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Share-Based Compensation - Narrative (Detail)
$ / shares in Units, $ in Millions
12 Months Ended
Aug. 02, 2018
$ / shares
shares
Jan. 02, 2018
$ / shares
shares
Jan. 03, 2017
$ / shares
shares
Dec. 28, 2018
USD ($)
tranche
$ / shares
shares
Dec. 29, 2017
USD ($)
$ / shares
shares
Dec. 30, 2016
USD ($)
$ / shares
shares
Jan. 01, 2016
shares
Apr. 30, 2014
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Proceeds from stock options exercised | $       $ 0.8 $ 1.6 $ 12.2    
RSUs/PSUs                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Total remaining unrecognized compensation cost related to non-vested stock options | $       $ 11.9        
Compensation cost not yet recognized, period for recognition       1 year 6 months        
Number of shares awarded (shares)       223,531 208,743 427,624    
Price per share (usd per share) | $ / shares       $ 46.10 $ 54.17 $ 49.91    
RSUs/PSUs outstanding (shares)       683,295 761,152 932,036 988,542  
Restricted Stock Units (RSUs)                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Award vesting rights       20.00%        
Award vesting period       4 years        
Number of vesting installments       4 years        
Number of vesting tranches | tranche       1        
PUs                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Award vesting rights       33.00%        
Number of vesting installments       3 years        
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                
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
Number of shares issued per RSU/PSU (in shares)       1        
2014 Omnibus Share Incentive Plan | Restricted Stock Units (RSUs)                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Award vesting rights       20.00%        
Percentage of awards that vest immediately       20.00%        
2014 Omnibus Share Incentive Plan | Maximum                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Options, expiration period       10 years        
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 0 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) 1,687 21,304 14,294          
Price per share (usd per share) | $ / shares $ 49.38 $ 46.93 $ 61.21          
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