Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION PLAN (Narrative) (Details)

v3.8.0.1
STOCK-BASED COMPENSATION PLAN (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Mar. 18, 2016
Feb. 03, 2018
Jan. 28, 2017
Jan. 30, 2016
Jan. 31, 2015
Feb. 02, 2013
Jan. 28, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Expected term         3 months 3 months 3 months
Intrinsic value of options exercised   $ 18.3 $ 11.8 $ 13.2      
Minimum statutory tax withholding related to vested restricted shares   27.4 21.9 21.6      
Stock-based compensation expense   $ 65.8 60.3 52.3      
Granted (shares)   890,371          
Total fair value of vested restricted shares   $ 60.3 $ 42.4 $ 36.8      
Aggregate intrinsic value of options outstanding   $ 20.2          
Employee Stock Option [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Expected term   6 years 6 months 2 years 11 days        
Service Based Awards [Member] | Restricted Stock Units (RSUs) [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period   3 years          
Restricted stock granted under service and performance awards (in shares)   500,000 500,000 300,000      
Stock-based compensation expense   $ 32.2 $ 28.2 $ 22.6      
Unrecognized compensation expense   $ 35.6          
Weighted average period of recognition (in months)   1 year 10 months 9 days          
Director Deferred Compensation Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Expected term       10 years      
Percentage of the share price of common stock used in the calculation to determine the number of options issued to a director (in hundredths)       33.00%      
Omnibus Incentive Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period       3 years      
Expected term       10 years      
Shares available for grant       4,000,000      
Omnibus Incentive Plan [Member] | Certain officers [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Options granted (in shares)     200,000.0        
Fair value of stock options granted     $ 4.0        
Omnibus Incentive Plan [Member] | Employee Stock Option [Member] | Certain officers [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period     5 years        
Stock-based compensation expense   $ 1.3          
Omnibus Incentive Plan [Member] | Service Based Awards [Member] | Ratable Annual Vesting [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Compensation expensed over the service period     $ 7.9        
Omnibus Incentive Plan [Member] | Performance And Service Based Awards [Member] | Ratable Annual Vesting [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Restricted stock granted under service and performance awards (in shares)   300,000 200,000        
Compensation expensed over the service period   $ 19.7 $ 17.1        
Stock-based compensation expense     $ 11.4        
Service period   3 years 3 years        
Omnibus Incentive Plan [Member] | Performance And Service Based Awards [Member] | Certain officers [Member] | Ratable Annual Vesting [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Restricted stock granted under service and performance awards (in shares)       100,000      
Compensation expensed over the service period       $ 11.3      
Allocated Share Based Compensation Expense Restricted Stock2012 Grants   $ 1.0 $ 1.8 $ 8.7      
Service period       3 years      
Omnibus Incentive Plan [Member] | Performance And Service Based Awards [Member] | President [Member] | Ratable Annual Vesting [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period 5 years            
Stock-based compensation expense   1.0 0.8        
Granted (shares) 100,000            
Target Value $ 5.0            
Service period 5 years            
Omnibus Incentive Plan [Member] | Performance And Service Based Awards [Member] | Chief Executive Officer [Member] | Ratable Annual Vesting [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Restricted stock granted under service and performance awards (in shares)           200,000  
Stock-based compensation expense   $ 0.7 $ 2.0 $ 2.0      
Target Value           $ 10.0  
Service period     5 years        
Omnibus Incentive Plan [Member] | Performance And Service Based Awards [Member] | Restricted Stock Units (RSUs) [Member] | Certain officers [Member] | Vesting at End of Performance Period [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Individual potential target award, minimum (in hundredths)       0.00% 0.00%    
Individual Potential Target Award Maximum       200.00% 200.00%    
Omnibus Incentive Plan [Member] | Performance Shares [Member] | Restricted Stock Units (RSUs) [Member] | Certain officers [Member] | Vesting at End of Performance Period [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Target Value       $ 2.3 $ 1.7    
Employee Stock Purchase Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Weighted average fair value of granted purchase rights (in dollars per share)   $ 13,620,000.00 $ 13,430,000.00 $ 11,650,000.00      
Stock-based compensation expense   $ 2.0 $ 1.6 $ 1.0      
Employee stock purchase plan shares of common stock authorized for issuance   8,707,692          
Amount allowed to be withheld to purchase Common Stock   10.00%          
ESPP Plan purchase price of stock (in hundredths)   85.00%          
Shares sold under the ESPP   5,138,468          
2016 Restricted Stock Grant - Officers [Member] | Omnibus Incentive Plan [Member] | Performance And Service Based Awards [Member] | Certain officers [Member] | Ratable Annual Vesting [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation expense   $ 13.7          
2016 Restricted Stock Grant - Officers [Member] | Omnibus Incentive Plan [Member] | Performance And Service Based Awards [Member] | Restricted Stock Units (RSUs) [Member] | Certain officers [Member] | Vesting at End of Performance Period [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Target Value   $ 4.6          
Individual potential target award, minimum (in hundredths)   0.00%          
Individual Potential Target Award Maximum   200.00%          
2016 Restricted Stock Grant - Officers [Member] | Omnibus Incentive Plan [Member] | Performance Shares [Member] | Restricted Stock Units (RSUs) [Member] | Certain officers [Member] | Vesting at End of Performance Period [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation expense   $ 2.6          
2015 Restricted Stock Grant - Officers [Member] | Omnibus Incentive Plan [Member] | Performance And Service Based Awards [Member] | Certain officers [Member] | Ratable Annual Vesting [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation expense   2.0          
2015 Restricted Stock Grant - Officers [Member] | Omnibus Incentive Plan [Member] | Performance And Service Based Awards [Member] | Restricted Stock Units (RSUs) [Member] | Certain officers [Member] | Vesting at End of Performance Period [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Target Value     $ 3.2        
Individual potential target award, minimum (in hundredths)     0.00%        
Individual Potential Target Award Maximum     200.00%        
2015 Restricted Stock Grant - Officers [Member] | Omnibus Incentive Plan [Member] | Performance Shares [Member] | Restricted Stock Units (RSUs) [Member] | Certain officers [Member] | Vesting at End of Performance Period [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation expense   0.5 $ 2.0        
Fair value of stock options granted   3.2          
2014 Restricted Stock Grant - Officers [Member] | Omnibus Incentive Plan [Member] | Performance Shares [Member] | Restricted Stock Units (RSUs) [Member] | Certain officers [Member] | Vesting at End of Performance Period [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation expense   0.8 2.3 1.4      
Family Dollar [Member] | Employee Stock Option [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation expense   $ 1.3 2.6 6.2      
Conversion of Stock, Award Exchange Ratio   1.0000          
Conversion of Stock, Shares Converted   1,500,000          
Family Dollar [Member] | Restricted Stock Units (RSUs) [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation expense   $ 0.7 $ 1.8 2.8      
Conversion of Stock, Award Exchange Ratio   1.0000          
Conversion of Stock, Shares Converted   100,000          
2013 LTPP REGRANT [Member] | Omnibus Incentive Plan [Member] | Performance And Service Based Awards [Member] | Restricted Stock Units (RSUs) [Member] | Certain officers [Member] | Vesting at End of Performance Period [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period     1 year        
Stock-based compensation expense     $ 0.2 2.4      
Target Value     2.2        
2013 ORIGINAL LTPP GRANT [Member] | Omnibus Incentive Plan [Member] | Performance And Service Based Awards [Member] | Restricted Stock Units (RSUs) [Member] | Certain officers [Member] | Vesting at End of Performance Period [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation expense     $ 1.2        
Family Dollar [Member] | Service Based Awards [Member] | Restricted Stock Units (RSUs) [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Vesting period     3 years        
Stock-based compensation expense   $ 1.6 $ 2.0 $ 1.0      
Granted (shares)     100,000