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Schedule of Reconciliation of Effective Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Line Items]
U.S. statutory federal tax rate	21.00%	35.00%	35.00%
U.S. transition tax	(10.50%)	28.70%
U.S, foreign derived intangible income	(1.80%)
Impact of rate change on deferred tax	0.30%	6.90%
Uncertain tax positions	1.00%	1.70%	(2.60%)
Foreign taxes	(2.00%)	(16.30%)	78.00%
Foreign tax credits	(2.20%)	(2.20%)	49.10%
U.S. research and development credit	(2.20%)	(1.60%)	15.80%
Equity compensation	(1.20%)	(0.80%)	(2.70%)
State income taxes, net of federal tax benefit	0.10%	(0.40%)	2.30%
Domestic production activities deduction		(0.30%)	2.30%
Goodwill impairment			(162.10%)
U.S. alternative minimum tax credit			3.70%
Inventory cost capitalization			1.80%
Other, net	0.90%	0.20%	0.50%
Effective tax rate, Total	3.40%	50.90%	21.10%

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