CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
OPERATING ACTIVITIES:
Net (loss) income	$ (11)	$ 135
Less: Income from discontinued operations, net of tax expense		149
Loss from continuing operations	(11)	(14)
Adjustments to reconcile net loss from continuing operations to net cash provided by operating activities from continuing operations:
Depreciation and amortization expense	50	47
Amortization of long-term debt deferred financing costs	1	1
Amortization of debt premium and discount	(1)	(1)
Loss on extinguishment of debt	2
Non-cash convertible debt related expense	6	5
Stock-based compensation expense	5	5
Equity in net income from unconsolidated investments	(1)
Dividends from unconsolidated investments		4
Deferred income taxes	(7)	(9)
Other, net	(5)	(1)
Change in restricted funds held in trust	2	(15)
Change in working capital, net of effects of acquisitions	63	71
Total adjustments for continuing operations	115	107
Net cash provided by operating activities from continuing operations	104	93
Net cash used in operating activities from discontinued operations		(10)
Net cash provided by operating activities	104	83
INVESTING ACTIVITIES:
Proceeds from the sale of investment securities	1	5
Purchase of investment securities		(4)
Purchase of property, plant and equipment	(32)	(38)
Acquisition of land use rights	(1)
Other, net		3
Net cash used in investing activities from continuing operations	(32)	(34)
Net cash provided by investing activities from discontinued operations		220
Net cash (used in) provided by investing activities	(32)	186
FINANCING ACTIVITIES:
Proceeds from borrowings on long-term debt	699
Payment of deferred financing costs	(23)
Principal payments on long-term debt	(619)	(2)
Principal payments on project debt	(37)	(74)
Convertible debenture repurchases	(25)	(6)
Proceeds from borrowings on project debt		2
Change in restricted funds held in trust	12	44
Cash dividends paid to stockholders	(10)
Common stock repurchased	(30)	(54)
Financing of insurance premiums, net	(3)
Distributions to partners of noncontrolling interests in subsidiaries		(2)
Other, net	(1)	(2)
Net cash used in financing activities from continuing operations	(37)	(94)
Net cash provided by financing activities from discontinued operations		10
Net cash used in financing activities	(37)	(84)
Effect of exchange rate changes on cash and cash equivalents		2
Net increase in cash and cash equivalents	35	187
Cash and cash equivalents at beginning of period	234	141
Cash and cash equivalents at end of period	269	328
Less: Cash and cash equivalents of discontinued operations at end of period	2	1
Cash and cash equivalents of continuing operations at end of period	$ 267	$ 327