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Supplementary Balance Sheet Information (Composition Of Property, Plant And Equipment) (Details) - USD ($)
$ in Thousands
Apr. 30, 2020
Jul. 31, 2019
Apr. 30, 2019
Property, Plant and Equipment [Line Items]      
Land and land improvements $ 745,275 $ 619,561 $ 618,545
Buildings and building improvements 1,466,113 1,284,438 1,279,117
Machinery and equipment 1,351,491 1,160,817 1,157,424
Furniture and fixtures 335,827 309,271 304,345
Software 130,354 118,815 118,678
Vehicles 81,408 65,556 63,443
Construction in progress 57,462 79,282 48,728
Gross property, plant and equipment 4,167,930 3,637,740 3,590,280
Accumulated depreciation (1,966,127) (1,795,240) (1,742,846)
Property, plant and equipment, net $ 2,201,803 $ 1,842,500 $ 1,847,434