Cash Pool Agreement, Cash Position, Gross

No definition available.

Name:	irm_CashPoolAgreementCashPositionGross
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Balance Type:	debit
Period Type:	instant

- Definition

Cash Pool Agreement, Cash Position, Net

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

Cash Pool Agreement, Outstanding Borrowings

+ References

No definition available.

+ Details

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

- References

No definition available.

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- Definition

The bond leverage ratio, per the indentures, at the end of the reporting period.

+ References

No definition available.

+ Details

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- Definition

Revolving credit and term leverage ratio at the end of the reporting period.

+ References

No definition available.

+ Details

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- Definition

Represents the entity's revolving credit and term loan fixed charge coverage ratio at the end of the reporting period.

+ References

No definition available.

+ Details

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- Definition

Represents the entity's revolving credit and term loan, net secured debt lease adjusted leverage ratio at the end of the reporting period.

+ References

No definition available.

+ Details

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- Definition

Represents the period of earnings before interest, taxes, depreciation, amortization and rent expense (EBITDAR) for calculation of remaining borrowing capacity under the credit facility.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Represents the option available for the Company to request additional commitments.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

The entity's percentage ownership in its U.S. subsidiaries, whereby the subsidiary is then considered a guarantor, on a senior subordinated basis, of the Parent Notes.

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Par, Percentage

+ References

No definition available.

+ Details

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- Definition

The percentage of capital stock or other equity interests of the first tier foreign subsidiaries of the entity that are pledged to secure certain debt instruments.

+ References

No definition available.

+ Details

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- Definition

Represents the amount of payments due as a percentage of the original principal amount.

+ References

No definition available.

+ Details

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- Definition

Dividends Limit, Leverage Ratio Trigger

+ References

No definition available.

+ Details

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- Definition

Dividends Limit, Percent

+ References

No definition available.

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- Definition

Number of banks supporting New Credit Agreement

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
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Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 30
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Balance Type:	credit
Period Type:	instant

- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Balance Type:	credit
Period Type:	instant

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

+ 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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- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of the fee for available but unused credit capacity under the credit facility.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Amount of long-term debt and capital leases due within one year or the normal operating cycle, if longer.

+ References

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Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle, if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
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Period Type:	duration

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Name:	us-gaap_CreditFacilityAxis=us-gaap_SecuredDebtMember
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Debt (Details) € in Thousands, CAD in Thousands, AUD in Thousands				3 Months Ended					9 Months Ended
	Sep. 28, 2016 AUD	Jul. 02, 2015 USD ($) bank	Mar. 06, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2016 AUD	Sep. 30, 2016 CAD	Jun. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 AUD	Sep. 30, 2016 CAD	Sep. 30, 2016 EUR (€)	Sep. 15, 2016 CAD	Jun. 24, 2016 USD ($)	May 31, 2016 USD ($)	Apr. 19, 2016 USD ($)	Dec. 31, 2015 USD ($)
Debt
Capital stock of subsidiaries pledged to secure debt (as a percent)				66.00%					66.00%		66.00%	66.00%	66.00%
Ownership in U.S. subsidiaries that are considered guarantor (as a percent)				100.00%					100.00%		100.00%	100.00%	100.00%
Number of banks supporting New Credit Agreement \| bank		25
Current portion of long-term debt				$ 121,203,000					$ 121,203,000									$ 88,068,000
Debt extinguishment expense				0			$ 9,283,000	$ 2,156,000	$ 9,283,000	$ 2,156,000
Debt covenants
Dividends Limit, Percent									95.00%
Dividends Limit, Leverage Ratio Trigger									6.0
Long-term Debt, Gross				6,528,885,000					$ 6,528,885,000									$ 4,903,977,000
Net proceeds from sales of senior notes							$ 738,750,000		925,443,000	985,000,000
Cash pool agreement, net cash position				18,900,000					18,900,000
Cash pool agreement, gross cash position				50,700,000					50,700,000
Cash pool agreement, outstanding borrowings				$ 31,800,000					$ 31,800,000
New Credit Agreement
Debt
Maximum borrowing capacity															$ 2,000,000,000
Average interest rate (as a percent)				2.90%					2.90%		2.90%	2.90%	2.90%
New Credit Agreement \| Minimum
Debt
Commitment fee percentage									0.25%
New Credit Agreement \| Maximum
Debt
Commitment fee percentage									0.40%
Accounts Receivable Securitization Program \| Secured Debt
Debt
Maximum borrowing capacity			$ 250,000,000
Effective interest rate (as a percent)				1.40%					1.40%		1.40%	1.40%	1.40%
Commitment fee (as a percent)			0.40%
Accounts Receivable from Securitization				$ 208,800,000					$ 208,800,000
Credit Agreement
Debt
Capital stock of subsidiaries pledged to secure debt (as a percent)				66.00%					66.00%		66.00%	66.00%	66.00%
Debt covenants
Net total lease adjusted leverage ratio				5.7					5.7		5.7	5.7	5.7					5.6
Net secured debt lease adjusted leverage ratio				2.6					2.6		2.6	2.6	2.6					2.6
Bond leverage ratio, per indentures				5.4					5.4		5.4	5.4	5.4					5.5
Fixed charge coverage ratio				2.5					2.5		2.5	2.5	2.5					2.4
Credit Agreement \| Minimum
Debt covenants
Fixed charge coverage ratio				1.5					1.5		1.5	1.5	1.5
Credit Agreement \| Maximum
Debt covenants
Net total lease adjusted leverage ratio				6.5					6.5		6.5	6.5	6.5
Net secured debt lease adjusted leverage ratio				4.0					4.0		4.0	4.0	4.0
Bond leverage ratio, per indentures				6.5					6.5		6.5	6.5	6.5
Revolving Credit Facility
Debt
Letters of credit outstanding				$ 55,392,000					$ 55,392,000
Period of earnings before interest, taxes, depreciation, amortization and rent expense (EBITDAR) for calculation of remaining borrowing capacity									12 months
Remaining amount available for borrowing under credit facility				453,847,000					$ 453,847,000
Fair Value				1,240,761,000					1,240,761,000									$ 784,438,000
Commitment fees and letters of credit fees				428,000				$ 883,000	1,457,000	$ 2,741,000
Debt covenants
Long-term Debt, Gross				1,240,761,000					1,240,761,000									784,438,000
Revolving Credit Facility \| New Credit Agreement
Debt
Maximum borrowing capacity		$ 1,500,000,000													1,750,000,000
Optional additional commitments															250,000,000
Carrying amount on long-term debt				$ 1,240,761,000					$ 1,240,761,000
Average interest rate (as a percent)				2.90%					2.90%		2.90%	2.90%	2.90%
Revolving Credit Facility \| New Credit Agreement \| Minimum
Debt
Effective interest rate (as a percent)				2.30%					2.30%		2.30%	2.30%	2.30%
Revolving Credit Facility \| New Credit Agreement \| Maximum
Debt
Effective interest rate (as a percent)				4.80%					4.80%		4.80%	4.80%	4.80%
Term Loan Facility \| New Credit Agreement
Debt
Maximum borrowing capacity															$ 250,000,000
Amount of quarterly installments based on the original principal (as a percentage)		$ 3,125,000
Carrying amount on long-term debt				$ 234,375,000					$ 234,375,000
Average interest rate (as a percent)				2.80%					2.80%		2.80%	2.80%	2.80%
Fair Value				$ 234,375,000					$ 234,375,000									243,750,000
Debt covenants
Long-term Debt, Gross				234,375,000					234,375,000									$ 243,750,000
Term Loan Facility \| New Credit Agreement \| USD
Debt
Carrying amount on long-term debt				718,800,000					718,800,000
Term Loan Facility \| New Credit Agreement \| CAD
Debt
Carrying amount on long-term debt \| CAD												CAD 6,000
Term Loan Facility \| New Credit Agreement \| AUD
Debt
Carrying amount on long-term debt \| AUD											AUD 303,000
Term Loan Facility \| New Credit Agreement \| EUR
Debt
Carrying amount on long-term debt \| €													€ 255,150
Bridge Loan \| Unsecured Bridge Term Loan [Member]
Debt
Principal amount of notes																	$ 850,000,000
Senior Notes 4.375 Percent due 2021
Debt
Fair Value				515,000,000					515,000,000
Debt covenants
Long-term Debt, Gross				$ 500,000,000					$ 500,000,000							$ 500,000,000
Senior Notes 5.375 Percent due 2026
Debt
Ownership in U.S. subsidiaries that are considered guarantor (as a percent)				100.00%					100.00%		100.00%	100.00%	100.00%
Fair Value				$ 249,375,000					$ 249,375,000
Debt covenants
Long-term Debt, Gross				250,000,000					250,000,000							$ 250,000,000
CAD 5.375 Percent Senior Notes due 2023 [Member]
Debt
Fair Value				191,412,000					191,412,000
Debt covenants
Long-term Debt, Gross				190,223,000					$ 190,223,000					CAD 250,000
Net proceeds from sales of senior notes				$ 186,693,000		CAD 246,250
Australian Dollar Term Loan [Member]
Debt
Amount of quarterly installments based on the original principal (as a percentage) \| AUD	AUD 6,250
Effective interest rate (as a percent)				6.10%					6.10%		6.10%	6.10%	6.10%
Fair Value				$ 190,876,000					$ 190,876,000
Debt covenants
Long-term Debt, Gross	AUD 250,000			188,967,000					$ 188,967,000		AUD 250,000
Par percentage	99.00%
Net proceeds from sales of senior notes				$ 185,800,000	AUD 243,750
Australian Dollar Term Loan [Member] \| BBSY
Debt covenants
Basis spread on variable rate	4.30%