Income Taxes - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2016	Jul. 05, 2015	Jul. 03, 2016	Jul. 05, 2015	Dec. 31, 2015
Income Taxes [Line Items]
Effective tax rate	3.20%	22.10%	0.00%	22.30%
U.S. statutory federal tax rate	35.00%	35.00%	35.00%	35.00%
Discrete tax benefits	$ 4.4		$ 6.9	$ 1.7
Gains on non-taxable foreign exchange	2.2		3.4
Other discrete tax benefits	0.4			1.0
Marketable securities			0.9
Tax reserve releases resulting from the settlement of a U.S. tax audit	2.6		2.6
Discrete tax benefit related to disqualifying dispositions of incentive stock options and employee stock purchase plan shares				0.7
Uncertain tax positions	32.8		32.8		$ 33.7
Net Decrease in uncertain tax positions			(0.9)
Decrease in unrecognized tax benefits			3.6
Accrued interest and penalties	$ 0.8		0.8		$ 0.5
Interest and penalties related to income tax			0.3	0.1
Tax savings due to the tax holiday			$ 30.7	$ 6.2
Tax savings due to the tax holiday, per share			$ 0.15	$ 0.03
Tax holiday expiration date			December 31, 2020