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Post-Employment and Other Long-Term Employees Benefits - Accumulated Other Comprehensive Income (Loss) Before Tax Effects (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Compensation And Retirement Disclosure [Abstract]    
Other comprehensive loss, actuarial (gains)/losses, beginning balance $ 209 $ 175
Net amount generated/arising in current year, actuarial (gains)/losses (105) 43
Amortization, actuarial (gains)/losses (15) (14)
Foreign currency translation, actuarial (gains)/losses before tax 2 5
Other comprehensive loss, actuarial (gains)/losses, ending balance 91 209
Other comprehensive loss, prior service cost, beginning balance 9 10
Net amount generated/arising in current year, prior service cost 5 4
Amortization, prior service cost (5) (5)
Other comprehensive loss, prior service cost, ending balance 9 9
Other comprehensive loss, Total, beginning balance 218 185
Net amount generated/arising in current year, Total (100) 47
Amortization, Total (20) (19)
Foreign currency translation adjustment, Total 2 5
Other comprehensive loss, Total, ending balance $ 100 $ 218