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Long-Term Employee Benefit Liabilities - Long-Term Employee Benefit Liabilities (Detail) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Retirement Benefits [Abstract]    
Defined benefit pension plans and other $ 264 $ 313
Termination and long service arrangements 368 319
Retirement medical benefits plans 31 29
Other long-term employee benefits 7 6
Long-term employee benefit obligations $ 670 $ 667