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Supplementary Balance Sheet Information (Composition Of Property, Plant And Equipment) (Details) - USD ($)
$ in Thousands
Apr. 30, 2019
Jul. 31, 2018
Apr. 30, 2018
Property, Plant and Equipment [Line Items]      
Land and land improvements $ 618,545 $ 552,271 $ 553,366
Buildings and building improvements 1,279,117 1,193,528 1,194,877
Machinery and equipment 1,157,424 1,007,250 1,024,483
Furniture and fixtures 304,345 283,694 275,959
Software 118,678 113,699 110,789
Vehicles 63,443 60,697 60,266
Construction in progress 48,728 59,579 35,895
Gross property, plant and equipment 3,590,280 3,270,718 3,255,635
Accumulated depreciation (1,742,846) (1,643,499) (1,614,908)
Property, plant and equipment, net $ 1,847,434 $ 1,627,219 $ 1,640,727