Derivative Financial Instruments (Schedule Of Volumes Of Open Commodity Derivative Positions) (Details)	Jun. 30, 2012
Corn Soybeans And Wheat In Bushels [Member] | Futures [Member] | Exchange Traded Net Long & Short [Member]
Derivative [Line Items]
Volumes of open commodity derivatives	(18,355,000)	[1]
Corn Soybeans And Wheat In Bushels [Member] | Forwards [Member] | Non-Exchange Traded Long [Member]
Derivative [Line Items]
Volumes of open commodity derivatives	19,263,000
Corn Soybeans And Wheat In Bushels [Member] | Forwards [Member] | Non-Exchange Traded Short [Member]
Derivative [Line Items]
Volumes of open commodity derivatives	(8,768,000)	[2]
Ethanol In Gallons [Member] | Futures [Member] | Exchange Traded Net Long & Short [Member]
Derivative [Line Items]
Volumes of open commodity derivatives	(32,720,000)	[1]
Ethanol In Gallons [Member] | Options [Member] | Exchange Traded Net Long & Short [Member]
Derivative [Line Items]
Volumes of open commodity derivatives	(9,889,000)	[1]
Ethanol In Gallons [Member] | Forwards [Member] | Non-Exchange Traded Long [Member]
Derivative [Line Items]
Volumes of open commodity derivatives	52,420,000
Ethanol In Gallons [Member] | Forwards [Member] | Non-Exchange Traded Short [Member]
Derivative [Line Items]
Volumes of open commodity derivatives	(202,806,000)	[2]
Corn And Soybeans In Bushels [Member] | Options [Member] | Exchange Traded Net Long & Short [Member]
Derivative [Line Items]
Volumes of open commodity derivatives	(2,004,000)	[1]
Crude Oil In Barrels [Member] | Futures [Member] | Exchange Traded Net Long & Short [Member]
Derivative [Line Items]
Volumes of open commodity derivatives	(30,000)	[1]
Crude Oil In Barrels [Member] | Options [Member] | Exchange Traded Net Long & Short [Member]
Derivative [Line Items]
Volumes of open commodity derivatives	(35,000)	[1]
Crude Oil In Barrels [Member] | Forwards [Member] | Non-Exchange Traded Long [Member]
Derivative [Line Items]
Volumes of open commodity derivatives	30,000
Distillers Grains In Tons [Member] | Forwards [Member] | Non-Exchange Traded Long [Member]
Derivative [Line Items]
Volumes of open commodity derivatives	17,000
Distillers Grains In Tons [Member] | Forwards [Member] | Non-Exchange Traded Short [Member]
Derivative [Line Items]
Volumes of open commodity derivatives	(142,000)	[2]
Cash Flow Hedges [Member] | Corn In Bushels [Member] | Futures [Member] | Exchange Traded Net Long & Short [Member]
Derivative [Line Items]
Volumes of open commodity derivatives	29,920,000	[1],[3]
Cash Flow Hedges [Member] | Ethanol In Gallons [Member] | Futures [Member] | Exchange Traded Net Long & Short [Member]
Derivative [Line Items]
Volumes of open commodity derivatives	(100,800,000)	[1],[3]

[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] Non-exchange traded forwards are presented on a gross long and (short) position basis.

[3] Futures used for cash flow hedges.