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Share-Based Compensation - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Aug. 07, 2007
Jan. 02, 2016
Jan. 03, 2015
Dec. 28, 2013
Dec. 31, 2011
Schedule Of Share Based Compensation Arrangements [Line Items]          
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options   $ 22.7      
Percentage of company's total shares outstanding   3.00%     3.00%
Common stock reserved for future issuance   15,900,000      
Unrecognized share-based compensation related to unvested options granted   $ 0.1      
Total fair market value of all vesting options   10.4 $ 11.2 $ 12.3  
Aggregated intrinsic value of options outstanding   147.8      
Aggregated intrinsic value of options exercisable   94.2      
Aggregated intrinsic value of options exercised   $ 26.4 $ 6.6 4.2  
Weighted average remaining contractual term of options outstanding, years price below the market value   5 years 6 months 15 days      
Weighted average remaining contractual term of options exercisable, years     4 years    
Total income tax benefit recognized for share-based compensation expense   $ 3.7 $ 3.7 $ 3.9  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant   4,000,000      
Two Thousand Seven Plan [Member]          
Schedule Of Share Based Compensation Arrangements [Line Items]          
Issuance of options to purchase shares 3,000,000.0        
Expiration period of options 10 years        
Common stock shares added to share reserve 1,700,000.0        
Employee Stock Option [Member]          
Schedule Of Share Based Compensation Arrangements [Line Items]          
Unrecognized share-based compensation related to unvested options granted, term   3 years 3 months 15 days      
Restricted Stock Units (RSUs) [Member]          
Schedule Of Share Based Compensation Arrangements [Line Items]          
Unrecognized share-based compensation related to unvested options granted, term   1 year      
Two Thousand Seven Plan [Member]          
Schedule Of Share Based Compensation Arrangements [Line Items]          
Vesting period of options 5 years        
Two Thousand Seven Plan [Member] | Restricted Stock Units (RSUs) [Member]          
Schedule Of Share Based Compensation Arrangements [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage   25.00%