XML 79 R48.htm IDEA: XBRL DOCUMENT v3.8.0.1
Earnings Per Share (Narrative) (Details) - Employee Stock Option [Member] - shares
shares in Millions
3 Months Ended
Oct. 29, 2017
Oct. 30, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Stock options not included in the diluted earnings per share calculation as they were antidilutive 1  
Maximum [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Stock options not included in the diluted earnings per share calculation as they were antidilutive   1