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Income Taxes - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jul. 05, 2015
Jun. 29, 2014
Jul. 05, 2015
Jun. 29, 2014
Jul. 05, 2015
Dec. 31, 2014
Income Taxes [Line Items]            
Effective tax rate 22.10% 16.60% 22.30% 14.60%    
U.S. statutory federal tax rate     35.00%      
Discrete tax benefit related to non-taxable currency gains     $ 1.7 $ 2.9    
Discrete tax benefit related to disqualifying dispositions of incentive stock options and employee stock purchase plan shares     0.7 1.2    
Other discrete tax benefits     1.0 1.7    
Uncertain tax positions $ 33.3   33.3   $ 33.3 $ 30.4
Net Increase in uncertain tax positions     2.9      
Interest and penalties related to income tax     0.5     $ 0.6
Tax savings due to the tax holiday     $ 6.2 $ 6.1    
Tax savings due to the tax holiday, per share     $ 0.03 $ 0.03    
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         $ 0.5