Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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Period remaining until the derivative contract matures, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Derivatives and Hedging Activities - Additional Information (Detail) € in Thousands, £ in Thousands, $ in Thousands	12 Months Ended
	Jul. 31, 2015 USD ($)	Jul. 31, 2014 USD ($)	Jul. 31, 2013 USD ($)	Jul. 31, 2015 GBP (£)	Jul. 31, 2014 EUR (€)	May. 13, 2010 EUR (€)
Derivatives, Fair Value [Line Items]
Derivative maturity	18 months
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimate of Time to Transfer	12 months
Reclassification adjustment for (gains) losses included in net income	$ (1,325)	$ (147)	$ (578)
Accumulated other comprehensive (loss) income	(45,034)	64,156	56,063
Foreign Exchange Forward [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 139,300	104,000
Foreign exchange contract [Member]
Derivatives, Fair Value [Line Items]
Derivative maturity	18 months
Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 33,223	0
Not designated as hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	1,705	1,147
Derivative Liability, Fair Value, Gross Liability	543	375
Asset Derivatives	168	166
Designated as hedging instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	122,251	100,424
Asset Derivatives	518	0
Designated as hedging instruments [Member] \| Net Investment Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	0	5,300
Foreign exchange contracts	(45)	(265)
Designated as hedging instruments [Member] \| Net Investment Hedging [Member] \| GBP-denominated interco debt [Member]
Derivatives, Fair Value [Line Items]
Net investment hedges to hedge portions of net investment \| £				£ 25,000
Foreign exchange contracts	889	2,271
Designated as hedging instruments [Member] \| Net Investment Hedging [Member] \| EUR denominated unsecured debt [Domain]
Derivatives, Fair Value [Line Items]
Net investment hedges to hedge portions of net investment \| €						€ 75,000
Accumulated other comprehensive (loss) income	12,512				€ (5,495)
Foreign exchange contracts	18,008	(660)	(7,470)
Designated as hedging instruments [Member] \| Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Reclassification adjustment for (gains) losses included in net income	(1,325)	(147)	$ (578)
Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months	(297)	21
Other current liabilities [Member] \| Not designated as hedging Instruments [Member] \| Foreign exchange contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	543	375
Prepaid expenses and other current assets [Member] \| Not designated as hedging Instruments [Member] \| Foreign exchange contract [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	168	166
Cash Flow Hedging [Member] \| Other current liabilities [Member] \| Designated as hedging instruments [Member] \| Foreign exchange contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	737	0
Cash Flow Hedging [Member] \| Prepaid expenses and other current assets [Member] \| Designated as hedging instruments [Member] \| Foreign exchange contract [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	518	0
Net Investment Hedging [Member] \| Other current liabilities [Member] \| Designated as hedging instruments [Member] \| Foreign exchange contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	0	14
Net Investment Hedging [Member] \| Prepaid expenses and other current assets [Member] \| Designated as hedging instruments [Member] \| Foreign exchange contract [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 0	$ 0