DERIVATIVES (Derivatives Not Designated as Hedging Instruments) (Details) - USD ($)	12 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Net unrealized holding gain (loss)	$ 35,492,000	$ (12,136,000)	$ (6,000)
Commodity
Derivative Instruments, Gain (Loss) [Line Items]
Net unrealized holding gain (loss)	35,400,000	(12,100,000)	0
Commodity | Cost of goods sold
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) before taxes for derivatives not designated as hedging instruments	$ (18,000,000)	$ (6,000,000)	$ 1,700,000