Related-Party Transactions (Details) - Affiliated Entity	12 Months Ended
	Jul. 31, 2020 USD ($) employee board_seat
Related Party Transaction [Line Items]
Number of Company's board members that hold board seats in Foundation | board_seat	1
Number of board seats in Foundation | employee	3
Maximum charitable cash commitment per quarter | $	$ 5,000,000
Period for quarterly charitable cash commitment	10 years