Consolidated Statements Of Stockholder's Equity (Deficit) (USD $) In Millions	Common Stock [Member] Successor [Member]	Common Stock [Member] Predecessor [Member]	Accumulated Deficit [Member] Successor [Member]	Accumulated Deficit [Member] Predecessor [Member]	Successor [Member]	Predecessor [Member]
Balance at beginning of period at Dec. 31, 2009		$ 11,346		$ (11,034)
Asset transfers		27
Net income				842		842
Dividends declared				(1,600)
Change in other comprehensive income				2
Balance at end of period at Sep. 30, 2010		11,373		(11,790)		(417)
Balance at beginning of period at Jun. 30, 2010
Net income						286
Balance at end of period at Sep. 30, 2010						(417)
Balance at beginning of period at Dec. 31, 2010		11,425		(12,256)		(831)
Net income				299		299
Dividends declared				(1,000)
Change in other comprehensive income				1
Balance at end of period at Mar. 31, 2011	9,973	11,425		(12,956)		(1,531)
Net income			364		364
Dividends declared			(628)
Balance at end of period at Sep. 30, 2011	9,973		(264)		9,709
Balance at beginning of period at Jun. 30, 2011
Net income					199
Balance at end of period at Sep. 30, 2011	$ 9,973				$ 9,709