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Stock-based Compensation (Time-Lapse Restricted Stock Units, EPS Performance Restricted Stock Units. FCF Performance Restricted Stock Units, Strategic Performance Restricted Stock Units And TSR Performance Restricted Stock Units) (Details) - $ / shares
shares in Thousands
12 Months Ended
Aug. 02, 2020
Jul. 28, 2019
Jul. 29, 2018
Time Lapse, EPS Performance, FCF Performance And Strategic Performance Restricted Stock Units [Member]      
Stock-based Compensation      
Nonvested at beginning of period, Units 1,960    
Granted, Units 1,157    
Vested, Units (871)    
Forfeited, Units (380)    
Nonvested at end of period, Units 1,866 1,960  
Nonvested at beginning of period, Weighted-Average Grant-Date Fair Value $ 40.57    
Granted, Weighted-Average Grant-Date Fair Value 46.82 $ 36.51 $ 44.18
Vested, Weighted-Average Grant-Date Fair Value 42.80    
Forfeited, Weighted Average Grant Date Fair Value 41.64    
Nonvested at end of period, Weighted-Average Grant-Date Fair Value $ 43.18 $ 40.57  
TSR Performance Restricted Stock/Units [Member]      
Stock-based Compensation      
Nonvested at beginning of period, Units 1,308    
Granted, Units 619    
Vested, Units 0    
Forfeited, Units (673)    
Nonvested at end of period, Units 1,254 1,308  
Nonvested at beginning of period, Weighted-Average Grant-Date Fair Value $ 37.33    
Granted, Weighted-Average Grant-Date Fair Value 63.06 $ 31.29 $ 39.39
Vested, Weighted-Average Grant-Date Fair Value 0    
Forfeited, Weighted Average Grant Date Fair Value 41.43    
Nonvested at end of period, Weighted-Average Grant-Date Fair Value $ 47.83 $ 37.33