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Retirement Plans - Defined Benefit Plan, Weighted-Average Assumptions Used in Calculating Net Periodic Benefit Cost (Detail)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
United States [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 3.96% 4.28% 4.42%
Return on plan assets 4.35% 6.53% 6.47%
Non-U.S. Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 1.93% 1.80% 2.20%
Return on plan assets 2.75% 2.64% 2.74%
Increases in compensation levels 2.70% 2.63% 2.50%