Derivative Instruments and Hedging Activities (Narrative) (Details) € in Millions, gal in Millions, bu in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2015 USD ($) bu gal	Jun. 24, 2015 EUR (€)	May. 01, 2015 EUR (€)	Dec. 31, 2014 USD ($)
Derivative [Line Items]
Derivative Instruments in Hedges, Net Investment in Foreign Operations, Assets, Fair Value, Net | €			€ 1,000
Interest Rate Derivative Assets, at Fair Value	$ 20
Debt amount designated as a net investment hedge | €		€ 981
Debt Instrument, Interest Rate, Stated Percentage		1.75%
Gain (Loss) on Derivative Used in Net Investment Hedge, Net of Tax	1
Interest Rate Derivative Liabilities, at Fair Value	$ 0
Number of months price risk cash flow hedges gain loss will be recognized in earnings	12 months
Corn processed per month (in bushels) | bu	76
Designated As Hedging Instrument [Member]
Derivative [Line Items]
Interest Rate Derivative Assets, at Fair Value	$ 20			$ 21
Unrealized Gain (Loss) on Price Risk Cash Flow Hedges, after Tax, Accumulated Other Comprehensive Income	22
Interest Rate Derivative Liabilities, at Fair Value				$ 0
After-tax losses in AOCI from commodity cash flow hedge transactions	$ (21)
Corn [Member] | Designated As Hedging Instrument [Member]
Derivative [Line Items]
Historical time period of hedge percentages	12 months
Percentage of anticipated commodity purchases or production hedged during historical hedging period, low end of range (as a percent)	17.00%
Percentage of anticipated commodity purchases or production hedged during historical hedging period, high end of range (as a percent)	60.00%
Percentage of anticipated commodity purchases or production hedged over future hedging period, low end of range (as a percent)	1.00%
Percentage of anticipated commodity purchases or production hedged over future hedging period, high end of range (as a percent)	69.00%
Derivative Hedged Item Time Period	12 months
Ethanol [Member] | Designated As Hedging Instrument [Member]
Derivative [Line Items]
Derivative Hedged Item Past Period of Time Hedged Volumes	12 months
Commodity sales volume hedged during historical hedging period, low end of range (in gallons) | gal	6
Commodity sales volume hedged during historical hedging period, high end of range (in gallons) | gal	95
Derivative Hedged Item Time Period	12 months
Contracted commodity sales volume hedged over future hedging period, low end of range (in gallons) | gal	0
Contracted commodity sales volume hedged over future hedging period, high end of range (in gallons) | gal	78