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Supplementary Balance Sheet Information (Composition Of Property, Plant And Equipment) (Details) - USD ($)
$ in Thousands
12 Months Ended
Jul. 31, 2020
Jul. 31, 2019
Jul. 31, 2018
Balance Sheet Related Disclosures [Abstract]      
Depreciation $ 243,100 $ 210,700 $ 199,200
Land and land improvements 750,714 619,561  
Buildings and building improvements 1,475,661 1,284,438  
Machinery and equipment 1,361,178 1,160,817  
Furniture and fixtures 308,267 309,271  
Software 104,223 118,815  
Vehicles 80,510 65,556  
Construction in progress 81,967 79,282  
Gross property, plant and equipment 4,162,520 3,637,740  
Accumulated depreciation (1,969,841) (1,795,240)  
Property, plant and equipment, net $ 2,192,679 $ 1,842,500