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Income Taxes - Tax credit carryforward valuation allowance (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Tax credit carryforward valuation allowance |  |
Valuation allowance on foreign subsidiaries net deferred tax assets | $ 2 | $ 1
Increase in foreign net operating loss carryforwards | 19 |
State |  |
Tax credit carryforward valuation allowance |  |
Loss carryforwards, valuation allowance | 12 | 9
Credit carryforwards, valuation allowance | 4 | 4
Tax carryforwards, subject to limitations | 1 | 1
Foreign |  |
Tax credit carryforward valuation allowance |  |
Loss carryforwards, valuation allowance | 6 | 13
Credit carryforwards, valuation allowance | $ 5 | $ 1

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- Definition Amount of foreign subsidiaries deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References No definition available. + Details
Name: | ingr_DeferredTaxAssetsValuationAllowanceOnForeignSubsidiaries
Namespace Prefix: | ingr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of increase (decrease) in foreign net operating loss carryforwards excluding the unrecognized tax benefit. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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X
- Definition Amount of valuation allowance pertaining to the deferred tax asset for subjects to the section of 163 limitations. + References No definition available. + Details
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Namespace Prefix: | ingr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + 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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X
- Definition Amount of valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from tax credit carryforwards for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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X
- Details
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X
- Details
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