XML 57 R47.htm IDEA: XBRL DOCUMENT
v3.20.2

Goodwill and Other Intangible Assets, Net - Reallocation of Goodwill (Details) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2020 USD ($)
Goodwill [Line Items] |
Reallocation of goodwill | $ (15,283)
Cosmetic Actives |
Goodwill [Line Items] |
Reallocation of goodwill | 85,235
NPS |
Goodwill [Line Items] |
Reallocation of goodwill | (57,102)
F&F |
Goodwill [Line Items] |
Reallocation of goodwill | (25,256)
Taste |
Goodwill [Line Items] |
Reallocation of goodwill | $ (2,877)

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

X
- Definition Amount of increase (decrease) of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillPeriodIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ReportingUnitAxis=iff_CosmeticActivesIngredientsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ReportingUnitAxis=iff_NPSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ReportingUnitAxis=iff_FFMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ReportingUnitAxis=iff_TasteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |