XML 109 R51.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Nature of Operations and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 29, 2018 | Dec. 31, 2016
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Receivables (included in Trade receivables) | $ 884,428 | $ 946,938 |  |  |
Operating Lease, Right-of-Use Asset | 287,870 | $ 0 |  | $ 308,300 |
Operating Lease, Liability | $ 291,111 |  |  | 313,300 |
Cumulative adjustment relating to the adoption of ASC 2016-16 |  |  |  |  | $ (33,719)
Minimum percentage chance of tax benefit realization in final settlement | 50.00% |  |  |  |
Prior service costs from plan improvements amortization period, minimum, years | 10 years |  |  |  |
Prior service costs from plan improvements amortization period, maximum, years | 20 years |  |  |  |
Amortization period of internal and external development costs, years | 7 years |  |  |  |
Difference amount between basic and diluted net income per share (in dollars per share) | $ 0.01 | $ 0.01 | $ 0 |  |
Inventories | $ 1,123,068 | $ 1,078,537 |  |  |
Machinery and equipment [Member] |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated useful life of property, plant and equipment, years | 20 years |  |  |  |
Minimum [Member] | Customer Relationships [Member] |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Other intangible assets amortized period, years | 11 years |  |  |  |
Minimum [Member] | Patents [Member] |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Other intangible assets amortized period, years | 11 years |  |  |  |
Minimum [Member] | Trade Names [Member] |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Other intangible assets amortized period, years | 14 years |  |  |  |
Minimum [Member] | Technological Know-how [Member] |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Other intangible assets amortized period, years | 5 years |  |  |  |
Minimum [Member] | Buildings And Improvements [Member] |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated useful life of property, plant and equipment, years | 10 years |  |  |  |
Minimum [Member] | Machinery and equipment [Member] |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated useful life of property, plant and equipment, years | 3 years |  |  |  |
Minimum [Member] | Information Technology Hardware And Software [Member] |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated useful life of property, plant and equipment, years | 3 years |  |  |  |
Maximum [Member] | Customer Relationships [Member] |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Other intangible assets amortized period, years | 23 years |  |  |  |
Maximum [Member] | Patents [Member] |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Other intangible assets amortized period, years | 15 years |  |  |  |
Maximum [Member] | Trade Names [Member] |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Other intangible assets amortized period, years | 28 years |  |  |  |
Maximum [Member] | Technological Know-how [Member] |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Other intangible assets amortized period, years | 28 years |  |  |  |
Maximum [Member] | Buildings And Improvements [Member] |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated useful life of property, plant and equipment, years | 40 years |  |  |  |
Maximum [Member] | Information Technology Hardware And Software [Member] |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Estimated useful life of property, plant and equipment, years | 7 years |  |  |  |
Accounting Standards Update 2016-02 [Member] |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Cumulative adjustment relating to the adoption of ASC 2016-16 |  | 23,094 |  |  |
Accounting Standards Update 2017-12 [Member] |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Cumulative adjustment relating to the adoption of ASC 2016-16 |  | 0 |  |  |
Retained earnings [Member] | Accounting Standards Update 2016-02 [Member] |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Cumulative adjustment relating to the adoption of ASC 2016-16 |  | 23,094 |  | $ 23,100 |
Retained earnings [Member] | Accounting Standards Update 2017-12 [Member] |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Cumulative adjustment relating to the adoption of ASC 2016-16 |  | (981) |  |  |
Trade Accounts Receivable With Factoring Agreements [Member] |  |  |  |  |
Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Trade Receivables Held-for-sale, Amount | $ 100,000 |  |  |  |
Receivables (included in Trade receivables) | 205,700 | 168,300 | $ 160,100 |  |
Proceeds From Sale Of Accounts Receivable | 37,700 | 13,600 | 15,000 |  |
Payments To Participate In Factoring Receivable Program | $ 7,100 | $ 3,400 | $ 3,000 |  |

X
- Definition Amortization period of internal and external development costs. + References No definition available. + Details
Name: | iff_AmortizationPeriodOfInternalAndExternalDevelopmentCosts
Namespace Prefix: | iff_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Difference amount between basic and diluted net income per share. + References No definition available. + Details
Name: | iff_DifferenceAmountBetweenBasicAndDilutedNetIncomePerShare
Namespace Prefix: | iff_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum percentage likelihood of tax benefit to be realized upon final settlement + References No definition available. + Details
Name: | iff_MinimumPercentageLikelihoodOfTaxBenefitToBeRealizedUponFinalSettlement
Namespace Prefix: | iff_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Organization And Summary Of Significant Accounting Policies [Line Items] + References No definition available. + Details
Name: | iff_OrganizationAndSummaryOfSignificantAccountingPoliciesLineItems
Namespace Prefix: | iff_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Payments To Participate In Factoring Receivable Program + References No definition available. + Details
Name: | iff_PaymentsToParticipateInFactoringReceivableProgram
Namespace Prefix: | iff_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Prior service costs from plan improvements amortization period maximum. + References No definition available. + Details
Name: | iff_PriorServiceCostsFromPlanImprovementsAmortizationPeriodMaximum
Namespace Prefix: | iff_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Prior service costs from plan improvements amortization period minimum. + References No definition available. + Details
Name: | iff_PriorServiceCostsFromPlanImprovementsAmortizationPeriodMinimum
Namespace Prefix: | iff_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Proceeds From Sale Of Accounts Receivable + References No definition available. + Details
Name: | iff_ProceedsFromSaleOfAccountsReceivable
Namespace Prefix: | iff_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(5)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 + Details
Name: | us-gaap_AccountsReceivableNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption. + References No definition available. + Details
Name: | us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118951113&loc=d3e6676-107765 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116846819&loc=d3e3927-108312 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_InventoryNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
Name: | us-gaap_OperatingLeaseLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
Name: | us-gaap_OperatingLeaseRightOfUseAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The face amount of accounts receivable that will be sold to other entities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522 + Details
Name: | us-gaap_TradeReceivablesHeldForSaleAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_MachineryAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_PatentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TradeNamesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_IntellectualPropertyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=iff_BuildingsAndImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=iff_InformationTechnologyHardwareAndSoftwareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201602Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201712Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_RetainedEarningsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=iff_TradeAccountsReceivableWithFactoringAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |