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

No definition available.

Name:	adm_CommodityHedgedDuringHistoricalHedgingPeriodingallons
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

Name:	adm_CommodityHedgedOverFutureHedgingPeriodingallons
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

Name:	adm_CornProcessedPerMonth
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

Name:	adm_ForeignDebtusedinNetInvestmentHedgeNetofTax
Namespace Prefix:	adm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage of anticipated production hedged during the historical hedging period

+ References

No definition available.

+ Details

Name:	adm_PercentageofAnticipatedProductionHedgedDuringHistoricalHedgingPeriod
Namespace Prefix:	adm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of anticipated production hedged over the forward hedging period.

+ References

No definition available.

+ Details

Name:	adm_PercentageofAnticipatedProductionHedgedoverFutureHedgingPeriod
Namespace Prefix:	adm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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

Name:	adm_UnrealizedGainLossOnPriceRiskCashFlowHedgesAfterTaxAccumulatedOtherComprehensiveIncome
Namespace Prefix:	adm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

Name:	adm_UnrealizedgainlossoninterestratecashflowhedgesaftertaxAOCI
Namespace Prefix:	adm_
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
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959

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=121590274&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 (b)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959

+ Details

Name:	us-gaap_DerivativeAssetNotionalAmount
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
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959

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=121590274&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=121590274&loc=SL5579245-113959

+ Details

Name:	us-gaap_DerivativeLiabilityNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
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

Name:	us-gaap_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of net gains or losses on interest rate cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income upon the hedged transaction affecting earnings.

+ 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 (c)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959

+ Details

Name:	us-gaap_InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet
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

Name:	us-gaap_InterestRateDerivativeAssetsAtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

+ Details

Name:	us-gaap_MaximumLengthOfTimeHedgedInPriceRiskCashFlowHedge1
Namespace Prefix:	us-gaap_
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

Name:	us-gaap_NotionalAmountOfNonderivativeInstruments
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

+ Details

Name:	us-gaap_PriceRiskCashFlowHedgeUnrealizedGainLossToBeReclassifiedDuringNext12Months
Namespace Prefix:	us-gaap_
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

+ Details

Name:	us-gaap_TranslationAdjustmentForNetInvestmentHedgeNetOfTax
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_IncomeStatementLocationAxis=us-gaap_SalesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_InterestExpenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=adm_CornMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=adm_EthanolMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=adm_SoybeanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_NetInvestmentHedgingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CurrencySwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeForwardMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Derivative Instruments and Hedging Activities (Narrative) (Details) bu in Millions, $ in Millions, € in Billions	3 Months Ended			12 Months Ended
	Mar. 31, 2021 USD ($) bu gal	Mar. 31, 2021 EUR (€)	Mar. 31, 2020 USD ($) bu	Dec. 31, 2020 EUR (€)	Dec. 31, 2020 USD ($)
Derivative [Line Items]
Unrealized gain (loss) on interest rate cash flow hedges, after-tax, AOCI	$ 97				$ 31
Corn processed per month (in bushels) \| bu	56		72
Notional Amount of Nonderivative Instruments \| €		€ 2.8		€ 1.5
Foreign Debt used in Net Investment Hedge, Net of Tax	$ 1				87
Designated As Hedging Instrument [Member]
Derivative [Line Items]
Unrealized Gain (Loss) on Price Risk Cash Flow Hedges, after Tax, Accumulated Other Comprehensive Income	140				119
Interest Rate Derivative Assets, at Fair Value	130				61
After-tax gains (losses) in AOCI from commodity cash flow hedge transactions	140
Designated As Hedging Instrument [Member] \| Revenues [Member]
Derivative [Line Items]
Interest contracts effective amount recognized in earnings	(14)		$ (25)
Designated As Hedging Instrument [Member] \| Interest Expense [Member]
Derivative [Line Items]
Interest contracts effective amount recognized in earnings	$ 0		$ 0
Corn [Member] \| Designated As Hedging Instrument [Member]
Derivative [Line Items]
Derivative Hedged Item Time Period	12 months	12 months
Corn [Member] \| Minimum [Member] \| Designated As Hedging Instrument [Member]
Derivative [Line Items]
Percentage of anticipated commodity purchases or production hedged during historical hedging period (as a percent)	21.00%
Percentage of anticipated commodity purchases or production hedged over future hedging period (as a percent)	1.00%
Corn [Member] \| Maximum [Member] \| Designated As Hedging Instrument [Member]
Derivative [Line Items]
Percentage of anticipated commodity purchases or production hedged during historical hedging period (as a percent)	38.00%
Percentage of anticipated commodity purchases or production hedged over future hedging period (as a percent)	33.00%
Ethanol [Member] \| Designated As Hedging Instrument [Member]
Derivative [Line Items]
Commodity hedged over future hedging period, (in gallons) \| gal	0
Ethanol [Member] \| Minimum [Member] \| Designated As Hedging Instrument [Member]
Derivative [Line Items]
Commodity hedged during historical hedging period, (in gallons) \| gal	0
Ethanol [Member] \| Maximum [Member] \| Designated As Hedging Instrument [Member]
Derivative [Line Items]
Commodity hedged during historical hedging period, (in gallons) \| gal	1,000,000
Soybean [Member] \| Designated As Hedging Instrument [Member]
Derivative [Line Items]
Derivative Hedged Item Time Period	12 months	12 months
Soybean [Member] \| Minimum [Member] \| Designated As Hedging Instrument [Member]
Derivative [Line Items]
Percentage of anticipated commodity purchases or production hedged during historical hedging period (as a percent)	27.00%
Percentage of anticipated commodity purchases or production hedged over future hedging period (as a percent)	0.00%
Soybean [Member] \| Maximum [Member] \| Designated As Hedging Instrument [Member]
Derivative [Line Items]
Percentage of anticipated commodity purchases or production hedged during historical hedging period (as a percent)	100.00%
Percentage of anticipated commodity purchases or production hedged over future hedging period (as a percent)	100.00%
Net Investment Hedging [Member]
Derivative [Line Items]
Derivatives used in Net Investment Hedge, Net of Tax	$ 116				202
Net Investment Hedging [Member] \| Currency Swap [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount					1,300
Net Investment Hedging [Member] \| Foreign Exchange Forward [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount					1,800
Cash Flow Hedging [Member] \| Interest Rate Swap [Member] \| Revenues [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	1,700				3,300
Cash Flow Hedging [Member] \| Interest Rate Swap [Member] \| Interest Expense [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	$ 550				$ 550