other assets	3	13
Effect of consolidation and deconsolidation of variable interest entities		(91)
Net cash used by investing activities	(2,332)	(2,205)
Net decrease in cash and cash equivalents	(444)	(805)
Cash and cash equivalents, beginning of period	1,389	1,673
Cash and cash equivalents, end of period	$ 945	$ 868