Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION PLAN (Various Option Plans and Options Outstanding) (Details)

v3.3.1.900
STOCK-BASED COMPENSATION PLAN (Various Option Plans and Options Outstanding) (Details)
$ / shares in Units, $ in Millions
 12 Months Ended
Jan. 30, 2016
USD ($)
$ / shares
shares
Jan. 31, 2015
USD ($)
$ / shares
shares
Feb. 01, 2014
USD ($)
Jan. 28, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]        
Number of options outstanding, beginning balance | shares 491,233      
Options granted | shares 9,158      
Exercised | shares (298,114)      
Forfeited | shares (89,808)      
Number of options outstanding, ending balance | shares 1,549,999 491,233    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]        
Weighted average exercise price per option, outstanding, beginning balance (dollars per share) $ 15.29      
Weighted average exercise price per option granted (dollars per share) 76.10      
Weighted average exercise price per option exercised (dollars per share) 29.39      
Weighted average exercise price per option forfeited (dollars per share) 72.12      
Weighted average exercise price per option, outstanding, ending balance (dollars per share) $ 58.41 $ 15.29    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]        
Weighted average remaining contractual term of options outstanding (in years) 2 years      
Aggregate intrinsic value of options outstanding | $ $ 35.5      
Options vested and expected to vest (shares) | shares 1,036,765      
Options, vested and expected to vest weighted average exercise price (in dollars per share) $ 51.50      
Weighted average remaining contractual term, vested and expected to vest options (in years) 1 year 8 months      
Aggregate intrinsic value, vested and expected to vest options | $ $ 30.9      
Options exercisable at end of period (shares) | shares 1,036,765      
Options exercisable at end of period, weighted average exercise price $ 51.50      
Options exercisable at end of period, weighted average remaining term 1 year 8 months      
Options exercisable at end of period, aggregate intrinsic value | $ $ 30.9      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Beginning of Period [Abstract]        
Compensation Expense | $ $ 52.3 $ 37.4 $ 36.2  
Expected volatility   13.20% 8.80% 11.60%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate   0.00% 0.00% 0.00%
Risk free interest rate   0.20% 0.00% 0.00%
$7.21 to $9.71        
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]        
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit $ 8.64      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit $ 13.90      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Beginning of Period [Abstract]        
Options outstanding | shares 205,519      
Options outstanding, weighted average remaining contractual life (in years) 1 year 9 months      
Options outstanding, weighted average exercise price (dollars per share) $ 10.72      
Options exercisable | shares 205,519      
Options exercisable, weighted average exercise price (dollars per share) $ 10.72      
$9.72 to $14.52        
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]        
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit 13.91      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit $ 48.30      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Beginning of Period [Abstract]        
Options outstanding | shares 75,908      
Options outstanding, weighted average remaining contractual life (in years) 4 years 11 months      
Options outstanding, weighted average exercise price (dollars per share) $ 26.02      
Options exercisable | shares 75,908      
Options exercisable, weighted average exercise price (dollars per share) $ 26.02      
$14.53 to $19.93        
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]        
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit 48.31      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit $ 58.97      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Beginning of Period [Abstract]        
Options outstanding | shares 213,104      
Options outstanding, weighted average remaining contractual life (in years) 2 years 8 months      
Options outstanding, weighted average exercise price (dollars per share) $ 52.06      
Options exercisable | shares 206,436      
Options exercisable, weighted average exercise price (dollars per share) $ 51.89      
$19.94 to $28.36        
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]        
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit 58.98      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit $ 68.92      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Beginning of Period [Abstract]        
Options outstanding | shares 679,606      
Options outstanding, weighted average remaining contractual life (in years) 1 year 4 months      
Options outstanding, weighted average exercise price (dollars per share) $ 68.27      
Options exercisable | shares 432,344      
Options exercisable, weighted average exercise price (dollars per share) $ 68.38      
$28.37 to $70.38        
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]        
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit 68.93      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit $ 81.30      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Beginning of Period [Abstract]        
Options outstanding | shares 375,862      
Options outstanding, weighted average remaining contractual life (in years) 2 years 8 months      
Options outstanding, weighted average exercise price (dollars per share) $ 76.80      
Options exercisable | shares 116,558      
Options exercisable, weighted average exercise price (dollars per share) $ 76.64      
$7.21 to $70.38        
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]        
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit 8.64      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit $ 81.30      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Beginning of Period [Abstract]        
Options outstanding | shares 1,549,999      
Options outstanding, weighted average remaining contractual life (in years) 2 years      
Options outstanding, weighted average exercise price (dollars per share) $ 58.41      
Options exercisable | shares 1,036,765      
Options exercisable, weighted average exercise price (dollars per share) $ 51.50      
Employee Stock Option [Member]        
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term   2 years 10 days    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Beginning of Period [Abstract]        
Expected volatility   20.77%    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate   0.00%    
Risk free interest rate   0.60%    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value   $ 23.15    
Employee Stock Option [Member] | Family Dollar [Member]        
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]        
Conversion of Stock, Award Exchange Ratio 1.0000      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Beginning of Period [Abstract]        
Conversion of Stock, Shares Converted | shares 1,500,000      
Compensation Expense | $ $ 6.2      
Family Dollar [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]        
Options granted | shares 1,437,530      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]        
Weighted average exercise price per option granted (dollars per share) $ 67.87