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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2019
Interest Rate Swap, Notional Amount	$ 400,000	$ 400,000
Asset impairments	0	28,372	$ 0
Accounts payable and accrued liabilities (Note 8)	815,472	499,108
Advertising expense	38,600	41,600	$ 44,600
Restricted cash	14,612	11,106
Operating right-of-use assets (Note 4)	204,716	225,744
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	12,800	(22,500)
Interest Rate Cash Flow Hedge Liability at Fair Value	12,942	22,510
Operating Lease, Liability	225,582
Operating lease liabilities (Note 4)	190,561	217,542
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	5,400
6.25% Notes [Member]
Debt Instrument, Fair Value Disclosure	638,730
Notes and Loans Payable	600,000
EPR Secured Notes [Member]
Debt Instrument, Fair Value Disclosure	206,025
Notes and Loans Payable	135,711
0.0% Notes
Debt Instrument, Fair Value Disclosure	580,583
Notes and Loans Payable	$ 477,755
Goodwill [Member]
Asset impairments		25,700
Finite-Lived Intangible Assets [Member]
Asset impairments		$ 2,700

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Carrying amount as of the balance sheet date of liabilities incurred (of which invoices have been received and for which invoice have not yet been received or will not be rendered). Includes deferred revenue, accrued interest expense, deposits, accrued salaries, wages and benefits and other accrued liabilities.

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