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Supplementary Balance Sheet Information (Composition Of Property, Plant And Equipment) (Details) - USD ($)
$ in Thousands
Apr. 30, 2021
Jul. 31, 2020
Apr. 30, 2020
Property, Plant and Equipment [Line Items]      
Land and land improvements $ 761,367 $ 750,714 $ 745,275
Buildings and building improvements 1,502,828 1,475,661 1,466,113
Machinery and equipment 1,432,137 1,361,178 1,351,491
Furniture and fixtures 330,530 308,267 335,827
Software 122,586 104,223 130,354
Vehicles 82,375 80,510 81,408
Construction in progress 46,703 81,967 57,462
Gross property, plant and equipment 4,278,526 4,162,520 4,167,930
Accumulated depreciation (2,161,731) (1,969,841) (1,966,127)
Property, plant and equipment, net $ 2,116,795 $ 2,192,679 $ 2,201,803