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Goodwill and Other Intangible Assets, Net Goodwill and Other Intangible Assets, Net - Narrative (Details)	Nov. 30, 2020
Natural Product Solutions
Goodwill [Line Items]
Reporting unit in excess of carrying amount	10.00%
Reporting unit, percentage of existing headroom	1.00%
Savory
Goodwill [Line Items]
Reporting unit in excess of carrying amount	10.00%
Reporting unit, percentage of existing headroom	5.00%
Minimum [Member] | FSI and Inclusions
Goodwill [Line Items]
Reporting unit in excess of carrying amount	35.00%
Maximum [Member] | FSI and Inclusions
Goodwill [Line Items]
Reporting unit in excess of carrying amount	105.00%

X

- Definition

Reporting Unit, Percentage Of Existing Headroom

+ References

No definition available.

+ Details

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Namespace Prefix:	iff_
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Balance Type:	na
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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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X

- Definition

Percentage of fair value of reporting unit in excess of carrying amount.

+ References

No definition available.

+ Details

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X

- Details

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Namespace Prefix:
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X

- Details

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Period Type:

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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