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Derivative Financial Instruments and Hedging Activities - Purchase and Sale Contracts (Details) - Not Designated as Hedging Instrument t in Thousands, T in Thousands, Bushels in Thousands, Barrels in Thousands	Nov. 30, 2020 Barrels t T Bushels	Aug. 31, 2020 Barrels t T Bushels
Grain and oilseed (bushels) | Long [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | Bushels	890,158	664,673
Grain and oilseed (bushels) | Short [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | Bushels	1,270,756	892,303
Energy products (barrels) | Long [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | Barrels	5,934	10,028
Energy products (barrels) | Short [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | Barrels	8,774	6,570
Processed grain and oilseed (tons) | Long [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	717	657
Processed grain and oilseed (tons) | Short [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	5,378	3,304
Crop nutrients (tons) | Long [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	35	74
Crop nutrients (tons) | Short [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	147	127
Ocean Freight Contracts [Member] | Long [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | t	585	1,140
Ocean Freight Contracts [Member] | Short [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | t	0	95

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- Definition

Nominal number of units used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959

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