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EQUITY PLANS (Details 4)
$ / shares in Units, $ in Millions
12 Months Ended
Jul. 28, 2018
$ / shares
shares
Jul. 29, 2017
USD ($)
installment
$ / shares
shares
Jul. 30, 2016
USD ($)
$ / shares
shares
Aug. 01, 2015
USD ($)
Restricted stock awards and units        
Number of Shares        
Outstanding at July 30, 2016 (in shares) 1,270,111 733,797    
Granted (in shares)   1,107,526    
Vested (in shares)   (420,098)    
Forfeited (in shares)   (151,114)    
Outstanding at July 29, 2017 (in shares)   1,270,111 733,797  
Weighted Average Grant-Date Fair Value        
Outstanding at July 30, 2016 (in dollars per share) | $ / shares $ 44.56 $ 55.55    
Granted (in dollars per share) | $ / shares   40.16    
Vested (in dollars per share) | $ / shares   50.14    
Forfeited (in dollars per share) | $ / shares   50.16    
Outstanding at July 29, 2017 (in dollars per share) | $ / shares   $ 44.56 $ 55.55  
Intrinsic value | $   $ 10.5 $ 12.3 $ 17.3
Graded vesting period for employees   4 years    
Performance-based share awards        
Number of Shares        
Granted (in shares) 252,290 397,242    
Vested (in shares)   (150,396)    
Weighted Average Grant-Date Fair Value        
Number of additional shares issued if performance exceeded specified targeted levels   221,242    
Performance units        
Weighted Average Grant-Date Fair Value        
Intrinsic value | $     $ 0.0  
Performance Shares Units        
Weighted Average Grant-Date Fair Value        
Granted (in dollars per share) | $ / shares   $ 40.82    
Intrinsic value | $   $ 5.7    
Equity Incentive Plan 2004        
Equity plans        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Installments | installment   4