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Fair Value Measurements (Details) - USD ($)
$ in Thousands
Jul. 31, 2022
Jul. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents, at Carrying Value $ 1,236,990 $ 754,300
Cash equivalents, at Fair Value 1,237,337 754,304
Total Assets, at Carrying Value 1,236,990 754,300
Total Assets, at Fair Value 1,237,337 754,304
Total Liabilities, at Carrying Value 0 399,733
Total Liabilities, at Fair Value 0 432,027
Fixed Rate Debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term fixed rate debt, including current portion, at Carrying Value 0 399,733
Long-term fixed rate debt, including current portion, at Fair Value $ 0 $ 432,027