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Derivatives (Volume of Contracts Outstanding) (Details) lb in Thousands, gal in Thousands, bu in Thousands, T in Thousands | Sep. 30, 2019 lb | Sep. 30, 2019 bu | Sep. 30, 2019 T | Sep. 30, 2019 gal | Dec. 31, 2018 lb | Dec. 31, 2018 bu | Dec. 31, 2018 T | Dec. 31, 2018 gal | Sep. 30, 2018 lb | Sep. 30, 2018 bu | Sep. 30, 2018 T | Sep. 30, 2018 gal
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |  |  |  |  |
Nonmonetary notional amount | 5,385 | 1,258,761 | 3,467 | 421,253 | 2,920 | 506,417 | 66 | 323,975 | 2,560 | 562,872 | 115 | 324,087
Non-exchange Traded |  |  |  |  |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |  |  |  |  |
Nonmonetary notional amount | 5,385 | 842,811 | 3,178 | 262,965 | 2,920 | 313,612 | 66 | 246,863 | 2,560 | 362,632 | 115 | 231,813
Non-exchange Traded | Corn |  |  |  |  |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 653,757 | 0 | 0 | 0 | 250,408 | 0 | 0 | 0 | 277,774 | 0 | 0
Non-exchange Traded | Soybeans |  |  |  |  |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 46,895 | 0 | 0 | 0 | 22,463 | 0 | 0 | 0 | 45,755 | 0 | 0
Non-exchange Traded | Wheat |  |  |  |  |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 90,598 | 0 | 0 | 0 | 14,017 | 0 | 0 | 0 | 7,948 | 0 | 0
Non-exchange Traded | Oats |  |  |  |  |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 36,365 | 0 | 0 | 0 | 26,230 | 0 | 0 | 0 | 31,155 | 0 | 0
Non-exchange Traded | Ethanol |  |  |  |  |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 0 | 0 | 256,815 | 0 | 0 | 0 | 244,863 | 0 | 0 | 0 | 230,813
Non-exchange Traded | Corn oil |  |  |  |  |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |  |  |  |  |
Nonmonetary notional amount | 5,022 | 0 | 0 | 0 | 2,920 | 0 | 0 | 0 | 2,560 | 0 | 0 | 0
Non-exchange Traded | Other |  |  |  |  |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |  |  |  |  |
Nonmonetary notional amount | 363 | 15,196 | 3,178 | 6,150 | 0 | 494 | 66 | 2,000 |  | 0 | 115 | 1,000
Exchange Traded |  |  |  |  |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 415,950 | 289 | 158,288 | 0 | 192,805 | 0 | 77,112 | 0 | 200,240 | 0 | 92,274
Exchange Traded | Corn |  |  |  |  |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 280,890 | 0 | 0 | 0 | 130,585 | 0 | 0 | 0 | 123,250 | 0 | 0
Exchange Traded | Soybeans |  |  |  |  |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 58,980 | 0 | 0 | 0 | 26,985 | 0 | 0 | 0 | 31,855 | 0 | 0
Exchange Traded | Wheat |  |  |  |  |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 75,345 | 0 | 0 | 0 | 33,760 | 0 | 0 | 0 | 44,130 | 0 | 0
Exchange Traded | Oats |  |  |  |  |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 735 | 0 | 0 | 0 | 1,475 | 0 | 0 | 0 | 1,005 | 0 | 0
Exchange Traded | Ethanol |  |  |  |  |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 0 | 0 | 145,769 | 0 | 0 | 0 | 77,112 | 0 | 0 | 0 | 92,274
Exchange Traded | Propane |  |  |  |  |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 0 | 0 | 12,516 |  |  |  |  |  |  |  |
Exchange Traded | Other |  |  |  |  |  |  |  |  |  |  |  |
Amounts of quantities outstanding included in commodity derivative contracts |  |  |  |  |  |  |  |  |  |  |  |
Nonmonetary notional amount | 0 | 0 | 289 | 3 |  |  |  |  |  |  |  |

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