Income Taxes - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended			6 Months Ended		12 Months Ended
	Jul. 01, 2018	Dec. 31, 2017	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017	Dec. 31, 2017
Income Taxes [Line Items]
Effective tax rate	15.80%		15.40%	12.90%	12.90%
U.S. statutory federal tax rate	21.00%			21.00%		35.00%
Discrete tax benefits	$ 0.7		$ 6.5	$ 6.7	$ 6.5
Discrete tax benefits, non-taxable foregn exchange gain	0.7		(0.7)	1.1	(0.3)
Discrete tax benefits, net				9.1
Discrete tax expense			0.5	2.4	0.5
Discrete tax benefits, stock based compensation			1.0	7.6	6.5
Discrete tax benefits, other			0.2	0.4	0.6
Discrete tax expense, remeasurement of deferred tax assets				1.7
Discrete tax expenses, Other				0.7
Discrete tax expense, actuarial gains			$ 1.0		1.0
Discrete tax benefits, U.S research and development tax credits					0.7
Uncertain tax positions	37.9	$ 36.3		37.9		$ 36.3
Net Increase in uncertain tax positions	1.6
Accrued interest and penalties	$ 0.3	0.3		0.3		$ 0.3
Interest and penalties related to income tax, expense (benefit)				0.1	0.1
Tax savings due to the tax holiday				$ 4.8	$ 15.1
Tax savings due to the tax holiday, per share				$ 0.02	$ 0.07
Tax holiday expiration date				December 31, 2020
Provisional amount of additional income tax expense		186.0
Transition tax on mandatory deemed repatriation of foreign earnings		161.0
Expense related to remeasurement of deferred tax assets and liabilities		33.6
Benefit associated with impact of correlative adjustments on tax positions		10.3
Expense related to remeasurement of certain deferred		$ 1.7