The gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that of income tax was recognized in other comprehensive income during the current period.

No definition available.

+ Details

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Namespace Prefix:	iri_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

Amount, after tax, of accumulated gain (loss) on derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e637-108580

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- Definition

Amount of hedged item in hedging relationship. Excludes hedged asset or liability.

+ References

No definition available.

+ Details

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- 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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Hedging Activities, Derivative Instruments and Fair Value Measurements - Investment in Consolidated Subsidiaries with Functional Currencies Other than USD (Details) € in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2021 EUR (€)	Mar. 31, 2021 USD ($)	Feb. 28, 2020 EUR (€)	Aug. 17, 2017 EUR (€)
Derivatives, Fair Value [Line Items]
Amount of hedged item \| €						€ 615.0
Interest Rate Swaps
Derivatives, Fair Value [Line Items]
Gain, net of income tax, recorded through other comprehensive income \| $	$ 18.9	$ 8.2
Balance included in accumulated other comprehensive (loss) income \| $		$ 83.0		$ 49.7
Euro Term Loan
Derivatives, Fair Value [Line Items]
Amount of hedged item \| €			€ 595.1		€ 601.2