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Pensions - Weighted Average Assumptions Used to Determine Benefit Obligations (Detail)
Dec. 31, 2019
Dec. 31, 2018
UNITED STATES    
Weighted average assumptions used to determine benefit obligations    
Discount rate 3.15% 4.20%
Foreign Plan [Member]    
Weighted average assumptions used to determine benefit obligations    
Discount rate 3.05% 3.65%
Pension Plan [Member] | UNITED STATES    
Weighted average assumptions used to determine benefit obligations    
Discount rate 3.28% 4.25%
Pension Plan [Member] | Foreign Plan [Member]    
Weighted average assumptions used to determine benefit obligations    
Discount rate 1.79% 2.34%
Rate of compensation increase 1.33% 2.99%