v2.4.0.6
Other Comprehensive Income/(Loss) (Parenthetical) (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Comprehensive Income (Loss) [Line Items]      
Adjustments attributable to noncontrolling interests $ 45 $ (5) $ (6)