Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jan. 31, 2013
Goodwill [Line Items]
Balance as of July 31, 2012	$ 676,791
Current year acquisitions	189,942
Current year divestitures	(2,882)
Translation adjustments	14,121
Balance as of January 31, 2013	877,972
Americas [Member]
Goodwill [Line Items]
Balance as of July 31, 2012	417,886
Current year acquisitions	189,942
Current year divestitures	(2,882)
Translation adjustments	728
Balance as of January 31, 2013	605,674
EMEA [Member]
Goodwill [Line Items]
Balance as of July 31, 2012	174,868
Current year acquisitions	0
Current year divestitures	0
Translation adjustments	12,635
Balance as of January 31, 2013	187,503
Asia-Pacific [Member]
Goodwill [Line Items]
Balance as of July 31, 2012	84,037
Current year acquisitions	0
Current year divestitures	0
Translation adjustments	758
Balance as of January 31, 2013	$ 84,795