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Schedule of Reconciliation of Effective Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Line Items]
U.S. statutory federal tax rate	21.00%	21.00%	21.00%
State income taxes, net of federal tax benefit	0.30%	0.50%	0.10%
U.S. global intangible low-taxed income	5.70%	6.20%	0.30%
Foreign taxes	(5.60%)	(4.00%)	(2.00%)
Foreign tax credits	(4.80%)	(5.90%)	(2.20%)
U.S. foreign derived intangible income	(2.20%)	(2.60%)	(1.80%)
U.S. research and development credit	(1.30%)	(1.80%)	(2.20%)
Equity compensation	(0.60%)	(0.70%)	(1.20%)
Uncertain tax positions	(0.10%)	(4.30%)	1.00%
U.S. transition tax		1.90%	(10.50%)
Impact of rate change on deferred taxes			0.30%
Other, net	0.60%	0.80%	0.60%
Effective tax rate, Total	13.00%	11.10%	3.40%

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