Supplementary Balance Sheet Information (Components Of Accounts Payable And Accrued Liabilities) (Details) - USD ($) $ in Thousands	Jan. 31, 2023	Jul. 31, 2022	Jan. 31, 2022
Balance Sheet Related Disclosures [Abstract]
Trade payables	$ 179,221	$ 151,263	$ 137,895
Deferred revenue	619,511	511,306	611,477
Accrued salaries, wages and deferred compensation	54,129	45,202	46,894
Accrued benefits	81,612	37,731	80,547
Deposits	66,275	64,570	59,008
Operating Lease, Liability, Current	36,667	34,218	35,438
Other liabilities	107,380	98,540	95,878
Total accounts payable and accrued liabilities	$ 1,144,795	$ 942,830	$ 1,067,137