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v3.19.3.a.u2

Income Taxes - Valuation allowance (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Income Taxes |  |  |
Increase in valuation allowance of foreign subsidiary net deferred tax assets | $ 2 | $ 6 | $ 16
Percentage increase in valuation allowance of foreign subsidiary net deferred tax assets | 0.3 | 1.0 | 2.0

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- Definition The amount of increase in the valuation allowance on the net deferred tax assets of a foreign subsidiary. + References No definition available. + Details
Name: | ingr_IncreaseInValuationAllowanceOnNetDeferredTaxAssetsOfForeignSubsidiary
Namespace Prefix: | ingr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The percentage increase in the valuation allowance on the net deferred tax assets of a foreign subsidiary. + References No definition available. + Details
Name: | ingr_IncreaseInValuationAllowanceOnNetDeferredTaxAssetsOfForeignSubsidiaryPercent
Namespace Prefix: | ingr_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration