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Pension and Other Benefit Plans - Weighted-Average Assumed Discount Rate and Compensation Increases Used to Determine Projected Benefit Obligations for US and International Plans (Detail)
Dec. 31, 2018
Dec. 31, 2017
US    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate 4.30% 3.70%
Compensation increases 4.00% 4.00%
International    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate 4.00% 3.55%
Compensation increases 4.83% 4.81%