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Stockholders' Equity (Restricted Stock Activity, Narrative) (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
12 Months Ended
Jan. 30, 2021
Feb. 01, 2020
Feb. 02, 2019
2017 Equity Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for new restricted stock awards (in shares) 10.2    
Restricted stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unamortized compensation expense $ 161.3 $ 158.4  
Weighted average remaining period of unrecognized compensation expense 1 year 10 months 24 days    
Intrinsic value per share, end of period (in dollars per share) $ 111.29    
Intrinsic value, end of period $ 470.8    
Treasury stock shares acquired (in shares) 0.5 0.6 0.7
Treasury stock, number of shares held (in shares) 14.3 13.8  
Restricted stock | 2017 Equity Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for new restricted stock awards (in shares) 10.2 10.7 11.2
Restricted stock | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock vesting period 3 years    
Restricted stock | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock vesting period 5 years