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Income Taxes - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 03, 2016	Oct. 02, 2016	Dec. 31, 2016
Income Taxes [Line Items]
Effective tax rate	18.80%	6.90%	14.70%	3.70%
U.S. statutory federal tax rate	35.00%	35.00%	35.00%		35.00%
Discrete tax expense (benefits)	$ 0.3	$ (6.4)	$ (6.1)		$ (13.3)
Gains (loss) on non-taxable foreign exchange	0.8	(0.7)	1.1		(4.1)
Discrete tax expense (benefits) from reductions in tax reserves	0.2		0.5
Discrete tax benefits, stock based compensation	0.2		6.7
Discrete tax expense, actuarial gains			1.0
Discrete tax benefits, U.S. research and development tax credits			0.7
Out-of-period adjustments		3.1			3.1
Discrete tax benefits related to tax credit carryforwards		1.6			1.6
Discrete tax benefits, Other		$ 1.0			1.0
Tax reserve releases resulting from the settlement of a U.S. tax audit					2.6
Discrete tax benefits, marketable securities					0.9
Uncertain tax positions	44.2		44.2			$ 39.0
Net Increase in uncertain tax positions			5.2
Accrued interest and penalties	$ 0.4		0.4			$ 0.4
Interest and penalties related to income tax, expense (benefit)			0.1		0.3
Tax savings due to the tax holiday			$ 20.5		$ 25.2
Tax savings due to the tax holiday, per share			$ 0.10		$ 0.12
Tax holiday expiration date			December 31, 2020

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