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Summary of Significant Accounting Policies - Revenue - Estimated Amortization Expense for Contract Fulfillment Costs (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Accounting Policies [Abstract]
2023	$ 51,785
2024	33,731
2025	$ 14,893

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- Definition

Capitalized Contract Cost, Amortization Expense, Next Twelve Months

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No definition available.

+ Details

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- Definition

Capitalized Contract Cost, Amortization Expense, Year Three

+ References

No definition available.

+ Details

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Namespace Prefix:	irm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Capitalized Contract Cost, Amortization Expense, Year Two

+ References

No definition available.

+ Details

Name:	irm_CapitalizedContractCostAmortizationExpenseYearTwo
Namespace Prefix:	irm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- References

No definition available.

+ Details

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