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

No definition available.

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Namespace Prefix:	adm_
Data Type:	num:volumeItemType
Balance Type:	na
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

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Namespace Prefix:	adm_
Data Type:	num:volumeItemType
Balance Type:	na
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

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Namespace Prefix:	adm_
Data Type:	num:volumeItemType
Balance Type:	na
Period Type:	instant

- 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.

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Percentage of anticipated production hedged during the historical hedging period

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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Period Type:	instant

- Definition

Percentage of anticipated production hedged over the forward hedging period.

+ References

No definition available.

+ Details

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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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Period Type:	instant

- 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.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
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-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
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-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- 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
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- 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.

+ Details

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Period Type:	duration

- Definition

Amount of gain (loss) from the increase (decrease) in fair value of foreign currency derivatives and nonderivative instruments designated as fair value hedging instruments which were recognized in earnings, net of offsets by the gain (loss) on the hedged item to the extent that the fair value hedge was determined to be effective.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (a)
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum period the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ 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 (d)
-URI http://asc.fasb.org/extlink&oid=121549185&loc=d3e80748-113994

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- 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=121549185&loc=d3e80748-113994

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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://www.xbrl.org/2009/role/commonPracticeRef
-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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=adm_SoybeanMember
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Balance Type:
Period Type:

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Period Type:

- Details

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Period Type:

- Details

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Data Type:	na
Balance Type:
Period Type:

- Details

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Derivative Instruments and Hedging Activities (Narrative) (Details) gal in Millions, bu in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) gal bu	Dec. 31, 2019 USD ($)	Mar. 31, 2020 bu
Derivative [Line Items]
Derivatives used in Net Investment Hedge, Net of Tax	$ (202)	$ 6
Unrealized gain (loss) on interest rate cash flow hedges, after-tax, AOCI	31	(43)
Notional Amount of Nonderivative Instruments	1,500	1,700
Foreign Debt used in Net Investment Hedge, Net of Tax	87	(7)
Gain (Loss) on Foreign Currency Fair Value Hedge Derivatives	8
Designated As Hedging Instrument [Member]
Derivative [Line Items]
Interest Rate Derivative Assets, at Fair Value	61	3
Interest Rate Derivative Liabilities, at Fair Value	15	43
After-tax gain (losses) in AOCI from commodity cash flow hedge transactions	119	(5)
After-tax gain (losses) in AOCI from commodity cash flow hedge transactions expected to be recognized in earnings.	$ 119
Corn processed per month (in bushels) \| bu	56		72
Soybean [Member] \| Minimum [Member] \| Designated As Hedging Instrument [Member]
Derivative [Line Items]
Percentage of Anticipated Commodity Hedged During Historical Hedging Period	27.00%
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
Currency Swap [Member] \| Net Investment Hedging [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount	$ 1,300	1,200
Corn [Member] \| Designated As Hedging Instrument [Member]
Derivative [Line Items]
Maximum Length of Time Hedged in Price Risk Cash Flow Hedge	12 months
Corn [Member] \| Minimum [Member] \| Designated As Hedging Instrument [Member]
Derivative [Line Items]
Percentage of Anticipated Commodity Hedged During Historical Hedging Period	20.00%
Percentage of Anticipated Commodity Hedged over Future Hedging Period	20.00%
Corn [Member] \| Maximum [Member] \| Designated As Hedging Instrument [Member]
Derivative [Line Items]
Percentage of Anticipated Commodity Hedged During Historical Hedging Period	38.00%
Percentage of Anticipated Commodity Hedged over Future Hedging Period	33.00%
Foreign Exchange Forward [Member] \| Net Investment Hedging [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount	$ 1,800
Interest Rate Swap [Member] \| Cash Flow Hedging [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount	3,300	$ 4,700
Derivative Asset, Notional Amount	$ 550
Ethanol [Member] \| Designated As Hedging Instrument [Member]
Derivative [Line Items]
Contracted commodity sales volume hedged over future hedging period (in gallons) \| gal	0
Ethanol [Member] \| Minimum [Member] \| Designated As Hedging Instrument [Member]
Derivative [Line Items]
Commodity sales volume hedged during historical hedging period (in gallons) \| gal	0
Ethanol [Member] \| Maximum [Member] \| Designated As Hedging Instrument [Member]
Derivative [Line Items]
Commodity sales volume hedged during historical hedging period (in gallons) \| gal	28