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Retirement Plans - Defined Benefit Plan, Weighted-Average Assumptions Used in Calculating Benefit Obligation (Detail)
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
United States [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 3.42% 4.40% 3.94%
Non-U.S. Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 1.38% 1.95% 1.79%
Increases in compensation levels 2.83% 2.66% 2.43%