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Equity - Statements of Redeemable Equity (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Share-based Payments Subject to Redemption |  |  |  |  |  |  |  |
Beginning Balance | $ 25 | $ 21 | $ 37 | $ 31 | $ 27 | $ 36 | $ 37 | $ 36
Share-based compensation, net of issuance | 3 | 4 | (16) | 1 | 4 | (9) | (9) | (4)
Ending Balance | $ 28 | $ 25 | $ 21 | $ 32 | $ 31 | $ 27 | $ 28 | $ 32

X
- Definition Increase (decrease) in temporary equity for share-based compensation, net of issuance during the period. + References No definition available. + Details
Name: | ingr_TemporaryEquityShareBasedCompensationNetOfIssuance
Namespace Prefix: | ingr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_IncreaseDecreaseInTemporaryEquityRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Carrying amount, attributable to parent, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer. + References No definition available. + Details
Name: | us-gaap_TemporaryEquityCarryingAmountAttributableToParent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant