XML 80 R68.htm IDEA: XBRL DOCUMENT
v3.22.4

Tangible Equity Units (Allocation of TEU) (Details) $ in Millions | Sep. 17, 2018 USD ($)
--- | ---
Tangible Equity Units [Line Items] |
Net Proceeds | $ 800

X
- Definition [Line Items] for Tangible Equity Units [Table] + References No definition available. + Details
Name: | iff_TangibleEquityUnitsLineItems
Namespace Prefix: | iff_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tangible Equity Units Proceeds + References No definition available. + Details
Name: | iff_TangibleEquityUnitsProceeds
Namespace Prefix: | iff_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration