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Fair Value Measurements (Narrative) (Details) - USD ($)	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2021
Debt Instrument
Contingent consideration, non current	$ 0		$ 0
Level 3
Debt Instrument
Equity method investments	24,400,000	$ 22,400,000
Fixed Interest Rate \| Level 2 \| Fair Value
Debt Instrument
Debt instrument, fair value disclosure	378,900,000	396,900,000
Fixed Interest Rate \| Level 2 \| Carrying Value
Debt Instrument
Debt instrument, fair value disclosure	425,000,000	425,000,000
Variable Interest Rate \| Level 2 \| Fair Value
Debt Instrument
Debt instrument, fair value disclosure	198,400,000	221,700,000
Variable Interest Rate \| Level 2 \| Carrying Value
Debt Instrument
Debt instrument, fair value disclosure	$ 198,400,000	$ 221,700,000