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GOODWILL AND INTANGIBLE ASSETS - Schedule of Intangible Assets (Details) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Jan. 30, 2016
May. 02, 2015
Finite-lived Intangible Assets [Roll Forward]    
Gross $ 42.2 $ 42.2
Accumulated Amortization 32.7 30.9
Net 9.5 11.3
Customer relationships and agreements    
Finite-lived Intangible Assets [Roll Forward]    
Gross 16.3 16.3
Accumulated Amortization 15.3 15.0
Net $ 1.0 $ 1.3
Wtd. Avg. Remaining Amortization Periods (Years) 8 years 15 days 8 years 9 months 18 days
Trade names, patents and technology licenses    
Finite-lived Intangible Assets [Roll Forward]    
Gross $ 25.8 $ 25.8
Accumulated Amortization 17.3 15.8
Net $ 8.5 $ 10.0
Wtd. Avg. Remaining Amortization Periods (Years) 2 years 7 months 18 days 3 years 4 months 6 days
Covenants not to compete    
Finite-lived Intangible Assets [Roll Forward]    
Gross $ 0.1 $ 0.1
Accumulated Amortization 0.1 0.1
Net $ 0.0 $ 0.0
Wtd. Avg. Remaining Amortization Periods (Years) 1 year 8 months 2 years 5 months