Goodwill and Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended	6 Months Ended	9 Months Ended
Apr. 30, 2012	Apr. 30, 2012	Apr. 30, 2012 Americas [Member]	Apr. 30, 2012 Europe [Member]	Jan. 31, 2012 Asia-Pacific [Member]	Apr. 30, 2012 Asia-Pacific [Member]
Changes in carrying amount of goodwill
Balance as of July 31, 2011		$ 800,343	$ 425,578	$ 171,238	$ 203,527	$ 203,527
Current year acquisitions		1,227		1,227
Translation adjustments		(19,459)	(5,409)	(10,521)		(3,529)
Impairment charge		(115,688)			(115,688)	(115,688)
Balance as of April 30, 2012	$ 666,423	$ 666,423	$ 420,169	$ 161,944		$ 84,310

The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.

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Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

+ References

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

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- Definition

The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.

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- Definition

The increase (decrease) in the recorded value of goodwill for foreign currency translation adjustments and purchase accounting adjustments needed to revise the carrying amount of goodwill to fair value.

+ References

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

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