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RETIREMENT AND BENEFIT PLANS Benefit Obligations (Details)
$ in Millions
12 Months Ended
Feb. 04, 2018
USD ($)
Jan. 29, 2017
USD ($)
Jan. 31, 2016
USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Settlement loss on retirement plans $ (9.4) $ 0.0 $ 0.0
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Actuarial loss (gain) $ (2.5) 39.1 20.2
Pension Plans [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Retiree Participants 4,000    
Settlement loss on retirement plans $ 9.4    
Defined Benefit Plan, Lump Sum Settlement Payment (included in benefit payments)   44.8  
Accumulated benefit obligation 595.6 586.0  
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Balance at beginning of year 627.5 651.7  
Service cost 26.3 24.4  
Interest cost 25.7 29.8 27.8
Benefit payments (29.4) (75.6)  
Benefit payments, net of retiree contributions 0.0 0.0  
Plan curtailments (0.3) 0.0  
Plan settlements (65.3) 0.0  
Medicare subsidy 0.0 0.0  
Actuarial loss (gain) 63.5 (2.8)  
Balance at end of year 648.0 627.5 651.7
SERP Plans [Member]      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Accumulated benefit obligation 79.6 71.9  
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Balance at beginning of year 87.6 88.6  
Service cost 4.5 4.3  
Interest cost 3.8 3.9 3.7
Benefit payments (5.1) (8.5)  
Benefit payments, net of retiree contributions 0.0 0.0  
Plan curtailments 0.0 0.0  
Plan settlements 0.0 0.0  
Medicare subsidy 0.0 0.0  
Actuarial loss (gain) 6.1 (0.7)  
Balance at end of year 96.9 87.6 88.6
Postretirement Plans [Member]      
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Balance at beginning of year 11.4 15.8  
Service cost 0.0 0.0  
Interest cost 0.4 0.5 0.6
Benefit payments 0.0 0.0  
Benefit payments, net of retiree contributions (1.6) (1.9)  
Plan curtailments 0.0 0.0  
Plan settlements 0.0 0.0  
Medicare subsidy 0.0 0.0  
Actuarial loss (gain) 0.3 (3.0)  
Balance at end of year $ 10.5 $ 11.4 $ 15.8