Effective Income Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
U.S. federal income tax rate	21.00%	21.00%	21.00%
Non-Deductible Expenses	3.00%	0.30%	1.40%
Foreign tax rate variances	8.40%	4.10%	5.50%
Tax credits	(3.20%)	(1.70%)	(3.90%)
Change in Valuation Allowances			(3.20%)
Current year losses with no benefit	7.10%	0.20%	0.50%
Net operating loss carry-forwards		(0.10%)	(0.10%)
Changes in tax reserves	1.70%	1.70%	3.40%
Provision to Return	(8.80%)	(2.30%)	(0.30%)
Earnings of equity investments	(0.20%)	(0.10%)	(0.10%)
Withholding taxes	8.50%	2.40%	3.50%
State taxes, net of federal benefit	(0.70%)	0.40%	1.10%
Antitrust settlement			9.90%
U.S. FDII Deduction		(0.50%)
U.S. GILI Tax		1.80%	1.70%
Other, net	(1.50%)	1.40%	(2.00%)
Effective income tax rate	35.30%	28.60%	38.40%