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Stock-Based Awards - Narratives (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jul. 31, 2021
Jul. 25, 2020
Jul. 31, 2021
Jul. 25, 2020
Jan. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Net tax (deficiency) benefit $ 0.2 $ (0.7) $ 2.8 $ (0.2)  
Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation expense related to stock options $ 2.6   2.6    
Total compensation cost not yet recognized, period for recognition 2 years 10 months 24 days        
RSUs          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation expense related to stock options $ 17.1   $ 17.1    
Total compensation cost not yet recognized, period for recognition 2 years 9 months 18 days        
Granted (in shares)     73,036    
Shares outstanding 538,825   538,825   648,361
Shares canceled (in shares)     6,420    
Performance RSUs          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation expense related to stock options $ 2.0   $ 2.0    
Total compensation cost not yet recognized, period for recognition 2 years 2 months 12 days        
Compensation expense $ 28.4   $ 28.4    
Granted (in shares)     272,942    
Shares outstanding 461,734   461,734   425,344
Shares canceled (in shares)     165,662    
Target Share Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
RSUs outstanding (in shares)     187,967    
Shares outstanding 308,573   308,573    
Shares canceled (in shares)     88,057    
Supplemental Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted (in shares)     84,975    
Shares outstanding 153,161   153,161    
Shares canceled (in shares)     74,024