Fair value before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 20

-Section 55

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=28370219&loc=SL20226000-175313

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 20

-Section 50

-Paragraph 3

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=20225523&loc=SL20225862-175312

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (a),(c)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Derivatives and Hedging Activities - Fair Values of Derivative Instruments in Consolidated Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014 Designated as hedging instruments [Member]	Jul. 31, 2013 Designated as hedging instruments [Member]	Apr. 30, 2014 Not designated as hedging Instruments [Member]	Jul. 31, 2013 Not designated as hedging Instruments [Member]	Apr. 30, 2014 Prepaid expenses and other current assets [Member] Foreign exchange contract [Member] Not designated as hedging Instruments [Member]	Jul. 31, 2013 Prepaid expenses and other current assets [Member] Foreign exchange contract [Member] Not designated as hedging Instruments [Member]	Apr. 30, 2014 Other current liabilities [Member] Foreign exchange contract [Member] Not designated as hedging Instruments [Member]	Jul. 31, 2013 Other current liabilities [Member] Foreign exchange contract [Member] Not designated as hedging Instruments [Member]	Apr. 30, 2014 Cash flow hedging Prepaid expenses and other current assets [Member] Foreign exchange contract [Member] Designated as hedging instruments [Member]	Apr. 30, 2014 Cash flow hedging Other current liabilities [Member] Foreign exchange contract [Member] Designated as hedging instruments [Member]	Jul. 31, 2013 Net investment hedging [Member] Prepaid expenses and other current assets [Member] Foreign exchange contract [Member] Designated as hedging instruments [Member]	Apr. 30, 2014 Net investment hedging [Member] Other current liabilities [Member] Foreign exchange contract [Member] Designated as hedging instruments [Member]	Apr. 30, 2014 Net investment hedging [Member] Long term obligations less current maturities [Member] Foreign currency denominated debt [Member] Designated as hedging instruments [Member]	Jul. 31, 2013 Net investment hedging [Member] Long term obligations less current maturities [Member] Foreign currency denominated debt [Member] Designated as hedging instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	$ 403	$ (520)	$ 2,268	$ (478)
Asset Derivatives					34	7	213	287	213	287			34		7
Liability Derivatives					$ 103,662	$ 99,750	$ 47	$ 890			$ 47	$ 890		$ 63		$ 17	$ 103,582	$ 99,750