Income Taxes - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 02, 2017	Jul. 03, 2016	Jul. 02, 2017	Jul. 03, 2016	Dec. 31, 2016
Income Taxes [Line Items]
Effective tax rate	15.40%	3.20%	12.90%	0.00%
U.S. statutory federal tax rate	35.00%	35.00%	35.00%	35.00%
Discrete tax expense (benefits)	$ 0.5	$ (4.4)	$ (6.5)	$ (6.9)
Gains (loss) on non-taxable foreign exchange	0.7	(2.2)	0.3	(3.4)
Discrete tax expense, actuarial gains	1.0		1.0
Discrete tax benefits, stock based compensation	(1.0)		(6.5)
Discrete tax benefits, U.S. research and development tax credits			0.7
Discrete tax benefits, Other		0.4
Discrete tax benefits, marketable securities				0.9
Tax reserve releases resulting from the settlement of a U.S. tax audit		$ 2.6		2.6
Uncertain tax positions	42.5		42.5		$ 39.0
Net Increase in uncertain tax positions			3.5
Decrease in uncertain tax position resulting from expiration of statutes of limitations			0.8
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			$ 15.1	$ 30.7
Tax savings due to the tax holiday, per share			$ 0.07	$ 0.15
Tax holiday expiration date			December 31, 2020