Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data	Sep. 30, 2011 Successor [Member]	Dec. 31, 2010 Predecessor [Member]
Accounts receivable, allowance	$ 38	$ 83
Preferred stock, par value	$ 1	$ 1
Preferred stock, shares authorized	0	200,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	1,000	5,000,000,000
Common stock, shares issued	1,000	1,792,145,000
Treasury stock, shares	0	27,841,000
Treasury stock, shares held in rabbi trust	0	22