Derivatives and Hedging Activities (Details) (USD $) In Thousands	Jul. 31, 2011	Jul. 31, 2010
Fair Values of derivative instruments in Consolidated Balance Sheets
Derivative asset designated as hedging instrument, fair value	$ 16	$ 156
Derivative asset not designated as hedging instrument, fair value	3	24
Derivative liability designated as hedging instrument, fair value	114,110	98,576
Derivative liability not designated as hedging instrument, fair value	2	64
Foreign Exchange Contract [Member] \| Prepaid expenses and other current assets [Member] \| Cash Flow Hedging [Member]
Fair Values of derivative instruments in Consolidated Balance Sheets
Derivative asset designated as hedging instrument, fair value	16	156
Derivative asset not designated as hedging instrument, fair value	3	24
Prepaid expenses and other current assets [Member] \| Foreign Currency Denominated Debt [Member] \| Net Investment Hedging [Member]
Fair Values of derivative instruments in Consolidated Balance Sheets
Derivative asset designated as hedging instrument, fair value	0	0
Prepaid expenses and other current assets [Member] \| Net Investment Hedging [Member]
Fair Values of derivative instruments in Consolidated Balance Sheets
Derivative asset designated as hedging instrument, fair value	0
Derivative liability designated as hedging instrument, fair value		0
Foreign Exchange Contract [Member] \| Other Current Liabilities [Member]
Fair Values of derivative instruments in Consolidated Balance Sheets
Derivative liability designated as hedging instrument, fair value	5,295
Foreign Exchange Contract [Member] \| Other Current Liabilities [Member] \| Cash Flow Hedging [Member]
Fair Values of derivative instruments in Consolidated Balance Sheets
Derivative liability designated as hedging instrument, fair value	830	829
Derivative liability not designated as hedging instrument, fair value	2	64
Other Current Liabilities [Member] \| Net Investment Hedging [Member]
Fair Values of derivative instruments in Consolidated Balance Sheets
Derivative liability designated as hedging instrument, fair value	5,295	0
Long Term Obligations Less Current Maturities [Member] \| Foreign Currency Denominated Debt [Member] \| Net Investment Hedging [Member]
Fair Values of derivative instruments in Consolidated Balance Sheets
Derivative liability designated as hedging instrument, fair value	$ 107,985	$ 97,747

Fair value of a derivative asset (or nonderivative instrument) that is designated and qualifies as a hedging instrument, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 205G

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44C
-Subparagraph a
-Clause 1

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Fair value of a derivative asset that is not designated or qualifying as a hedging instrument, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

+ References

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- Definition

Fair value of a derivative liability (or nonderivative instrument) that is designated and qualifies as a hedging instrument, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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