Derivatives and Hedging Activities - Fair Value Balance Sheet Disclosure (Detail) - USD ($) $ in Thousands	Jul. 31, 2019	Jul. 31, 2018
Derivatives, Fair Value [Line Items]
Derivatives Assets	$ 474
Other current liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	5	$ 3
Prepaid expenses and other current assets [Member]
Derivatives, Fair Value [Line Items]
Derivatives Assets		1,077
Current maturities on long-term debt [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	50,189
Long-term Debt [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities		52,668
Foreign currency denominated debt [Member] | Designated as hedging instruments [Member] | Other current liabilities [Member] | Net Investment Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	0	0
Foreign currency denominated debt [Member] | Designated as hedging instruments [Member] | Prepaid expenses and other current assets [Member] | Net Investment Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivatives Assets	0	0
Foreign currency denominated debt [Member] | Designated as hedging instruments [Member] | Current maturities on long-term debt [Member] | Net Investment Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	50,189
Foreign currency denominated debt [Member] | Designated as hedging instruments [Member] | Long-term Debt [Member] | Net Investment Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities		52,668
Foreign Exchange Contract [Member] | Not designated as hedging Instruments [Member] | Other current liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	5	3
Foreign Exchange Contract [Member] | Not designated as hedging Instruments [Member] | Prepaid expenses and other current assets [Member]
Derivatives, Fair Value [Line Items]
Derivatives Assets	2	1
Foreign Exchange Contract [Member] | Not designated as hedging Instruments [Member] | Current maturities on long-term debt [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	0
Foreign Exchange Contract [Member] | Not designated as hedging Instruments [Member] | Long-term Debt [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities		0
Foreign Exchange Contract [Member] | Designated as hedging instruments [Member] | Other current liabilities [Member] | Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	0	0
Foreign Exchange Contract [Member] | Designated as hedging instruments [Member] | Prepaid expenses and other current assets [Member] | Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivatives Assets	472	1,076
Foreign Exchange Contract [Member] | Designated as hedging instruments [Member] | Current maturities on long-term debt [Member] | Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities	$ 0
Foreign Exchange Contract [Member] | Designated as hedging instruments [Member] | Long-term Debt [Member] | Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities		$ 0