Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Aug. 31, 2020	Aug. 31, 2019
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 9,660,626	$ 9,467,238
Less accumulated depreciation and amortization	4,702,688	4,378,530
Total property, plant and equipment	4,957,938	5,088,708
Land and land improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	317,714	319,452
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,110,490	1,079,073
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	7,559,437	7,392,767
Office equipment and other
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	362,084	346,649
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 310,901	$ 329,297