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Earnings Per Share (Narrative) (Details) - shares
shares in Thousands
3 Months Ended 9 Months Ended
Apr. 28, 2019
Apr. 29, 2018
Apr. 28, 2019
Apr. 29, 2018
Employee Stock Option [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 2,000 2,000 2,000 1,000