Supplementary Balance Sheet Information (Composition Of Property, Plant And Equipment) (Details) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2015	Jul. 31, 2014	Jan. 31, 2014
Balance Sheet Related Disclosures [Abstract]
Land and land improvements	$ 411,148	$ 348,328	$ 349,532
Buildings and building improvements	959,863	907,280	906,658
Machinery and equipment	774,791	700,745	701,293
Furniture and fixtures	281,869	269,209	275,016
Software	104,511	98,653	99,262
Vehicles	58,760	55,724	55,146
Construction in progress	16,676	31,487	13,244
Gross property, plant and equipment	2,607,618	2,411,426	2,400,151
Accumulated depreciation	(1,323,403)	(1,263,436)	(1,212,362)
Property, plant and equipment, net	$ 1,284,215	$ 1,147,990	$ 1,187,789