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Changes in Accumulated Postemployment Benefit Obligations (Detail) (Postemployment Benefit Plans, USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Postemployment Benefit Plans
      
Defined Benefit Plan Disclosure [Line Items]      
Accrued benefit obligation at January 1 $ 100 $ 166  
Service cost 8 12 11
Interest cost 5 8 9
Benefits paid (21) (44)  
Assumption changes (2) 7  
Actuarial losses 13 14  
Spin-Off Impact   (63)  
Accrued benefit obligation at December 31 $ 103 $ 100 $ 166