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Supplementary Balance Sheet Information (Composition Of Property, Plant And Equipment) (Details) - USD ($)
$ in Thousands
Oct. 31, 2018
Jul. 31, 2018
Oct. 31, 2017
Property, Plant and Equipment [Line Items]      
Land and land improvements $ 611,155 $ 552,271 $ 550,627
Buildings and building improvements 1,271,375 1,193,528 1,186,731
Machinery and equipment 1,054,610 1,007,250 985,639
Furniture and fixtures 295,128 283,694 284,815
Software 113,901 113,699 111,440
Vehicles 63,346 60,697 59,600
Construction in progress 106,378 59,579 77,512
Gross property, plant and equipment 3,515,893 3,270,718 3,256,364
Accumulated depreciation (1,689,911) (1,643,499) (1,561,672)
Property, plant and equipment, net $ 1,825,982 $ 1,627,219 $ 1,694,692