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Supplementary Information - Additional Quarterly Financial Data (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019
Supplementary Information
Restructuring charges, after tax	$ 40	$ 15	$ 8	$ 11	$ 12	$ 22	$ 7	$ 3
Income (charges) for other matters, after tax	27				13
Income (charges) for other tax matters, after tax	3	(6)				$ (2)
Acquisition/integration costs, after tax	4	4	$ 2		$ 1			$ 1
Extinguishment of debt, after tax		4
Fair value markup of acquired inventory, after tax	1	3
Storm damage cost, after tax	$ 1	$ 2

X

- Definition

The amount after tax of acquisition or integration related costs incurred during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	ingr_
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Balance Type:	debit
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X

- Definition

Represents the after tax charge for fair value markup of acquired inventory during the period.

+ References

No definition available.

+ Details

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X

- Definition

The amount of other income net of tax related to other matters incurred during period.

+ References

No definition available.

+ Details

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Namespace Prefix:	ingr_
Data Type:	xbrli:monetaryItemType
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X

- Definition

The amount of other tax matters income (chargers) incurred during period.

+ References

No definition available.

+ Details

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X

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan, net of tax.

+ References

No definition available.

+ Details

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Namespace Prefix:	ingr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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X

- Definition

Represents the after tax storm damage cost incurred during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	ingr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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X

- References

No definition available.

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X

- Definition

The difference between the reacquisition price and the net carrying amount of the extinguished debt recognized currently as a component of income in the period of extinguishment, net of tax.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629

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