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Supplementary Balance Sheet Information (Composition Of Property, Plant And Equipment) (Details) - USD ($)
$ in Thousands
Jan. 31, 2019
Jul. 31, 2018
Jan. 31, 2018
Property, Plant and Equipment [Line Items]      
Land and land improvements $ 617,492 $ 552,271 $ 559,135
Buildings and building improvements 1,280,972 1,193,528 1,206,465
Machinery and equipment 1,139,443 1,007,250 1,046,134
Furniture and fixtures 323,406 283,694 298,932
Software 122,038 113,699 116,210
Vehicles 65,642 60,697 62,172
Construction in progress 23,342 59,579 25,556
Gross property, plant and equipment 3,572,335 3,270,718 3,314,604
Accumulated depreciation (1,741,248) (1,643,499) (1,612,391)
Property, plant and equipment, net $ 1,831,087 $ 1,627,219 $ 1,702,213