CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash Flows From Operating Activities
Net income (loss)	$ (19)	$ 177
(Income) loss from discontinued operations	3	(4)
Income (loss) from continuing operations, net	(16)	173
Adjustments to reconcile income to net cash provided by operating activities:
Equity in income from unconsolidated affiliates	(67)	(98)
Distributions from unconsolidated affiliates	52	75
Depreciation and amortization	243	190
Deferred taxes and tax credits	(143)	35
Changes in operating assets and liabilities:
Decrease in margin and collateral deposits	15	31
Decrease in accounts receivables	252	147
Increase in inventory	(12)	(22)
Increase in prepaid expenses and other	(25)
(Increase) decrease in restricted cash	(12)	53
Increase in rent payments in excess of levelized rent expense	(133)	(148)
Increase (decrease) in accounts payable and other current liabilities	33	(129)
Increase in interest payable	72	71
(Increase) decrease in derivative assets and liabilities	(7)	86
Proceeds from U.S. Treasury grants	310	92
Decrease in other operating-assets	23	8
Increase (decrease) in other operating-liabilities	(35)	24
Operating cash flow from continuing operations	550	588
Operating cash flow from discontinued operations	(3)	4
Net cash provided by operating activities	547	592
Cash Flows From Financing Activities
Borrowings on long-term debt	189	118
Payments on long-term debt	(85)	(26)
Borrowings under construction loans		98
Borrowings under short-term debt	32
Payments to affiliates related to stock-based awards	(6)	(2)
Excess tax benefits related to stock option exercises	1
Financing costs	(18)	(16)
Net cash provided by financing activities from continuing operations	113	172
Cash Flows From Investing Activities
Capital expenditures	(477)	(469)
Proceeds from return of capital and loan repayments and sale of assets	15	16
Investments in and loans to unconsolidated affiliates	(10)
Purchase of interest of acquired companies	(3)	(4)
Maturities of short-term investments		1
Decrease in restricted deposits	4
Investments in other assets	(29)	(7)
Net cash used in investing activities from continuing operations	(500)	(463)
Net increase in cash and cash equivalents	160	301
Cash and cash equivalents at beginning of period	1,075	796
Cash and cash equivalents at end of period	$ 1,235	$ 1,097