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Income Taxes - Tax credit carryforward valuation allowance (Details) - USD ($) $ in Millions	12 Months Ended
	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

X

- 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

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Namespace Prefix:	ingr_
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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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Namespace Prefix:	ingr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

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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Namespace Prefix:	us-gaap_
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X

- 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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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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- Details

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X

- Details

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Period Type: