Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483444/210-20-55-22

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483466/210-20-50-3

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483444/210-20-55-7

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (a),(c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-4B

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 4D
-Subparagraph (c)(2)
-SubTopic 20
-Topic 860
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481326/860-20-50-4D

+ Details

Name:	us-gaap_DerivativeFairValueOfDerivativeAsset
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

+ Details

Name:	us-gaap_DerivativeFairValueOfDerivativeLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-1B

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-1A

+ Details

Name:	us-gaap_DerivativeNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

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

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_OtherCurrentAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_OtherAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_AccruedLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_OtherLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateCapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CrossCurrencyInterestRateContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_NetInvestmentHedgingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeForwardMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_FairValueHedgingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=iri_ForeignCurrencyForwardTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Hedging Activities and Derivative Instruments - Balance Sheets (Details)	Sep. 30, 2023 USD ($)	Sep. 30, 2023 EUR (€)	Jun. 29, 2023 USD ($)	Dec. 31, 2022 USD ($)
Interest rate swap contracts \| Cash flow \| Derivatives Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Notional amount of derivative	$ 528,500,000			$ 528,500,000
Interest rate swap contracts \| Cash flow \| Derivatives Designated as Hedging Instruments \| Fair Value Other Current Assets
Derivatives, Fair Value [Line Items]
Assets fair value	11,500,000			8,800,000
Interest rate swap contracts \| Cash flow \| Derivatives Designated as Hedging Instruments \| Fair Value Other Assets
Derivatives, Fair Value [Line Items]
Assets fair value	5,400,000			5,300,000
Interest rate swap contracts \| Cash flow \| Derivatives Designated as Hedging Instruments \| Fair Value Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liabilities fair value	0			0
Interest rate swap contracts \| Cash flow \| Derivatives Designated as Hedging Instruments \| Fair Value Other Liabilities
Derivatives, Fair Value [Line Items]
Liabilities fair value	0			0
Interest rate cap contracts \| Cash flow \| Derivatives Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Notional amount of derivative				1,000,000,000
Interest rate cap contracts \| Cash flow \| Derivatives Designated as Hedging Instruments \| Fair Value Other Current Assets
Derivatives, Fair Value [Line Items]
Assets fair value				8,300,000
Interest rate cap contracts \| Cash flow \| Derivatives Designated as Hedging Instruments \| Fair Value Other Assets
Derivatives, Fair Value [Line Items]
Assets fair value				9,800,000
Interest rate cap contracts \| Cash flow \| Derivatives Designated as Hedging Instruments \| Fair Value Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liabilities fair value				0
Interest rate cap contracts \| Cash flow \| Derivatives Designated as Hedging Instruments \| Fair Value Other Liabilities
Derivatives, Fair Value [Line Items]
Liabilities fair value				0
Cross-currency interest rate swap contracts \| Net investment \| Derivatives Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Notional amount of derivative	1,054,200,000	€ 500,000,000	$ 528,500,000	1,054,200,000
Cross-currency interest rate swap contracts \| Net investment \| Derivatives Designated as Hedging Instruments \| Fair Value Other Current Assets
Derivatives, Fair Value [Line Items]
Assets fair value	16,700,000			17,700,000
Cross-currency interest rate swap contracts \| Net investment \| Derivatives Designated as Hedging Instruments \| Fair Value Other Assets
Derivatives, Fair Value [Line Items]
Assets fair value	0			0
Cross-currency interest rate swap contracts \| Net investment \| Derivatives Designated as Hedging Instruments \| Fair Value Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liabilities fair value	0			0
Cross-currency interest rate swap contracts \| Net investment \| Derivatives Designated as Hedging Instruments \| Fair Value Other Liabilities
Derivatives, Fair Value [Line Items]
Liabilities fair value	19,500,000			28,700,000
Foreign currency forwards \| Fair value \| Derivatives Not Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Notional amount of derivative	7,300,000			7,300,000
Foreign currency forwards \| Fair value \| Derivatives Not Designated as Hedging Instruments \| Fair Value Other Current Assets
Derivatives, Fair Value [Line Items]
Assets fair value	0			0
Foreign currency forwards \| Fair value \| Derivatives Not Designated as Hedging Instruments \| Fair Value Other Assets
Derivatives, Fair Value [Line Items]
Assets fair value	0			0
Foreign currency forwards \| Fair value \| Derivatives Not Designated as Hedging Instruments \| Fair Value Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liabilities fair value	0			0
Foreign currency forwards \| Fair value \| Derivatives Not Designated as Hedging Instruments \| Fair Value Other Liabilities
Derivatives, Fair Value [Line Items]
Liabilities fair value	$ 0			0
Foreign currency forwards \| Fair value \| Derivatives Not Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Notional amount of derivative				15,800,000
Foreign currency forwards \| Fair value \| Derivatives Not Designated as Hedging Instruments \| Fair Value Other Current Assets
Derivatives, Fair Value [Line Items]
Assets fair value				0
Foreign currency forwards \| Fair value \| Derivatives Not Designated as Hedging Instruments \| Fair Value Other Assets
Derivatives, Fair Value [Line Items]
Assets fair value				0
Foreign currency forwards \| Fair value \| Derivatives Not Designated as Hedging Instruments \| Fair Value Accrued Liabilities
Derivatives, Fair Value [Line Items]
Liabilities fair value				0
Foreign currency forwards \| Fair value \| Derivatives Not Designated as Hedging Instruments \| Fair Value Other Liabilities
Derivatives, Fair Value [Line Items]
Liabilities fair value				$ 0