Fair Value Measurements (Narrative) (Details) - USD ($)		3 Months Ended	9 Months Ended
	May 05, 2021	Oct. 31, 2020	Apr. 30, 2021	Jul. 31, 2020
Forward foreign currency exchange contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative instrument term (months)			12 months
Interest rate swaps | Subsequent Event
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Realized gains	$ 2,600,000
Interest rate swaps | Cash Flow Hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Notional amounts		$ 40,000,000.0	$ 25,000,000.0
Maximum length of time hedged in interest rate ( in years)		10 years
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Notional amounts			311,700,000	$ 293,000,000.0
Fair Value, Inputs, Level 2 | Fair Value | Fixed Interest Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt instrument, fair value disclosure			293,300,000	297,300,000
Fair Value, Inputs, Level 2 | Fair Value | Variable Interest Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt instrument, fair value disclosure			186,300,000	350,000,000.0
Fair Value, Inputs, Level 2 | Carrying Value | Fixed Interest Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt instrument, fair value disclosure			275,000,000.0	275,000,000.0
Fair Value, Inputs, Level 2 | Carrying Value | Variable Interest Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Debt instrument, fair value disclosure			186,300,000	350,000,000.0
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Equity method investments			$ 24,200,000	$ 21,700,000