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Employee Benefits - Weighted-Average Actuarial Assumption Used to Determine Expense (Detail) - Pension Plan [Member]
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
U.S Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 3.26% 4.31% 3.69%
Expected return on plan assets 5.60% 5.60% 6.20%
Rate of compensation increase 3.25% 3.25% 3.25%
Non-U.S. Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 1.49% 2.22% 2.15%
Expected return on plan assets 4.62% 4.87% 5.19%
Rate of compensation increase 2.46% 1.93% 1.98%