Income Taxes - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 04, 2015	Sep. 28, 2014	Oct. 04, 2015	Sep. 28, 2014	Oct. 04, 2016	Dec. 31, 2014
Income Taxes [Line Items]
Effective tax rate	18.30%	17.60%	20.90%	15.90%
U.S. statutory federal tax rate			35.00%
Discrete tax benefit (expense) related to non-taxable currency gains	$ 3.3	$ (5.6)	$ 5.0	$ 2.6
Discrete tax benefit attributable to a United States tax court opinion regarding intercompany cost sharing arrangements	1.8		1.8
Decrease in uncertain tax position resulting from expiration of statutes of limitations	0.6		1.3
Other discrete tax benefits	0.9	0.7	1.0	2.0
Discrete tax benefit related to additions to the uncertain tax positions for transfer pricing net		7.2		7.2
Discrete tax benefits resulting from increases in credit carry forwards		$ 0.9		0.9
Discrete tax benefit related to disqualifying dispositions of incentive stock options and employee stock purchase plan shares			0.9	1.7
Uncertain tax positions	$ 33.3		33.3			$ 30.4
Net Increase in uncertain tax positions			2.9
Interest and penalties related to income tax			0.3			$ 0.6
Tax savings due to the tax holiday			$ 9.9	$ 12.3
Tax savings due to the tax holiday, per share			$ 0.05	$ 0.05
Tax holiday expiration date			Dec. 31, 2015
Scenario, Forecast
Income Taxes [Line Items]
Decrease in uncertain tax position resulting from expiration of statutes of limitations					$ 0.1