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DERIVATIVE FINANCIAL INSTRUMENTS - INTEREST RATE SWAP AGREEMENTS (Details) - USD ($)
$ in Millions
6 Months Ended 12 Months Ended
May 01, 2020
Jul. 31, 2020
Jan. 31, 2018
Jan. 31, 2020
DERIVATIVE FINANCIAL INSTRUMENTS        
Reclassification of cash flow hedge gain (loss), after Tax $ 16.0      
Reclassification of cash flow hedge gain (loss), before Tax $ 20.4      
Foreign Exchange Contract        
DERIVATIVE FINANCIAL INSTRUMENTS        
Derivative, remaining maturity   12 months    
Derivative - notional amount   $ 79.7   $ 89.0
2016 Interest Rate Swap        
DERIVATIVE FINANCIAL INSTRUMENTS        
Derivative - notional amount   $ 200.0    
Derivative - fixed interest rate   4.143%    
Derivative - index interest rate floor   0.75%    
Derivative - basis spread on variable rate   2.75%    
Gain on discontinuation of cash flow hedge     $ 0.9  
2018 Interest Rate Swap        
DERIVATIVE FINANCIAL INSTRUMENTS        
Derivative - notional amount   $ 200.0    
Derivative - fixed interest rate   2.949%    
Derivative - index interest rate floor   0.00%