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Stock-based Compensation (Tables)
 12 Months Ended
Aug. 02, 2020
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:
 202020192018
Total pre-tax stock-based compensation expense$59 $50 $55 
Tax-related benefits$11 $8 $9 
Total pre-tax stock-based compensation expense and tax-related benefits recognized in Earnings (loss) from discontinued operations were as follows:
 202020192018
Total pre-tax stock-based compensation expense$2 $8 $6 
Tax-related benefits$— $2 $2 
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 August 2, 2020:
OptionsWeighted-
Average
Exercise
Price		Weighted-
Average
Remaining
Contractual
Life		Aggregate
Intrinsic
Value
(Options in
thousands)		 (In years) 
Outstanding at July 28, 20192,059 $46.17 
Granted— $— 
Exercised(481)$47.33 
Terminated(155)$49.46 
Outstanding at August 2, 20201,423 $45.42 6.9$8 
Exercisable at August 2, 2020833 $50.23 6.1$1 
Schedule Of Share Based Payment Award Valuation Assumptions [Table Text Block]
The weighted-average assumptions and grant-date fair values for grants in 2019 and 2018 were as follows:
 20192018
Risk-free interest rate2.79%2.06%
Expected dividend yield3.84%2.95%
Expected volatility25.28%19.60%
Expected term6.1 years6.0 years
Grant-date fair value$6.27$6.67
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 August 2, 2020:
UnitsWeighted-
Average
Grant-Date
Fair Value
 (Restricted stock
units in thousands)		 
Nonvested at July 28, 20191,308 $37.33 
Granted619 $63.06 
Vested— $— 
Forfeited(673)$41.43 
Nonvested at August 2, 20201,254 $47.83 
Schedule Of Share Based Payment Award Valuation Assumptions [Table Text Block]
We estimated the fair value of TSR performance restricted stock units at the grant date using a Monte Carlo simulation. Weighted-average assumptions used in the Monte Carlo simulation were as follows:
 202020192018
Risk-free interest rate1.48%2.80%1.58%
Expected dividend yield2.95%3.79%2.95%
Expected volatility27.01%24.50%19.07%
Expected term3 years3 years3 years
Time Lapse, EPS Performance, FCF Performance And Strategic 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 August 2, 2020:
UnitsWeighted-
Average
Grant-Date
Fair Value
 (Restricted stock
units in thousands)		 
Nonvested at July 28, 20191,960 $40.57 
Granted1,157 $46.82 
Vested(871)$42.80 
Forfeited(380)$41.64 
Nonvested at August 2, 20201,866 $43.18