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Income Taxes (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Income Tax Contingency [Line Items] |  |  |  |
Effective income tax rate | 18.40% | 13.70% | 17.40% | 14.80%
Argentine Tax Authorities [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Income tax assessment | $ 7 |  | $ 7 |
Income tax assessment - Interest and Penalties | 33 |  | 33 |
Estimated Additional Tax Assessment | 92 |  | 92 |
Additional income tax assessment - Interest and Penalties | 43 |  | 43 |
Tax and Customs Administration, Netherlands [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Income tax assessment | 81 |  | 81 |
Additional income tax assessment - Interest and Penalties | $ 29 |  | $ 29 |

X
- Definition This element represents the amount of interest and penalties on additional income tax assessment that could be received in all tax years for which an audit has not yet been initiated and are still open for assessment. + References No definition available. + Details
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Namespace Prefix: | adm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The element represents the amount of additional income tax assessment that could be received in all tax years for which an audit has not yet been initiated and are still open for assessment. + References No definition available. + Details
Name: | adm_EstimatedAdditionalTaxAssessmentTax
Namespace Prefix: | adm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of penalties and interest on income tax assessed by a taxing authority. + References No definition available. + Details
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Namespace Prefix: | adm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of income tax assessed by a taxing authority. + References No definition available. + Details
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Namespace Prefix: | adm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 + Details
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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. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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- Details
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Namespace Prefix: |
Data Type: | na
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- Details
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