Schedule II VALUATION AND QUALIFYING ACCOUNTS (Details) (Valuation Allowance for Deferred Tax Assets [Member], USD $) In Millions, unless otherwise specified	4 Months Ended	12 Months Ended
	Dec. 31, 2012	Aug. 31, 2012	Dec. 31, 2011	Aug. 31, 2010
Valuation Allowance for Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	$ 41	$ 36		$ 9
Additions charged to expenses/other accounts	2	5	19	8
Net (deductions) recoveries	0	0	0	0
Balance at end of year	$ 43	$ 41		$ 17