SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Property, Plant and Equipment (Details)	12 Months Ended
	Jul. 31, 2016
Minimum | Buildings and leasehold improvements
Property, Plant and Equipment
Estimated useful life	3 years
Minimum | Machinery and Equipment - Packaging
Property, Plant and Equipment
Estimated useful life	2 years
Minimum | Machinery and Equipment - Processing
Property, Plant and Equipment
Estimated useful life	2 years
Minimum | Machinery and Equipment - Mining and Other
Property, Plant and Equipment
Estimated useful life	3 years
Minimum | Office furniture and equipment
Property, Plant and Equipment
Estimated useful life	2 years
Minimum | Vehicles
Property, Plant and Equipment
Estimated useful life	3 years
Maximum | Buildings and leasehold improvements
Property, Plant and Equipment
Estimated useful life	39 years
Maximum | Machinery and Equipment - Packaging
Property, Plant and Equipment
Estimated useful life	20 years
Maximum | Machinery and Equipment - Processing
Property, Plant and Equipment
Estimated useful life	25 years
Maximum | Machinery and Equipment - Mining and Other
Property, Plant and Equipment
Estimated useful life	15 years
Maximum | Office furniture and equipment
Property, Plant and Equipment
Estimated useful life	12 years
Maximum | Vehicles
Property, Plant and Equipment
Estimated useful life	15 years