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Summary of Significant Accounting Policies - Purchase and Sales Contracts Outstanding (Details) | Nov. 30, 2013 Barrels Bushels T | Aug. 31, 2013 t Barrels Bushels | Nov. 30, 2012 Bushels t Barrels
--- | --- | --- | ---
Purchase Contracts |  |  |
Purchase and Sales Contracts [Line Items] |  |  |
Grain and oilseed - bushels | 671,414,000 | 521,979,000 | 674,866,000
Energy products - barrels | 27,352,000 | 12,626,000 | 7,483,000
Soy products - tons | 12,000 | 24,000 | 21,000
Crop nutrients - tons | 986,000 | 968,000 | 1,270,000
Ocean and barge freight - metric tons | 2,054,000 | 1,225,000 | 1,288,000
Derivative, Number of Units, Cargo and Freight Rail Contract | 201,000 | 220,000 | 164,000
Derivative, Number of Units, Livestock |  |  | 2,680,000
Sales Contracts |  |  |
Purchase and Sales Contracts [Line Items] |  |  |
Grain and oilseed - bushels | 944,517,000 | 806,295,000 | 1,018,510,000
Energy products - barrels | 33,110,000 | 21,312,000 | 19,817,000
Soy products - tons | 885,000 | 847,000 | 360,000
Crop nutrients - tons | 1,204,000 | 1,050,000 | 1,428,000
Ocean and barge freight - metric tons | 295,000 | 151,000 | 210,000
Derivative, Number of Units, Cargo and Freight Rail Contract | 48,000 | 43,000 | 30,000
Derivative, Number of Units, Livestock | 12,480,000 | 17,280,000 | 3,280,000

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