Supplementary Balance Sheet Information (Composition Of Goodwill And Intangible Assets) (Details) - USD ($) $ in Thousands	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013
Balance Sheet Related Disclosures [Abstract]
Goodwill	$ 517,787	$ 395,502
Accumulated amortization	(17,354)	(17,354)
Goodwill, net	500,433	378,148	$ 381,699
Gross indefinite-lived intangible assets	105,150	100,834
Accumulated amortization	(24,713)	(24,713)
Indefinite-lived intangible assets, net	80,437	76,121
Gross amortizable intangible assets	118,482	91,233
Accumulated amortization	(54,770)	(49,831)
Amortizable intangible assets, net	63,712	41,402
Total gross intangible assets	223,632	192,067
Total accumulated amortization	(79,483)	(74,544)
Net Intangible Assets Excluding Goodwill	$ 144,149	$ 117,523