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Accounting Records and Use of Estimates (Tables)
6 Months Ended
Jan. 31, 2020
Accounting Policies [Abstract]  
Schedule of property and equipment depreciation and amortization period

Lives used to determine depreciation and amortization are generally as follows:

       
               Buildings and improvements       18-40 years
    Improvements to leased property 3-10 years
    Fixtures and equipment 7-12 years
    Other 3-5 years