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Revenue Costs to Obtain Contracts with Customers (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jan. 31, 2021
USD ($)
Jan. 31, 2021
USD ($)
Cost of Revenue [Abstract]    
Capitalized Contract Cost, Net $ 8.6 $ 8.6
Capitalized Contract Cost, Amortization $ 7.4 $ 7.8