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Financing Arrangements - Maturities (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Long-term debt maturities |  |
Long-term debt maturing in 2026 | $ 500 |
Long-term debt maturing in 2030 | 600 |
Long-term debt maturing in 2037 | 250 |
Long-term debt maturing in 2050 | 400 |
Guaranteed obligations of consolidated subsidiaries | $ 58 | $ 57

X
- Definition Represents the aggregate principal amount of subsidiary debt obligations which are guaranteed by the entity. + References No definition available. + Details
Name: | ingr_DebtInstrumentPrincipalAmountOfSubsidiaryDebtGuaranteed
Namespace Prefix: | ingr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in 2026. + References No definition available. + Details
Name: | ingr_LongTermDebtMaturityYear2026
Namespace Prefix: | ingr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in 2030. + References No definition available. + Details
Name: | ingr_LongTermDebtMaturityYear2030
Namespace Prefix: | ingr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in 2037. + References No definition available. + Details
Name: | ingr_LongTermDebtMaturityYear2037
Namespace Prefix: | ingr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in 2050. + References No definition available. + Details
Name: | ingr_LongTermDebtMaturityYear2050
Namespace Prefix: | ingr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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