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Stock-based Compensation (Time-Lapse Restricted Stock Units, EPS Performance Restricted Stock Units. FCF Performance Restricted Stock Units, And TSR Performance Restricted Stock Units) (Details) - $ / shares
shares in Thousands
12 Months Ended
Aug. 01, 2021
Aug. 02, 2020
Jul. 28, 2019
Time Lapse, EPS Performance, And FCF Performance Restricted Stock Units [Member]      
Stock-based Compensation      
Nonvested at beginning of period, Units 1,866    
Granted, Units 905    
Vested, Units (799)    
Forfeited, Units (158)    
Nonvested at end of period, Units 1,814 1,866  
Nonvested at beginning of period, Weighted-Average Grant-Date Fair Value $ 43.18    
Granted, Weighted-Average Grant-Date Fair Value 48.37 $ 46.82 $ 36.51
Vested, Weighted-Average Grant-Date Fair Value 42.83    
Forfeited, Weighted Average Grant Date Fair Value 46.58    
Nonvested at end of period, Weighted-Average Grant-Date Fair Value $ 45.63 $ 43.18  
TSR Performance Restricted Stock/Units [Member]      
Stock-based Compensation      
Nonvested at beginning of period, Units 1,254    
Granted, Units 521    
Vested, Units (236)    
Forfeited, Units (317)    
Nonvested at end of period, Units 1,222 1,254  
Nonvested at beginning of period, Weighted-Average Grant-Date Fair Value $ 47.83    
Granted, Weighted-Average Grant-Date Fair Value 54.93 $ 63.06 $ 31.29
Vested, Weighted-Average Grant-Date Fair Value 39.39    
Forfeited, Weighted Average Grant Date Fair Value 43.53    
Nonvested at end of period, Weighted-Average Grant-Date Fair Value $ 53.60 $ 47.83