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DERIVATIVES (Derivatives Not Designated as Hedging Instruments) (Details) - Commodity - USD ($) | 12 Months Ended
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Aug. 31, 2020 | Aug. 31, 2019 | Aug. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (loss) on commodity derivatives accounted for as cash flow hedging instruments | $ (12,100,000) | $ 0 | $ 0
Cost of goods sold |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain (loss) before taxes for derivatives not designated as hedging instruments | $ (6,000,000.0) | $ 1,700,000 | $ 7,000,000.0

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