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Management Incentive Plan and Stock-Based Compensation (Narrative) (Details) - USD ($)
3 Months Ended 9 Months Ended
Oct. 31, 2020
Nov. 02, 2019
Oct. 31, 2020
Nov. 02, 2019
Feb. 01, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Tax benefit related to stock-based compensation $ 5,100,000 $ 5,500,000 $ 15,300,000 $ 14,200,000  
Plan participant's annual percentage ceiling for ESPP (up to, as a percentage) 10.00%   10.00%    
Plan participant's annual dollar amount ceiling for ESPP (up to)     $ 25,000    
Purchase price for shares under the ESPP (as a percentage)     85.00%    
Discount rate under the ESPP (as a percentage)     15.00%    
Restricted stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Treasury shares purchased for tax withholding and available for reissuance (in shares) 142,350 42,300 492,171 612,924  
Restricted Stock and Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unvested restricted stock and performance shares (in shares) 4,263,000   4,263,000   4,394,000
Unamortized compensation expense $ 178,200,000 $ 169,600,000 $ 178,200,000 $ 169,600,000  
Unamortized compensation expense, remaining weighted-average period of recognition     2 years 1 month 6 days 2 years 2 months 12 days  
Minimum | Restricted stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted stock vesting period     3 years    
Minimum | Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Requisite service period     2 years    
Maximum | Restricted stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted stock vesting period     5 years    
Maximum | Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Requisite service period     3 years