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Derivative Financial Instruments (Schedule Of Volumes Of Open Commodity Derivative Positions) (Details) contract in Thousands | Mar. 31, 2017 contract
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Corn, Soybeans And Wheat In Bushels [Member] | Exchange Traded [Member] | Long [Member] | Options [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 1,414 | [1]
Corn, Soybeans And Wheat In Bushels [Member] | Exchange Traded [Member] | Short [Member] | Futures [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 72,350 | [1]
Corn In Bushels [Member] | Exchange Traded [Member] | Long [Member] | Cash Flow Hedges [Member] | Futures [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 340 | [1],[2]
Corn In Bushels [Member] | Exchange Traded [Member] | Long [Member] | Fair Value Hedging [Member] | Futures [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 21,915 | [1],[3]
Ethanol In Gallons [Member] | Exchange Traded [Member] | Long [Member] | Futures [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 164,112 | [1]
Ethanol In Gallons [Member] | Exchange Traded [Member] | Short [Member] | Options [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 22,203 | [1]
Ethanol In Gallons [Member] | Exchange Traded [Member] | Short [Member] | Cash Flow Hedges [Member] | Futures [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 5,880 | [1],[2]
Ethanol In Gallons [Member] | Exchange Traded [Member] | Short [Member] | Fair Value Hedging [Member] | Futures [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 12,390 | [1],[3]
Ethanol In Gallons [Member] | Non-Exchange Traded [Member] | Long [Member] | Forwards [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 34,105 | [3],[4]
Ethanol In Gallons [Member] | Non-Exchange Traded [Member] | Short [Member] | Forwards [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 337,535 | [3],[4]
Natural Gas In mmBTU [Member] | Exchange Traded [Member] | Short [Member] | Futures [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 1,470 | [1]
Natural Gas In mmBTU [Member] | Exchange Traded [Member] | Short [Member] | Fair Value Hedging [Member] | Futures [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 6,660 | [1],[3]
Natural Gas In mmBTU [Member] | Non-Exchange Traded [Member] | Long [Member] | Forwards [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 18,246 | [3],[4]
Natural Gas In mmBTU [Member] | Non-Exchange Traded [Member] | Short [Member] | Forwards [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 1,599 | [3],[4]
Livestock in Pounds [Member] | Exchange Traded [Member] | Long [Member] | Futures [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 6,800 | [1]
Livestock in Pounds [Member] | Exchange Traded [Member] | Short [Member] | Options [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 4,718 | [1]
Livestock in Pounds [Member] | Exchange Traded [Member] | Short [Member] | Cash Flow Hedges [Member] | Futures [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 123,240 | [1],[2]
Crude Oil In Barrels [Member] | Exchange Traded [Member] | Long [Member] | Options [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 120 | [1]
Crude Oil In Barrels [Member] | Exchange Traded [Member] | Short [Member] | Futures [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 229 | [1]
Crude Oil In Barrels [Member] | Exchange Traded [Member] | Short [Member] | Fair Value Hedging [Member] | Futures [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 43 | [1],[3]
Crude Oil In Barrels [Member] | Non-Exchange Traded [Member] | Long [Member] | Forwards [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 873 | [3],[4]
Crude Oil In Barrels [Member] | Non-Exchange Traded [Member] | Short [Member] | Forwards [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 670 | [3],[4]
Denaturant In Gallons [Member] | Exchange Traded [Member] | Long [Member] | Cash Flow Hedges [Member] | Futures [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 3,444 | [1],[2]
Corn And Soybeans In Bushels [Member] | Non-Exchange Traded [Member] | Long [Member] | Forwards [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 18,298 | [3],[4]
Corn And Soybeans In Bushels [Member] | Non-Exchange Traded [Member] | Short [Member] | Forwards [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 1,751 | [3],[4]
Distillers Grains In Tons [Member] | Non-Exchange Traded [Member] | Long [Member] | Forwards [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 105 | [3],[4]
Distillers Grains In Tons [Member] | Non-Exchange Traded [Member] | Short [Member] | Forwards [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 323 | [3],[4]
Corn Oil in Pounds [Member] | Non-Exchange Traded [Member] | Long [Member] | Forwards [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 30,437 | [3],[4]
Corn Oil in Pounds [Member] | Non-Exchange Traded [Member] | Short [Member] | Forwards [Member] |  |
Derivative [Line Items] |  |
Volumes of open commodity derivatives | 152,923 | [3],[4]
[1] | Exchange traded futures and options are presented on a net long and (short) position basis. Options are presented on a delta-adjusted basis.
[2] | Futures used for cash flow hedges.
[3] | Futures or non-exchange traded forwards used for fair value hedges.
[4] | Non-exchange traded forwards are presented on a gross long and (short) position basis including both fixed-price and basis contracts.

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