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Income Taxes - Reconciliation Between U.S. Federal Income Tax Rate and Effective Tax Rate (Detail)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Tax Disclosure [Abstract]      
U.S. federal income tax rate 21.00% 35.00% 35.00%
State income taxes—U.S. 1.30% (6.20%) 1.80%
Taxes on non-U.S. income - U.S., Canadian & European reorganization 1.10% (8.40%) 4.30%
U.S. tax reform 1.60% 66.60% 0.00%
Valuation allowances 0.50% (3.30%) 1.50%
Taxes on non-U.S. income 0.40% (24.60%) (2.50%)
Employee share-based payments 1.60% 28.00% 0.00%
Manufacturing deduction credit (1.00%) (15.30%) (1.30%)
Research and development credit (0.90%) (4.70%) (0.60%)
Other 0.50% (1.60%) (0.10%)
Effective income tax rate 22.90% 9.50% 38.10%