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		$ (22)	$ (489)	$ (42,953)
Share-based compensation and other, net		84
Embedded option in convertible debt		(165)
Other				(8)
Other comprehensive income					14
Net income						106		106
Dividends declared						(278)
TOTAL STOCKHOLDERS' EQUITY (DEFICIT)	17	42,188		(30)	(475)	(43,125)		(1,425)
Balance at end of period at Sep. 30, 2010	17	42,188		(30)	(475)	(43,125)		(1,425)
Balance at beginning of period at Jun. 30, 2010
Net income								(90)
TOTAL STOCKHOLDERS' EQUITY (DEFICIT)	17							(1,425)
Balance at end of period at Sep. 30, 2010	17							(1,425)
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 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 income							19		19
Dividends declared							(599)
TOTAL STOCKHOLDERS' EQUITY (DEFICIT)			12,273				(580)		11,693
Balance at end of period at Sep. 30, 2011			12,273				(580)		11,693
Balance at beginning of period at Jun. 30, 2011
Net income									32
TOTAL STOCKHOLDERS' EQUITY (DEFICIT)			12,273						11,693
Balance at end of period at Sep. 30, 2011			$ 12,273						$ 11,693