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Share-Based Compensation - Narrative (Detail) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Jul. 29, 2015
Feb. 18, 2015
Jan. 02, 2015
Jul. 30, 2014
Jan. 02, 2014
Jan. 01, 2016
Dec. 26, 2014
Dec. 27, 2013
Apr. 30, 2014
Dec. 28, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Excess tax benefit from stock-based compensation           $ 1.4 $ 0.1 $ 0.0    
Proceeds from stock options exercised           35.3 48.9 $ 44.0    
Total intrinsic value of options exercised           14.7 12.0      
Total fair value of options granted           0.0 1.0      
Total fair value of options vested           $ 4.7 $ 5.4      
Total fair value of options vested, weighted average fair value           $ 8.27 $ 8.26      
RSUs/PSUs                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Total remaining unrecognized compensation cost related to non-vested stock options           $ 18.4        
Compensation cost not yet recognized, period for recognition           1 year 11 months        
Number of shares awarded (shares)           471,767 491,398 175,000    
Price per share (usd per share)           $ 36.44 $ 28.44 $ 26.52    
RSUs/PSUs outstanding (shares)           988,542 675,932 325,000   150,000
Stock options                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Total remaining unrecognized compensation cost related to non-vested stock options           $ 2.8        
Compensation cost not yet recognized, period for recognition           1 year 3 months 18 days        
Restricted Stock Units (RSUs)                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Award vesting rights           20.00%        
Maximum | Restricted Stock Units (RSUs)                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Percent of award units granted, range           100.00%        
Minimum | Restricted Stock Units (RSUs)                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Percent of award units granted, range           0.00%        
2014 Omnibus Share Incentive Plan (2014 Plan)                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Maximum number of ordinary shares that may be covered by awards (shares)                 3,000,000  
2014 Omnibus Share Incentive Plan (2014 Plan) | Restricted Stock Units (RSUs)                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of shares awarded (shares) 237,000 50,000   311,000            
Price per share (usd per share) $ 40.03 $ 33.44   $ 29.99            
2011 Omnibus Share Incentive Plan                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Maximum number of ordinary shares that may be granted to a single participant (shares)           0        
2011 Omnibus Share Incentive Plan | Stock options                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Options, expiration period           10 years        
Award vesting period           4 years        
Share Incentive Plan 1999                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Maximum number of ordinary shares that may be granted to a single participant (shares)           0        
Share Incentive Plan 1999 | Stock options                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Options, expiration period           10 years        
Award vesting period           4 years        
Non Employee Directors Plan                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Maximum number of ordinary shares that may be granted to a single participant (shares)           0        
Non Employee Directors Plan | Stock options                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Options, expiration period           10 years        
Award vesting period           4 years        
Non Employee Directors Plan | Restricted Stock                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of shares awarded (shares)     21,875   26,117          
Price per share (usd per share)     $ 33.60   $ 28.15          
Immediate Vesting | Restricted Stock                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Award vesting rights           50.00%        
Immediate Vesting | 2011 Omnibus Share Incentive Plan | Stock options                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Award vesting rights           20.00%        
Immediate Vesting | Share Incentive Plan 1999 | Stock options                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Award vesting rights           20.00%        
Immediate Vesting | Non Employee Directors Plan | Stock options                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Award vesting rights           20.00%        
Six-month Anniversary Upon Ceasing to be Member of Board of Directors | Restricted Stock                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Award vesting period           6 months