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Weighted Average Actuarial Assumptions to Determine Benefit Obligations (Detail)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Foreign Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 1.90% 2.60%  
Rate of compensation increase 3.50% 3.50%  
Health care cost trend rate:      
Net periodic benefit cost rate of compensation increase 3.50% 3.50% 3.50%
United States Pension Plan of US Entity [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 4.40% 4.70%  
Expected return on plan assets 8.50% 8.50% 8.50%
Rate of compensation increase 2.80% 3.10%  
Health care cost trend rate:      
Assumed for next year 6.40% 6.60%  
Ultimate rate 4.50% 4.50%  
Year that the ultimate rate is reached 2047 2035  
Net periodic benefit cost rate of compensation increase 3.10% 3.00% 3.00%