CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash Flows From Operating Activities
Net Income (Loss)	$ (1,079)	$ 163	$ 194
(Income) loss from discontinued operations	3	(4)	7
Income (loss) from continuing operations, net	(1,076)	159	201
Adjustments to reconcile income (loss) to net cash provided by operating activities:
Equity in income from unconsolidated affiliates	(85)	(104)	(100)
Distributions from unconsolidated affiliates	82	91	76
Depreciation and amortization	330	260	246
Deferred taxes and tax credits	(903)	162	275
Asset impairments and other charges	1,746	45	4
Gain on sale of assets	(8)	0	0
Proceeds from U.S. Treasury grants	388	92	0
Changes in operating assets and liabilities:
(Increase) decrease in margin and collateral deposits	18	61	(32)
(Increase) decrease in receivables	251	(65)	(35)
Increase in inventory	(38)	(37)	(8)
Decrease in prepaid expenses and other	7	6	53
(Increase) decrease in restricted cash and cash equivalents	(4)	68	(69)
Increase in rent payments in excess of levelized rent expense	(136)	(149)	(160)
Increase (decrease) in accounts payable and other current liabilities	178	(93)	(109)
(Increase) decrease in derivative assets and liabilities	1	18	(168)
(Increase) decrease in other operating-assets	(78)	(9)	16
Increase (decrease) in other operating-liabilities	(44)	97	68
Operating cash flow from continuing operations	629	602	258
Operating cash flow from discontinued operations	(3)	4	(7)
Net cash provided by operating activities	626	606	251
Cash Flows From Financing Activities
Borrowings on long-term debt	481	211	189
Payments on debt	(107)	(48)	(886)
Borrowings under short-term debt	32	96	0
Borrowing held in escrow pending completion of project construction	(97)	0	0
Cash contributions from noncontrolling interests	0	0	2
Cash dividends to noncontrolling interests	0	0	(3)
Payments to affiliates related to stock-based awards	(8)	(6)	(2)
Excess tax benefits related to stock-based exercises	2	1
Financing costs	(26)	(19)	(14)
Net cash provided by (used in) financing activities from continuing operations	277	235	(714)
Cash Flows From Investing Activities
Capital expenditures	(686)	(574)	(283)
Proceeds from return of capital and loan repayments and sale of assets	55	34	30
Purchase of interest of acquired companies	(3)	(4)	(22)
Investments in and loans to unconsolidated affiliates	(10)	(7)	0
Maturities of short-term investments	0	1	3
(Increase) decrease in restricted deposits	(4)	(5)	3
Investments in other assets	(30)	(7)	(279)
Net cash used in investing activities from continuing operations	(678)	(562)	(548)
Net increase (decrease) in cash and cash equivalents	225	279	(1,011)
Cash and cash equivalents at beginning of period	1,075	796	1,807
Cash and cash equivalents at end of period	$ 1,300	$ 1,075	$ 796