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Income Taxes - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
	Apr. 02, 2017	Apr. 02, 2017	Apr. 03, 2016	Dec. 31, 2016
Income Taxes [Line Items]
Effective tax rate		7.40%	12.60%
U.S. statutory federal tax rate		35.00%	35.00%
Discrete tax benefits		$ 7.0	$ 2.5
Discrete tax benefits, stock based compensation		5.5
Discrete tax benefits, U.S. research and development tax credits		0.7
Discrete tax benefits, other		0.8	0.4
Discrete tax benefits, non-taxable foreign exchange gains			1.2
Discrete tax benefits, marketable securities			0.9
Uncertain tax positions	$ 40.7	40.7		$ 39.0
Net Increase in uncertain tax positions		1.7
Decrease in uncertain tax position resulting from expiration of statutes of limitations	0.8
Accrued interest and penalties	$ 0.3	0.3		$ 0.4
Interest and penalties related to income tax, expense (benefit)		(0.1)	0.3
Tax savings due to the tax holiday		$ 4.7	$ 2.6
Tax savings due to the tax holiday, per share		$ 0.02	$ 0.01
Tax holiday expiration date		December 31, 2020
ASU 2016-09
Income Taxes [Line Items]
Discrete tax benefits, stock based compensation		$ 5.2

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research and development tax credit.

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Income Tax Reconciliation Tax Marketable Securities

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Income Taxes [Line Items]

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The date on which the special tax status will terminate.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible equity-based compensation costs.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in income tax contingencies. Including, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies.

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Amount recognized for uncertainty in income taxes classified as current.

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