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Other (Income) Expense (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Other Income and Expenses [Abstract] |  |  |  |
Other - net | $ (3) | $ 2 | $ (35) | $ 9
Gain (Loss) on Sale and Revaluation of Assets | 64 | 15 | 64 | 30
Other (Income) Expense - Net | (67) | (13) | (99) | (21)
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component | $ (8) | $ (6) | $ (21) | $ (8)

X
- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets, equity in securities of subsidiaries or equity method investee. This element also includes the amount of gain (loss) on dilutions of equity and the revaluation of previously held equity investments. + References No definition available. + Details
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Namespace Prefix: | adm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Unclassified nonoperating income and (expense) items presented as Other - net. + References No definition available. + Details
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Namespace Prefix: | adm_
Data Type: | xbrli:monetaryItemType
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X
- Definition Amount of expense (reversal of expense) for net periodic benefit cost components, excluding service cost component, of defined benefit plan. Amount includes, but is not limited to, interest cost, expected (return) loss on plan asset, amortization of prior service cost (credit), amortization of (gain) loss, amortization of transition (asset) obligation, settlement (gain) loss, curtailment (gain) loss and certain termination benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109237824&loc=SL108413299-114919 + Details
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X
- References No definition available. + Details
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X
- Definition Amount of income (expense) related to nonoperating activities, classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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