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Supplementary Balance Sheet Information (Composition Of Property, Plant And Equipment) (Details) (USD $)
In Thousands, unless otherwise specified
Apr. 30, 2013
Jul. 31, 2012
Apr. 30, 2012
Balance Sheet Related Disclosures [Abstract]      
Land and land improvements $ 295,559 $ 281,729 $ 282,038
Buildings and building improvements 852,483 838,780 835,291
Machinery and equipment 599,199 563,309 566,466
Furniture and fixtures 254,671 243,587 240,367
Software 91,987 81,659 80,591
Vehicles 48,592 44,798 44,536
Construction in progress 27,273 36,979 26,341
Gross property, plant and equipment 2,169,764 2,090,841 2,075,630
Accumulated depreciation (1,129,857) (1,041,634) (1,019,387)
Property, plant and equipment, net $ 1,039,907 $ 1,049,207 $ 1,056,243