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Post-Employment and Other Long-Term Employees Benefits - Schedule of Accumulated Benefit Obligations (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Pension benefits, Defined Benefit [Member]
   
Pension Plans, Postretirement and Other Employee Benefits [Line Items]    
Accumulated benefit obligations $ 717 $ 779
Other Pension Plans, Defined Benefit [Member]
   
Pension Plans, Postretirement and Other Employee Benefits [Line Items]    
Accumulated benefit obligations $ 51 $ 49