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Stock-Based Compensation (Narrative) (Details) - USD ($)
3 Months Ended 6 Months Ended
Aug. 04, 2018
Jul. 29, 2017
Aug. 04, 2018
Jul. 29, 2017
Feb. 03, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Tax benefit related to stock-based compensation $ 5,000,000 $ 7,800,000 $ 9,900,000 $ 14,800,000  
Plan participant's annual percentage ceiling for ESPP (up to) 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) 78,151 69,934 661,379 646,747  
Unvested restricted stock (in shares) 4,862,000   4,862,000   5,483,000
Unamortized compensation expense $ 148,300,000 $ 133,600,000 $ 148,300,000 $ 133,600,000  
Unamortized compensation expense, remaining weighted-average period of recognition (in years)     2 years 2 months 12 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 (in years)     3 years    
Minimum | Performance Restricted Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Requisite service period (in years)     2 years    
Maximum | Restricted stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted stock vesting period (in years)     5 years    
Maximum | Performance Restricted Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Requisite service period (in years)     3 years