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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
3 Months Ended
Nov. 01, 2020
Oct. 27, 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 875  
Vested, Units (715)  
Forfeited, Units (62)  
Nonvested at end of period, Units 1,964  
Nonvested at beginning of period, Weighted-Average Grant-Date Fair Value $ 43.18  
Granted, Weighted-Average Grant-Date Fair Value 48.43 $ 46.79
Vested, Weighted-Average Grant-Date Fair Value 42.82  
Forfeited, Weighted Average Grant Date Fair Value 47.10  
Nonvested at end of period, Weighted-Average Grant-Date Fair Value $ 45.54  
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 (252)  
Nonvested at end of period, Units 1,287  
Nonvested at beginning of period, Weighted-Average Grant-Date Fair Value $ 47.83  
Granted, Weighted-Average Grant-Date Fair Value 54.93 $ 63.06
Vested, Weighted-Average Grant-Date Fair Value 39.39  
Forfeited, Weighted Average Grant Date Fair Value 40.35  
Nonvested at end of period, Weighted-Average Grant-Date Fair Value $ 53.71