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Stock-based Compensation (Tables)
 3 Months Ended
Oct. 31, 2021
Stock-based Compensation  
Summary of Stock-based Compensation Expense [Table Text Block] Total pre-tax stock-based compensation expense and tax-related benefits recognized in Earnings from continuing operations were as follows:
Three Months Ended
 October 31, 2021November 1, 2020
Total pre-tax stock-based compensation expense$14 $16 
Tax-related benefits$2 $3 
Share-based Payment Arrangement, Option [Member]  
Stock-based Compensation  
Schedule Of Stock Option Activity [Table Text Block]
The following table summarizes stock option activity as of October 31, 2021:
OptionsWeighted-
Average
Exercise
Price		Weighted-
Average
Remaining
Contractual
Life		Aggregate
Intrinsic
Value
(Options in
thousands)		 (In years) 
Outstanding at August 1, 20211,372 $45.61 
Granted— $— 
Exercised(32)$36.60 
Terminated— $— 
Outstanding at October 31, 20211,340 $45.83 5.6$2 
Exercisable at October 31, 20211,129 $47.84 5.3$1 
Time Lapse, EPS Performance, And FCF Performance Restricted Stock Units [Member]  
Stock-based Compensation  
Time-Lapse Restricted Stock Units, EPS Performance Restricted Stock Units and FCF Performance Restricted Stock Units[Table Text Block]
The following table summarizes time-lapse restricted stock units, EPS performance restricted stock units and FCF performance restricted stock units as of October 31, 2021:
UnitsWeighted-Average Grant-Date Fair Value
 (Restricted stock
units in thousands)		 
Nonvested at August 1, 20211,814 $45.63 
Granted1,393 $41.82 
Vested(1,129)$43.98 
Forfeited(63)$45.48 
Nonvested at October 31, 20212,015 $43.93 
TSR Performance Restricted Stock/Units [Member]  
Stock-based Compensation  
TSR Performance Restricted Stock Units [Table Text Block]
The following table summarizes TSR performance restricted stock units as of October 31, 2021:
UnitsWeighted-Average Grant-Date Fair Value
 (Restricted stock
units in thousands)		 
Nonvested at August 1, 20211,222 $53.60 
Granted324 $45.65 
Vested(178)$31.33 
Forfeited(113)$43.12 
Nonvested at October 31, 20211,255 $55.65 
Schedule Of Share Based Payment Award Valuation Assumptions [Table Text Block]
Assumptions used in the Monte Carlo simulation were as follows:
 20222021
Risk-free interest rate0.45%0.15%
Expected dividend yield3.50%2.85%
Expected volatility27.43%29.99%
Expected term3 years3 years