Consolidated Statements of Stockholders' Equity (Deficit) (USD $) In Millions	Common Stock [Member] Predecessor [Member]	Additional Paid-In Capital [Member] Predecessor [Member]	Additional Paid-In Capital [Member] Successor [Member]	Treasury Stock [Member] Predecessor [Member]	Accumulated Other Comprehensive Loss [Member] Predecessor [Member]	Accumulated Deficit [Member] Predecessor [Member]	Accumulated Deficit [Member] Successor [Member]	Predecessor [Member]	Successor [Member]
Balance at beginning of period at Dec. 31, 2009	$ 17	$ 42,269		$ (29)	$ (489)	$ (42,953)
Share-based compensation and other, net		43
Embedded option in convertible debt		(165)
Other				1
Other comprehensive income					8
Net (loss) income						196		196
Dividends declared						(139)
TOTAL STOCKHOLDERS' EQUITY (DEFICIT)	17	42,147		(28)	(481)	(42,896)		(1,241)
Balance at end of period at Jun. 30, 2010	17	42,147		(28)	(481)	(42,896)		(1,241)
Balance at beginning of period at Mar. 31, 2010
Net (loss) income								158
TOTAL STOCKHOLDERS' EQUITY (DEFICIT)	17							(1,241)
Balance at end of period at Jun. 30, 2010	17							(1,241)
Balance at beginning of period at Dec. 31, 2010	18	42,285		(157)	(376)	(43,425)		(1,655)
Share-based compensation and other, net		18
Other comprehensive income					7
Net (loss) income						211		211
Dividends declared						(141)
TOTAL STOCKHOLDERS' EQUITY (DEFICIT)	18	42,303	12,273	(157)	(369)	(43,355)		(1,560)
Balance at end of period at Mar. 31, 2011	18	42,303	12,273	(157)	(369)	(43,355)		(1,560)
Net (loss) income							(26)		(26)
Dividends declared							(28)
TOTAL STOCKHOLDERS' EQUITY (DEFICIT)			12,273				(54)		12,219
Balance at end of period at Jun. 30, 2011			$ 12,273				$ (54)		$ 12,219