Derivative Instruments and Hedging Activities (Narrative) (Details) gal in Millions, bu in Millions, $ in Millions	12 Months Ended
Dec. 31, 2019 USD ($) bu gal	Dec. 31, 2018 USD ($)
Derivative [Line Items]
Derivatives used in Net Investment Hedge, Net of Tax	$ (6)
Unrealized gain (loss) on interest rate cash flow hedges, after-tax, AOCI	43
Notional Amount of Nonderivative Instruments	1,700	$ 1,100
Foreign Debt used in Net Investment Hedge, Net of Tax	(7)	26
Designated As Hedging Instrument [Member]
Derivative [Line Items]
Interest Rate Derivative Assets, at Fair Value	3	0
Interest Rate Derivative Liabilities, at Fair Value	43	20
After-tax gain (losses) in AOCI from commodity cash flow hedge transactions	(5)	31
After-tax gain (losses) in AOCI from commodity cash flow hedge transactions expected to be recognized in earnings.	$ (5)
Corn processed per month (in bushels) \| bu	72
Minimum [Member] \| Designated As Hedging Instrument [Member]
Derivative [Line Items]
Commodity sales volume hedged during historical hedging period (in gallons) \| gal	0
Contracted commodity sales volume hedged over future hedging period (in gallons) \| gal	1
Maximum [Member] \| Designated As Hedging Instrument [Member]
Derivative [Line Items]
Commodity sales volume hedged during historical hedging period (in gallons) \| gal	108
Contracted commodity sales volume hedged over future hedging period (in gallons) \| gal	28
Soybean [Member] \| Minimum [Member] \| Designated As Hedging Instrument [Member]
Derivative [Line Items]
Percentage of Anticipated Commodity Hedged During Historical Hedging Period	79.00%
Percentage of Anticipated Commodity Hedged over Future Hedging Period	0.00%
Soybean [Member] \| Maximum [Member] \| Designated As Hedging Instrument [Member]
Derivative [Line Items]
Percentage of Anticipated Commodity Hedged During Historical Hedging Period	100.00%
Percentage of Anticipated Commodity Hedged over Future Hedging Period	100.00%
Fair Value Hedging [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount	$ 496
Fair Value Hedging [Member] \| Designated As Hedging Instrument [Member]
Derivative [Line Items]
Interest Rate Derivative Assets, at Fair Value	3
Interest Rate Derivative Liabilities, at Fair Value		$ 4
Currency Swap [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount	$ 1,200
Corn [Member] \| Minimum [Member] \| Designated As Hedging Instrument [Member]
Derivative [Line Items]
Percentage of Anticipated Commodity Hedged During Historical Hedging Period	19.00%
Percentage of Anticipated Commodity Hedged over Future Hedging Period	4.00%
Corn [Member] \| Maximum [Member] \| Designated As Hedging Instrument [Member]
Derivative [Line Items]
Percentage of Anticipated Commodity Hedged During Historical Hedging Period	60.00%
Percentage of Anticipated Commodity Hedged over Future Hedging Period	38.00%

The entity's contracted commodity sales volumes hedged during the historical hedging period, in gallons.

No definition available.

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- Definition

The contracted sales volume hedged by the company over the future hedging period, in gallons.

+ References

No definition available.

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- Definition

This element represents the quantity of corn processing per month under the designated cash flow hedge program.

+ References

No definition available.

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- Definition

Amount, after tax, of cumulative translation adjustment attributable to gain (loss) on foreign currency that are designated as, and are effective as, economic hedges of a net investment in a foreign entity.

+ References

No definition available.

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- Definition

Percentage of anticipated production hedged during the historical hedging period

+ References

No definition available.

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- Definition

Percentage of anticipated production hedged over the forward hedging period.

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No definition available.

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- Definition

Amount of unrealized gain (loss) after tax related to the increase (decrease) in fair value of price risk derivatives designated as cash flow hedging instruments, which was recorded in accumulated other comprehensive income.

+ References

No definition available.

+ Details

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- Definition

Amount of unrealized gain (loss) related to the increase or decrease in fair value of interest rate derivatives designated as cash flow hedging instruments, which was recorded in AOCI to the extent that the cash flow hedge was determined to be effective.

+ References

No definition available.

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- Definition

Nominal or face amount used to calculate payments on the derivative liability.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (b)
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets.

+ References

No definition available.

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- Definition

Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.

+ References

No definition available.

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- Definition

Nominal or face amount used to calculate payments on a nonderivative instrument.

+ References

No definition available.

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- Definition

The estimated net amount of unrealized gains or losses on price risk cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=112277219&loc=d3e80748-113994

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- Definition

Amount, after tax, of cumulative translation adjustment attributable to gain (loss) on foreign currency derivatives that are designated as, and are effective as, economic hedges of a net investment in a foreign entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section 45
-Paragraph 20
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900

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