XML 68 R80.htm IDEA: XBRL DOCUMENT v2.4.1.9
SCHEDULE III - SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
facility
Dec. 31, 2013
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 255us-gaap_SECScheduleIIIRealEstateNumberOfUnits  
Encumbrances $ 4,824us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances  
Initial cost to Company 1,079,215irm_RealEstateAndAccumulatedDepreciationInitialCostTotal  
Cost capitalized subsequent to acquisition 940,370us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts  
Gross amount carried at close of current period (1) (2) 2,019,585us-gaap_RealEstateGrossAtCarryingValue 1,949,073us-gaap_RealEstateGrossAtCarryingValue
Accumulated depreciation at close of current period (1) (2) 648,734us-gaap_RealEstateAccumulatedDepreciation 592,329us-gaap_RealEstateAccumulatedDepreciation
Number of facilities leased 839irm_NumberOfFacilitiesLeased  
Number of sites exceeding 5% of aggregate gross amount of assets 0irm_NumberOfSitesExceeding5PercentOfGrossAmountOfAssets  
Aggregate gross amount of assets at close of period 5.00%irm_PercentOfAggregateGrossAmountOfAssets  
North America    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 177us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_StatementGeographicalAxis
= us-gaap_NorthAmericaMember
 
Initial cost to Company 835,804irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_StatementGeographicalAxis
= us-gaap_NorthAmericaMember
 
Cost capitalized subsequent to acquisition 750,555us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_StatementGeographicalAxis
= us-gaap_NorthAmericaMember
 
Gross amount carried at close of current period (1) (2) 1,586,359us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_StatementGeographicalAxis
= us-gaap_NorthAmericaMember
 
Accumulated depreciation at close of current period (1) (2) 531,769us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_StatementGeographicalAxis
= us-gaap_NorthAmericaMember
 
United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 162us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 767,030irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 672,245us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 1,439,275us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 486,109us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_StatementGeographicalAxis
= country_US
 
Canada    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 15us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Initial cost to Company 68,774irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Cost capitalized subsequent to acquisition 78,310us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Gross amount carried at close of current period (1) (2) 147,084us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Accumulated depreciation at close of current period (1) (2) 45,660us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 49us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Encumbrances 2,235us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 166,482irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 113,857us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 280,339us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 94,097us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Latin America    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 27us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Encumbrances 2,589us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Initial cost to Company 74,718irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Cost capitalized subsequent to acquisition 71,490us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Gross amount carried at close of current period (1) (2) 146,208us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Accumulated depreciation at close of current period (1) (2) 22,157us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Asia Pacific    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 2us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember
 
Initial cost to Company 2,211irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember
 
Cost capitalized subsequent to acquisition 4,468us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember
 
Gross amount carried at close of current period (1) (2) 6,679us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember
 
Accumulated depreciation at close of current period (1) (2) 711us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember
 
140 Oxmoor Ct, Birmingham, Alabama | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BirminghamAl140OxmoorCtMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,322irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BirminghamAl140OxmoorCtMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 800us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BirminghamAl140OxmoorCtMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 2,122us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BirminghamAl140OxmoorCtMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 737us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BirminghamAl140OxmoorCtMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
140 Oxmoor Ct, Birmingham, Alabama | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1420 North Fiesta Blvd, Gilbert, Arizona | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_GilbertAz1420NorthFiestaBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,637irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_GilbertAz1420NorthFiestaBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 2,539us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_GilbertAz1420NorthFiestaBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 4,176us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_GilbertAz1420NorthFiestaBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,082us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_GilbertAz1420NorthFiestaBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
1420 North Fiesta Blvd, Gilbert, Arizona | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
2955 S. 18th Place, Phoenix, Arizona | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PhoenixAz2955S.18thPlaceMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 12,178irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PhoenixAz2955S.18thPlaceMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 2,546us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PhoenixAz2955S.18thPlaceMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 14,724us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PhoenixAz2955S.18thPlaceMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,762us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PhoenixAz2955S.18thPlaceMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
2955 S. 18th Place, Phoenix, Arizona | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
4449 South 36th St, Phoenix, Arizona | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PhoenixAz4449South36thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 7,305irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PhoenixAz4449South36thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 514us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PhoenixAz4449South36thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 7,819us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PhoenixAz4449South36thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 3,774us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PhoenixAz4449South36thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
4449 South 36th St, Phoenix, Arizona | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
3381 East Global Loop, Tucson, Arizona | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TucsonAz3381EastGlobalLoopMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,622irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TucsonAz3381EastGlobalLoopMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 3,322us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TucsonAz3381EastGlobalLoopMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 4,944us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TucsonAz3381EastGlobalLoopMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,993us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TucsonAz3381EastGlobalLoopMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
3381 East Global Loop, Tucson, Arizona | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
200 Madrone Way, Felton, California | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FeltonCa200MadroneWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 760irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FeltonCa200MadroneWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 633us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FeltonCa200MadroneWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 1,393us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FeltonCa200MadroneWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 471us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FeltonCa200MadroneWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
200 Madrone Way, Felton, California | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
13379 Jurupa Ave, Fontana, California | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FontanaCa13379JurupaAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 10,472irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FontanaCa13379JurupaAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 7,200us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FontanaCa13379JurupaAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 17,672us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FontanaCa13379JurupaAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 6,604us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FontanaCa13379JurupaAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
13379 Jurupa Ave, Fontana, California | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
600 Burning Tree Rd, Fullerton, California | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FullertonCa600BurningTreeRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 4,762irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FullertonCa600BurningTreeRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,558us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FullertonCa600BurningTreeRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 6,320us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FullertonCa600BurningTreeRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,183us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FullertonCa600BurningTreeRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
600 Burning Tree Rd, Fullerton, California | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
5086 4th St, Irwindale, California | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_IrwindaleCa50864thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 6,800irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_IrwindaleCa50864thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 2,091us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_IrwindaleCa50864thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 8,891us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_IrwindaleCa50864thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,470us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_IrwindaleCa50864thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
5086 4th St, Irwindale, California | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
6933 Preston Ave, Livermore, California | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LivermoreCa6933PrestonAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 14,585irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LivermoreCa6933PrestonAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 12,497us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LivermoreCa6933PrestonAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 27,082us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LivermoreCa6933PrestonAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 5,694us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LivermoreCa6933PrestonAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
6933 Preston Ave, Livermore, California | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1006 North Mansfield, Los Angeles, California | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LosAngelesCa1006NorthMansfieldMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 749irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LosAngelesCa1006NorthMansfieldMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 749us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LosAngelesCa1006NorthMansfieldMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 16us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LosAngelesCa1006NorthMansfieldMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
1006 North Mansfield, Los Angeles, California | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1025 North Highland Ave, Los Angeles, California | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LosAngelesCa1025NorthHighlandAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 10,168irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LosAngelesCa1025NorthHighlandAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 17,842us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LosAngelesCa1025NorthHighlandAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 28,010us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LosAngelesCa1025NorthHighlandAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 9,174us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LosAngelesCa1025NorthHighlandAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
1025 North Highland Ave, Los Angeles, California | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1350 West Grand Ave, Oakland, California | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_OaklandCa1350WestGrandAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 15,172irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_OaklandCa1350WestGrandAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 4,629us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_OaklandCa1350WestGrandAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 19,801us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_OaklandCa1350WestGrandAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 12,476us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_OaklandCa1350WestGrandAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
1350 West Grand Ave, Oakland, California | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1760 North Saint Thomas Circle, Orange, California | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_OrangeCa1760NorthSaintThomasCircleMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 4,576irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_OrangeCa1760NorthSaintThomasCircleMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 4,576us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_OrangeCa1760NorthSaintThomasCircleMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,286us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_OrangeCa1760NorthSaintThomasCircleMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
1760 North Saint Thomas Circle, Orange, California | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
8700 Mercury Lane, Pico Rivera, California | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_V8700MercuryLanePicoMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 27,957irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_V8700MercuryLanePicoMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 67us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_V8700MercuryLanePicoMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 28,024us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_V8700MercuryLanePicoMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 5,811us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_V8700MercuryLanePicoMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
8700 Mercury Lane, Pico Rivera, California | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
8661 Kerns St, San Diego, California | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SanDiegoCa8661KernsStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 10,512irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SanDiegoCa8661KernsStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 6,641us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SanDiegoCa8661KernsStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 17,153us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SanDiegoCa8661KernsStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 4,747us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SanDiegoCa8661KernsStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
8661 Kerns St, San Diego, California | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1915 South Grand Ave, Santa Ana, California | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SantaAnaCa1915SouthGrandAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 3,420irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SantaAnaCa1915SouthGrandAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,095us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SantaAnaCa1915SouthGrandAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 4,515us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SantaAnaCa1915SouthGrandAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,459us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SantaAnaCa1915SouthGrandAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
1915 South Grand Ave, Santa Ana, California | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
2680 Sequoia Dr, South Gate, California | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SouthGateCa2680SequoiaDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 6,329irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SouthGateCa2680SequoiaDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 2,104us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SouthGateCa2680SequoiaDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 8,433us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SouthGateCa2680SequoiaDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 3,222us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SouthGateCa2680SequoiaDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
2680 Sequoia Dr, South Gate, California | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
111 Uranium Drive, Sunnyvale, California | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SunnyvaleCa111UraniumDriveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 9,645irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SunnyvaleCa111UraniumDriveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 4,919us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SunnyvaleCa111UraniumDriveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 14,564us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SunnyvaleCa111UraniumDriveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 3,102us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SunnyvaleCa111UraniumDriveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
111 Uranium Drive, Sunnyvale, California | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
25250 South Schulte Rd, Tracy, California | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TracyCa25250SouthSchulteRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 3,049irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TracyCa25250SouthSchulteRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,615us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TracyCa25250SouthSchulteRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 4,664us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TracyCa25250SouthSchulteRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,354us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TracyCa25250SouthSchulteRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
25250 South Schulte Rd, Tracy, California | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
3576 N. Moline, Aurora, Colorado | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AuroraCo3576N.MolineMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,583irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AuroraCo3576N.MolineMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,827us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AuroraCo3576N.MolineMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 3,410us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AuroraCo3576N.MolineMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,066us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AuroraCo3576N.MolineMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
3576 N. Moline, Aurora, Colorado | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
North Stone Ave, Colorado Springs, Colorado | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 2us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ColoradoSpringsCo3116NorthStoneAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 761irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ColoradoSpringsCo3116NorthStoneAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 2,671us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ColoradoSpringsCo3116NorthStoneAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 3,432us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ColoradoSpringsCo3116NorthStoneAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,174us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ColoradoSpringsCo3116NorthStoneAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
North Stone Ave, Colorado Springs, Colorado | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
11333 E 53rd Ave, Denver, Colorado | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DenverCo11333E53rdAvenueMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 7,403irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DenverCo11333E53rdAvenueMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 9,807us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DenverCo11333E53rdAvenueMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 17,210us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DenverCo11333E53rdAvenueMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 6,187us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DenverCo11333E53rdAvenueMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
11333 E 53rd Ave, Denver, Colorado | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
5151 E. 46th Ave, Denver, Colorado | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DenverCo5151E.46thAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 6,312irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DenverCo5151E.46thAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 6,312us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DenverCo5151E.46thAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 569us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DenverCo5151E.46thAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
5151 E. 46th Ave, Denver, Colorado | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
20 Eastern Park Rd, East Hartford, Connecticut | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_EastHartfordCt20EasternParkRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 7,417irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_EastHartfordCt20EasternParkRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,180us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_EastHartfordCt20EasternParkRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 8,597us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_EastHartfordCt20EasternParkRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 5,044us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_EastHartfordCt20EasternParkRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
20 Eastern Park Rd, East Hartford, Connecticut | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Bennett Rd, Suffield, Connecticut | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 2us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BennettRdSuffieldConnecticutMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,768irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BennettRdSuffieldConnecticutMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 672us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BennettRdSuffieldConnecticutMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 2,440us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BennettRdSuffieldConnecticutMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 967us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BennettRdSuffieldConnecticutMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Bennett Rd, Suffield, Connecticut | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Kennedy Road, Windsor, Connecticut | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 2us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_KennedyRoadWindsorConnecticutMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 10,447irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_KennedyRoadWindsorConnecticutMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 29,062us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_KennedyRoadWindsorConnecticutMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 39,509us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_KennedyRoadWindsorConnecticutMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 12,790us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_KennedyRoadWindsorConnecticutMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Kennedy Road, Windsor, Connecticut | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
293 Ella Grasso Rd, Windsor Locks, Connecticut | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WinsdorLocksCt293EllaGrassoRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 4,021irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WinsdorLocksCt293EllaGrassoRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,274us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WinsdorLocksCt293EllaGrassoRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 5,295us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WinsdorLocksCt293EllaGrassoRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,120us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WinsdorLocksCt293EllaGrassoRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
293 Ella Grasso Rd, Windsor Locks, Connecticut | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
150-200 Todds Ln, Wilmington, Delaware | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WilmingtonDe150200ToddsLnMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 7,226irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WilmingtonDe150200ToddsLnMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 843us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WilmingtonDe150200ToddsLnMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 8,069us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WilmingtonDe150200ToddsLnMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 4,157us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WilmingtonDe150200ToddsLnMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
150-200 Todds Ln, Wilmington, Delaware | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
13280 Vantage Way, Jacksonville, Florida | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_JacksonvilleFl13280VantageWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,853irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_JacksonvilleFl13280VantageWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 192us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_JacksonvilleFl13280VantageWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 2,045us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_JacksonvilleFl13280VantageWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 619us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_JacksonvilleFl13280VantageWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
13280 Vantage Way, Jacksonville, Florida | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
12855 Starkey Rd, Largo, Florida | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LargoFl12855StarkeyRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 3,293irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LargoFl12855StarkeyRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 2,392us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LargoFl12855StarkeyRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 5,685us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LargoFl12855StarkeyRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,192us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LargoFl12855StarkeyRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
12855 Starkey Rd, Largo, Florida | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
10002 Satellite Blvd, Orlando, Florida | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_OrlandoFl10002SatelliteBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,927irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_OrlandoFl10002SatelliteBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 245us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_OrlandoFl10002SatelliteBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 2,172us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_OrlandoFl10002SatelliteBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 631us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_OrlandoFl10002SatelliteBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
10002 Satellite Blvd, Orlando, Florida | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
3501 Electronics Way, West Palm Beach, Florida | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WestPalmBeachFl3501ElectronicsWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 4,201irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WestPalmBeachFl3501ElectronicsWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 12,708us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WestPalmBeachFl3501ElectronicsWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 16,909us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WestPalmBeachFl3501ElectronicsWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 3,978us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WestPalmBeachFl3501ElectronicsWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
3501 Electronics Way, West Palm Beach, Florida | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1890 MacArthur Blvd, Atlanta, Georgia | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AtlantaGa1890MacarthurBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,786irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AtlantaGa1890MacarthurBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 620us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AtlantaGa1890MacarthurBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 2,406us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AtlantaGa1890MacarthurBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 778us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AtlantaGa1890MacarthurBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
1890 MacArthur Blvd, Atlanta, Georgia | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
3881 Old Gordon Rd, Atlanta, Georgia | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AtlantaGa3881OldGordonRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,185irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AtlantaGa3881OldGordonRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 291us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AtlantaGa3881OldGordonRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 1,476us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AtlantaGa3881OldGordonRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 677us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AtlantaGa3881OldGordonRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
3881 Old Gordon Rd, Atlanta, Georgia | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
5319 Tulane Drive SW, Atlanta, Georgia | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AtlantaGa5319TulaneDriveSwMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 2,808irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AtlantaGa5319TulaneDriveSwMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 3,131us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AtlantaGa5319TulaneDriveSwMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 5,939us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AtlantaGa5319TulaneDriveSwMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,846us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AtlantaGa5319TulaneDriveSwMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
5319 Tulane Drive SW, Atlanta, Georgia | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
3150 Nifda Dr, Smyrna, Georgia | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SmyrnaGa3150NifdaDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 463irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SmyrnaGa3150NifdaDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 640us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SmyrnaGa3150NifdaDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 1,103us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SmyrnaGa3150NifdaDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 551us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SmyrnaGa3150NifdaDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
3150 Nifda Dr, Smyrna, Georgia | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1301 S. Rockwell St, Chicago, Illinois | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChicagoIl1301S.RockwellStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 7,947irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChicagoIl1301S.RockwellStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 18,461us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChicagoIl1301S.RockwellStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 26,408us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChicagoIl1301S.RockwellStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 11,484us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChicagoIl1301S.RockwellStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
1301 S. Rockwell St, Chicago, Illinois | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
2211 W. Pershing Rd, Chicago, Illinois | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChicagoIl2211W.PershingRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 4,264irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChicagoIl2211W.PershingRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 12,850us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChicagoIl2211W.PershingRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 17,114us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChicagoIl2211W.PershingRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 5,639us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChicagoIl2211W.PershingRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
2211 W. Pershing Rd, Chicago, Illinois | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
2425 South Halsted St, Chicago, Illinois | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChicagoIl2425SouthHalstedStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 7,470irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChicagoIl2425SouthHalstedStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 925us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChicagoIl2425SouthHalstedStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 8,395us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChicagoIl2425SouthHalstedStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 3,098us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChicagoIl2425SouthHalstedStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
2425 South Halsted St, Chicago, Illinois | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
2604 West 13th St, Chicago, Illinois | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChicagoIl2604West13thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 404irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChicagoIl2604West13thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 2,670us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChicagoIl2604West13thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 3,074us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChicagoIl2604West13thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,111us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChicagoIl2604West13thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
2604 West 13th St, Chicago, Illinois | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
2255 Pratt Blvd, Elk Grove, Illinois | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ElkGroveIl2255PrattBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,989irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ElkGroveIl2255PrattBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 3,622us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ElkGroveIl2255PrattBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 5,611us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ElkGroveIl2255PrattBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 741us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ElkGroveIl2255PrattBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
2255 Pratt Blvd, Elk Grove, Illinois | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
4175 Chandler Dr Opus No. Corp, Hanover Park, Illinois | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HanoverParkIl4175ChandlerDrOpusNo.CorpMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 22,048irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HanoverParkIl4175ChandlerDrOpusNo.CorpMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 17us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HanoverParkIl4175ChandlerDrOpusNo.CorpMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 22,065us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HanoverParkIl4175ChandlerDrOpusNo.CorpMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 5,838us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HanoverParkIl4175ChandlerDrOpusNo.CorpMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
4175 Chandler Dr Opus No. Corp, Hanover Park, Illinois | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
6120 Churchman Bypass, Indianapolis, Indiana | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_IndianapolisIn6120ChurchmanBypassMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 4,827irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_IndianapolisIn6120ChurchmanBypassMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 7,761us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_IndianapolisIn6120ChurchmanBypassMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 12,588us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_IndianapolisIn6120ChurchmanBypassMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 4,013us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_IndianapolisIn6120ChurchmanBypassMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
6120 Churchman Bypass, Indianapolis, Indiana | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
6090 NE 14th Street, Des Moines, Iowa | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DesMoinesIa6090Ne14thStreetMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 622irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DesMoinesIa6090Ne14thStreetMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 313us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DesMoinesIa6090Ne14thStreetMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 935us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DesMoinesIa6090Ne14thStreetMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 247us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DesMoinesIa6090Ne14thStreetMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
6090 NE 14th Street, Des Moines, Iowa | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
South 7th St, Louisville, Kentucky | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 4us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LouisvilleKy2400South7thStBldgDMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 709irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LouisvilleKy2400South7thStBldgDMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 8,166us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LouisvilleKy2400South7thStBldgDMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 8,875us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LouisvilleKy2400South7thStBldgDMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,760us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LouisvilleKy2400South7thStBldgDMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
South 7th St, Louisville, Kentucky | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
900 Distributors Row, New Orleans, Louisiana | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NewOrleansLa900DistributorsRowMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 7,607irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NewOrleansLa900DistributorsRowMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 816us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NewOrleansLa900DistributorsRowMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 8,423us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NewOrleansLa900DistributorsRowMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 4,794us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NewOrleansLa900DistributorsRowMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
900 Distributors Row, New Orleans, Louisiana | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1274 Commercial Drive, Port Allen, Louisiana | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PortAllenLa1274CommercialDriveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 2,680irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PortAllenLa1274CommercialDriveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 3,133us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PortAllenLa1274CommercialDriveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 5,813us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PortAllenLa1274CommercialDriveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,866us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PortAllenLa1274CommercialDriveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
1274 Commercial Drive, Port Allen, Louisiana | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
8928 McGaw Ct, Columbia, Maryland | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ColumbiaMd8928McgawCtMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 2,198irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ColumbiaMd8928McgawCtMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 5,511us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ColumbiaMd8928McgawCtMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 7,709us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ColumbiaMd8928McgawCtMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,130us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ColumbiaMd8928McgawCtMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
8928 McGaw Ct, Columbia, Maryland | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
10641 Iron Bridge Rd, Jessup, Maryland | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_JessupMd10641IronBridgeRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 3,782irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_JessupMd10641IronBridgeRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 689us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_JessupMd10641IronBridgeRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 4,471us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_JessupMd10641IronBridgeRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,831us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_JessupMd10641IronBridgeRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
10641 Iron Bridge Rd, Jessup, Maryland | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
8275 Patuxent Range Rd, Jessup, Maryland | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_JessupMd8275PatuxentRangeRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 10,105irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_JessupMd8275PatuxentRangeRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 7,181us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_JessupMd8275PatuxentRangeRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 17,286us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_JessupMd8275PatuxentRangeRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 7,003us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_JessupMd8275PatuxentRangeRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
8275 Patuxent Range Rd, Jessup, Maryland | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
96 High St, Billerica, Massachusetts | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BillericaMa96HighStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 3,221irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BillericaMa96HighStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 3,776us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BillericaMa96HighStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 6,997us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BillericaMa96HighStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,705us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BillericaMa96HighStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
96 High St, Billerica, Massachusetts | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
120 Hampden St, Boston, Massachusetts | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BostonMa120HampdenStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 164irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BostonMa120HampdenStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 420us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BostonMa120HampdenStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 584us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BostonMa120HampdenStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 388us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BostonMa120HampdenStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
120 Hampden St, Boston, Massachusetts | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
32 George St, Boston, Massachusetts | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BostonMa32GeorgeStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,820irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BostonMa32GeorgeStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 5,067us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BostonMa32GeorgeStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 6,887us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BostonMa32GeorgeStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 4,451us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BostonMa32GeorgeStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
32 George St, Boston, Massachusetts | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
3435 Sharps Lot Rd, Dighton, Massachusetts | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DightonMa3435SharpsLotRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,911irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DightonMa3435SharpsLotRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 514us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DightonMa3435SharpsLotRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 2,425us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DightonMa3435SharpsLotRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,728us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DightonMa3435SharpsLotRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
3435 Sharps Lot Rd, Dighton, Massachusetts | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
77 Constitution Boulevard, Franklin, Massachusetts | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FranklinMa77ConstitutionBoulevardMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 5,413irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FranklinMa77ConstitutionBoulevardMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 48us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FranklinMa77ConstitutionBoulevardMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 5,461us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FranklinMa77ConstitutionBoulevardMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 43us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FranklinMa77ConstitutionBoulevardMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
77 Constitution Boulevard, Franklin, Massachusetts | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
216 Canal St, Lawrence, Massachusetts | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_StLawrenceMa216CanalMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,298irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_StLawrenceMa216CanalMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 975us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_StLawrenceMa216CanalMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 2,273us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_StLawrenceMa216CanalMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 902us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_StLawrenceMa216CanalMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
216 Canal St, Lawrence, Massachusetts | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Bearfoot Road, Northboro, Massachusetts | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 2us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NorthboroMa171BearfootRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 55,923irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NorthboroMa171BearfootRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 18,343us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NorthboroMa171BearfootRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 74,266us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NorthboroMa171BearfootRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 27,786us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NorthboroMa171BearfootRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Bearfoot Road, Northboro, Massachusetts | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
6601 Sterling Dr South, Sterling Heights, Michigan | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SterlingHeightsMi6601SterlingDrSouthMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,294irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SterlingHeightsMi6601SterlingDrSouthMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,048us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SterlingHeightsMi6601SterlingDrSouthMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 2,342us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SterlingHeightsMi6601SterlingDrSouthMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 925us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SterlingHeightsMi6601SterlingDrSouthMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
6601 Sterling Dr South, Sterling Heights, Michigan | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1985 Bart Ave, Warren, Michigan | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WarrenMi1985BartAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,802irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WarrenMi1985BartAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 314us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WarrenMi1985BartAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 2,116us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WarrenMi1985BartAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 784us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WarrenMi1985BartAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
1985 Bart Ave, Warren, Michigan | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Wahl Court, Warren, Michigan | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 2us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WahlCourtWarrenMichiganMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 3,426irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WahlCourtWarrenMichiganMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 2,253us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WahlCourtWarrenMichiganMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 5,679us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WahlCourtWarrenMichiganMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,876us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WahlCourtWarrenMichiganMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Wahl Court, Warren, Michigan | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
31155 Wixom Rd, Wixom, Michigan | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WixomMi31155WixomRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 4,000irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WixomMi31155WixomRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,142us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WixomMi31155WixomRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 5,142us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WixomMi31155WixomRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,906us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WixomMi31155WixomRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
31155 Wixom Rd, Wixom, Michigan | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
3140 Ryder Trail South, Earth City, Missouri | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_EarthCityMo3140RyderTrailSouthMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 3,072irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_EarthCityMo3140RyderTrailSouthMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 2,796us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_EarthCityMo3140RyderTrailSouthMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 5,868us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_EarthCityMo3140RyderTrailSouthMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,414us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_EarthCityMo3140RyderTrailSouthMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
3140 Ryder Trail South, Earth City, Missouri | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Leavenworth St/18th St, Omaha, Nebraska | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 3us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LeavenworthSt18thStOmahaNebraskaMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 2,924irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LeavenworthSt18thStOmahaNebraskaMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 10,273us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LeavenworthSt18thStOmahaNebraskaMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 13,197us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LeavenworthSt18thStOmahaNebraskaMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 3,945us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LeavenworthSt18thStOmahaNebraskaMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Leavenworth St/18th St, Omaha, Nebraska | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
4105 North Lamb Blvd, Las Vegas, Nevada | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LasVegasNv4105NorthLambBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 3,430irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LasVegasNv4105NorthLambBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 8,614us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LasVegasNv4105NorthLambBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 12,044us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LasVegasNv4105NorthLambBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 3,773us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LasVegasNv4105NorthLambBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
4105 North Lamb Blvd, Las Vegas, Nevada | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
17 Hydro Plant Rd, Milton, New Hampshire | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MiltonNh17HydroPlantRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 6,179irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MiltonNh17HydroPlantRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 4,015us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MiltonNh17HydroPlantRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 10,194us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MiltonNh17HydroPlantRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 4,739us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MiltonNh17HydroPlantRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
17 Hydro Plant Rd, Milton, New Hampshire | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Kimberly Rd, East Brunsick, New Jersey | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 3us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_KimberlyRdEastBrunsickNewJerseyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 22,105irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_KimberlyRdEastBrunsickNewJerseyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 5,094us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_KimberlyRdEastBrunsickNewJerseyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 27,199us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_KimberlyRdEastBrunsickNewJerseyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 10,184us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_KimberlyRdEastBrunsickNewJerseyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Kimberly Rd, East Brunsick, New Jersey | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1189 Magnolia Ave, Elizabeth, New Jersey | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ElizabethNj1189MagnoliaAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,278irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ElizabethNj1189MagnoliaAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 2,102us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ElizabethNj1189MagnoliaAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 3,380us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ElizabethNj1189MagnoliaAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,310us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ElizabethNj1189MagnoliaAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
1189 Magnolia Ave, Elizabeth, New Jersey | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
811 Route 33, Freehold, New Jersey | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 3us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Route33811FreeholdNewJerseyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 38,697irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Route33811FreeholdNewJerseyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 49,849us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Route33811FreeholdNewJerseyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 88,546us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Route33811FreeholdNewJerseyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 34,649us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Route33811FreeholdNewJerseyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
811 Route 33, Freehold, New Jersey | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
650 Howard Avenue, Somerset, New Jersey | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SomersetNj650HowardAvenueMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 3,585irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SomersetNj650HowardAvenueMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 11,303us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SomersetNj650HowardAvenueMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 14,888us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SomersetNj650HowardAvenueMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 3,291us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SomersetNj650HowardAvenueMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
650 Howard Avenue, Somerset, New Jersey | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
555 Gallatin Place, Albuquerque, New Mexico | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AlbuquerqueNm555GallatinPlaceMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 4,083irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AlbuquerqueNm555GallatinPlaceMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 377us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AlbuquerqueNm555GallatinPlaceMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 4,460us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AlbuquerqueNm555GallatinPlaceMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,773us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AlbuquerqueNm555GallatinPlaceMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
555 Gallatin Place, Albuquerque, New Mexico | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
7500 Los Volcanes Rd NW, Albuquerque, New Mexico | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AlbuquerqueNm7500LosVolcanesRdNwMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 2,801irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AlbuquerqueNm7500LosVolcanesRdNwMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,791us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AlbuquerqueNm7500LosVolcanesRdNwMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 4,592us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AlbuquerqueNm7500LosVolcanesRdNwMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,944us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AlbuquerqueNm7500LosVolcanesRdNwMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
7500 Los Volcanes Rd NW, Albuquerque, New Mexico | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
100 Bailey Ave, Buffalo, New York | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BuffaloNy100BaileyAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,324irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BuffaloNy100BaileyAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 9,528us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BuffaloNy100BaileyAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 10,852us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BuffaloNy100BaileyAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 4,252us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BuffaloNy100BaileyAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
100 Bailey Ave, Buffalo, New York | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
64 Leone Ln, Chester, New York | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChesterNy64LeoneLnMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 5,086irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChesterNy64LeoneLnMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,047us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChesterNy64LeoneLnMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 6,133us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChesterNy64LeoneLnMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,771us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChesterNy64LeoneLnMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
64 Leone Ln, Chester, New York | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1368 County Rd 8, Farmington, New York | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FarmingtonNy1368CountyRd8Member
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 2,611irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FarmingtonNy1368CountyRd8Member
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 4,411us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FarmingtonNy1368CountyRd8Member
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 7,022us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FarmingtonNy1368CountyRd8Member
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 3,240us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FarmingtonNy1368CountyRd8Member
/ us-gaap_StatementGeographicalAxis
= country_US
 
1368 County Rd 8, Farmington, New York | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
County Rd 10, Linlithgo, New York | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 2us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CountyRd10LinlithgoNewYorkMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 102irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CountyRd10LinlithgoNewYorkMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 2,878us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CountyRd10LinlithgoNewYorkMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 2,980us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CountyRd10LinlithgoNewYorkMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 899us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CountyRd10LinlithgoNewYorkMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
County Rd 10, Linlithgo, New York | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
77 Seaview Blvd, N. Hempstead, New York | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_N.HempsteadNy77SeaviewBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 5,719irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_N.HempsteadNy77SeaviewBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,294us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_N.HempsteadNy77SeaviewBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 7,013us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_N.HempsteadNy77SeaviewBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,648us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_N.HempsteadNy77SeaviewBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
77 Seaview Blvd, N. Hempstead, New York | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
37 Hurds Corner Road, Pawling, New York | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PawlingNy37HurdsCornerRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 4,323irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PawlingNy37HurdsCornerRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 443us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PawlingNy37HurdsCornerRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 4,766us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PawlingNy37HurdsCornerRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,383us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PawlingNy37HurdsCornerRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
37 Hurds Corner Road, Pawling, New York | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Ulster Ave/Route 9W, Port Ewen, New York | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 3us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_UlsterAveRoute9wPortEwenNewYorkMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 23,137irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_UlsterAveRoute9wPortEwenNewYorkMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 7,222us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_UlsterAveRoute9wPortEwenNewYorkMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 30,359us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_UlsterAveRoute9wPortEwenNewYorkMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 17,537us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_UlsterAveRoute9wPortEwenNewYorkMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Ulster Ave/Route 9W, Port Ewen, New York | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Binnewater Rd, Rosendale, New York | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 2us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BinnewaterRdRosendaleNewYorkMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 5,142irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BinnewaterRdRosendaleNewYorkMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 9,291us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BinnewaterRdRosendaleNewYorkMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 14,433us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BinnewaterRdRosendaleNewYorkMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 3,861us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BinnewaterRdRosendaleNewYorkMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Binnewater Rd, Rosendale, New York | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
220 Wavel St, Syracuse, New York | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SyracuseNy220WavelStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 2,929irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SyracuseNy220WavelStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,983us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SyracuseNy220WavelStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 4,912us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SyracuseNy220WavelStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,153us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SyracuseNy220WavelStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
220 Wavel St, Syracuse, New York | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
14500 Weston Pkwy, Cary, North Carolina | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CaryNc14500WestonPkwyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,880irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CaryNc14500WestonPkwyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,619us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CaryNc14500WestonPkwyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 3,499us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CaryNc14500WestonPkwyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,205us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CaryNc14500WestonPkwyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
14500 Weston Pkwy, Cary, North Carolina | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1034 Hulbert Ave, Cincinnati, Ohio | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CincinnatiOh1034HulbertAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 786irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CincinnatiOh1034HulbertAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 794us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CincinnatiOh1034HulbertAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 1,580us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CincinnatiOh1034HulbertAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 659us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CincinnatiOh1034HulbertAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
1034 Hulbert Ave, Cincinnati, Ohio | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1275 East 40th, Cleveland, Ohio | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ClevelandOh1275East40thMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 3,129irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ClevelandOh1275East40thMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 354us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ClevelandOh1275East40thMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 3,483us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ClevelandOh1275East40thMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,487us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ClevelandOh1275East40thMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
1275 East 40th, Cleveland, Ohio | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
7208 Euclid Avenue, Cleveland, Ohio | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ClevelandOh7208EuclidAvenueMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 3,336irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ClevelandOh7208EuclidAvenueMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 2,404us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ClevelandOh7208EuclidAvenueMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 5,740us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ClevelandOh7208EuclidAvenueMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,002us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ClevelandOh7208EuclidAvenueMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
7208 Euclid Avenue, Cleveland, Ohio | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
4260 Tuller Ridge Rd, Dublin, Ohio | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DublinOh4260TullerRidgeRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,030irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DublinOh4260TullerRidgeRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,538us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DublinOh4260TullerRidgeRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 2,568us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DublinOh4260TullerRidgeRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,123us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DublinOh4260TullerRidgeRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
4260 Tuller Ridge Rd, Dublin, Ohio | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
2120 Buzick Drive, Obetz, Ohio | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ObetzOh2120BuzickDriveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 4,317irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ObetzOh2120BuzickDriveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 12,715us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ObetzOh2120BuzickDriveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 17,032us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ObetzOh2120BuzickDriveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 4,534us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ObetzOh2120BuzickDriveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
2120 Buzick Drive, Obetz, Ohio | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
302 South Byrne Rd, Toledo, Ohio | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ToledoOh302SouthByrneRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 602irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ToledoOh302SouthByrneRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 804us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ToledoOh302SouthByrneRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 1,406us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ToledoOh302SouthByrneRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 431us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ToledoOh302SouthByrneRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
302 South Byrne Rd, Toledo, Ohio | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
7530 N. Leadbetter Road, Portland, Oregon | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PortlandOr7530N.LeadbetterRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 5,187irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PortlandOr7530N.LeadbetterRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,813us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PortlandOr7530N.LeadbetterRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 7,000us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PortlandOr7530N.LeadbetterRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 3,214us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PortlandOr7530N.LeadbetterRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
7530 N. Leadbetter Road, Portland, Oregon | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Branchton Rd, Boyers, Pennsylvania | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 2us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BranchtonRdBoyersPennsylvaniaMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 21,166irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BranchtonRdBoyersPennsylvaniaMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 122,202us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BranchtonRdBoyersPennsylvaniaMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 143,368us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BranchtonRdBoyersPennsylvaniaMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 26,668us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BranchtonRdBoyersPennsylvaniaMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Branchton Rd, Boyers, Pennsylvania | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1201 Freedom Rd, Cranberry Township, Pennsylvania | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CranberryTownshipPa1201FreedomRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,057irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CranberryTownshipPa1201FreedomRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 11,953us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CranberryTownshipPa1201FreedomRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 13,010us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CranberryTownshipPa1201FreedomRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 4,698us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CranberryTownshipPa1201FreedomRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
1201 Freedom Rd, Cranberry Township, Pennsylvania | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
800 Carpenters Crossings, Folcroft, Pennsylvania | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FolcroftPa800CarpentersCrossingsMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 2,457irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FolcroftPa800CarpentersCrossingsMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 853us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FolcroftPa800CarpentersCrossingsMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 3,310us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FolcroftPa800CarpentersCrossingsMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,513us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FolcroftPa800CarpentersCrossingsMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
800 Carpenters Crossings, Folcroft, Pennsylvania | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
36 Great Valley Pkwy, Malvern, Pennsylvania | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MalvernPa36GreatValleyPkwyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 2,397irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MalvernPa36GreatValleyPkwyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 6,421us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MalvernPa36GreatValleyPkwyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 8,818us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MalvernPa36GreatValleyPkwyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,641us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MalvernPa36GreatValleyPkwyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
36 Great Valley Pkwy, Malvern, Pennsylvania | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Henderson Dr/Elmwood Ave, Sharon Hill, Pennsylvania | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 3us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HendersonDrElmwoodAveSharonHillPennsylvaniaMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 24,153irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HendersonDrElmwoodAveSharonHillPennsylvaniaMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 9,562us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HendersonDrElmwoodAveSharonHillPennsylvaniaMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 33,715us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HendersonDrElmwoodAveSharonHillPennsylvaniaMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 12,690us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HendersonDrElmwoodAveSharonHillPennsylvaniaMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Henderson Dr/Elmwood Ave, Sharon Hill, Pennsylvania | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Las Flores Industrial Park, Rio Grande, Puerto Rico | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_RioGrandePrLasFloresIndustrialParkMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 4,185irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_RioGrandePrLasFloresIndustrialParkMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 3,225us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_RioGrandePrLasFloresIndustrialParkMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 7,410us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_RioGrandePrLasFloresIndustrialParkMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,986us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_RioGrandePrLasFloresIndustrialParkMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Las Flores Industrial Park, Rio Grande, Puerto Rico | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
24 Snake Hill Road, Chepachet, Rhode Island | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChepachetRi24SnakeHillRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 2,659irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChepachetRi24SnakeHillRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,995us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChepachetRi24SnakeHillRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 4,654us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChepachetRi24SnakeHillRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,955us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChepachetRi24SnakeHillRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
24 Snake Hill Road, Chepachet, Rhode Island | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Mitchell Street, Knoxville, Tennessee | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 2us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MitchellStreetKnoxvilleTennesseeMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 718irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MitchellStreetKnoxvilleTennesseeMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 3,752us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MitchellStreetKnoxvilleTennesseeMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 4,470us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MitchellStreetKnoxvilleTennesseeMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,053us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MitchellStreetKnoxvilleTennesseeMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Mitchell Street, Knoxville, Tennessee | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
415 Brick Church Park Dr, Nashville, Tennessee | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NashvilleTn415BrickChurchParkDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 2,312irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NashvilleTn415BrickChurchParkDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 3,681us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NashvilleTn415BrickChurchParkDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 5,993us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NashvilleTn415BrickChurchParkDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,691us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NashvilleTn415BrickChurchParkDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
415 Brick Church Park Dr, Nashville, Tennessee | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
6005 Dana Way, Nashville, Tennessee | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 2us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NashvilleTn6005DanaWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,827irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NashvilleTn6005DanaWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,802us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NashvilleTn6005DanaWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 3,629us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NashvilleTn6005DanaWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,142us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NashvilleTn6005DanaWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
6005 Dana Way, Nashville, Tennessee | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
11406 Metric Blvd, Austin, Texas | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AustinTx11406MetricBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 5,489irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AustinTx11406MetricBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,725us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AustinTx11406MetricBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 7,214us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AustinTx11406MetricBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 3,025us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AustinTx11406MetricBlvdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
11406 Metric Blvd, Austin, Texas | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
6600 Metropolis Drive, Austin, Texas | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AustinTx6600MetropolisDriveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 4,519irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AustinTx6600MetropolisDriveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 242us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AustinTx6600MetropolisDriveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 4,761us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AustinTx6600MetropolisDriveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 531us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AustinTx6600MetropolisDriveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
6600 Metropolis Drive, Austin, Texas | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1800 Columbian Club Dr, Carrollton, Texas | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CarrolltonTx1800ColumbianClubDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 19,673irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CarrolltonTx1800ColumbianClubDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 64us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CarrolltonTx1800ColumbianClubDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 19,737us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CarrolltonTx1800ColumbianClubDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 6,020us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CarrolltonTx1800ColumbianClubDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
1800 Columbian Club Dr, Carrollton, Texas | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1905 John Connally Dr, Carrollton, Texas | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CarrolltonTx1905JohnConnallyDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 2,174irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CarrolltonTx1905JohnConnallyDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 394us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CarrolltonTx1905JohnConnallyDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 2,568us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CarrolltonTx1905JohnConnallyDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 960us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CarrolltonTx1905JohnConnallyDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
1905 John Connally Dr, Carrollton, Texas | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Alma St, Dallas, Texas | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 2us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AlmaStDallasTexasMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 3,431irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AlmaStDallasTexasMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,297us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AlmaStDallasTexasMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 4,728us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AlmaStDallasTexasMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,020us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AlmaStDallasTexasMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Alma St, Dallas, Texas | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
13425 Branchview Ln, Dallas, Texas | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DallasTx13425BranchviewLnMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 3,518irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DallasTx13425BranchviewLnMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 3,237us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DallasTx13425BranchviewLnMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 6,755us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DallasTx13425BranchviewLnMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 3,099us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DallasTx13425BranchviewLnMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
13425 Branchview Ln, Dallas, Texas | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Cockrell Ave, Dallas, Texas | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 2us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CockrellAveDallasTexasMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 3,950irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CockrellAveDallasTexasMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,914us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CockrellAveDallasTexasMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 5,864us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CockrellAveDallasTexasMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,652us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CockrellAveDallasTexasMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cockrell Ave, Dallas, Texas | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1819 S. Lamar St, Dallas, Texas | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DallasTx1819S.LamarStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 3,215irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DallasTx1819S.LamarStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 596us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DallasTx1819S.LamarStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 3,811us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DallasTx1819S.LamarStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,849us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DallasTx1819S.LamarStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
1819 S. Lamar St, Dallas, Texas | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
2000 Robotics Place Suite B, Fort Worth, Texas | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FortWorthTx2000RoboticsPlaceSuiteBMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 5,328irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FortWorthTx2000RoboticsPlaceSuiteBMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 450us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FortWorthTx2000RoboticsPlaceSuiteBMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 5,778us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FortWorthTx2000RoboticsPlaceSuiteBMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,051us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FortWorthTx2000RoboticsPlaceSuiteBMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
2000 Robotics Place Suite B, Fort Worth, Texas | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1202 Ave R, Grand Prairie, Texas | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_GrandPrairieTx1202AveRMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 8,354irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_GrandPrairieTx1202AveRMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,660us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_GrandPrairieTx1202AveRMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 10,014us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_GrandPrairieTx1202AveRMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 4,245us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_GrandPrairieTx1202AveRMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
1202 Ave R, Grand Prairie, Texas | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
15333 Hempstead Hwy, Houston, Texas | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 3us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HempsteadHwy15333HoustonTexasMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 6,327irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HempsteadHwy15333HoustonTexasMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 33,410us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HempsteadHwy15333HoustonTexasMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 39,737us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HempsteadHwy15333HoustonTexasMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 5,615us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HempsteadHwy15333HoustonTexasMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
15333 Hempstead Hwy, Houston, Texas | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
2600 Center Street, Houston, Texas | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx2600CenterStreetBldgMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 2,840irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx2600CenterStreetBldgMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,335us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx2600CenterStreetBldgMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 4,175us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx2600CenterStreetBldgMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,870us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx2600CenterStreetBldgMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
2600 Center Street, Houston, Texas | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
3502 Bissonnet St, Houston, Texas | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx3502BissonnetStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 7,687irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx3502BissonnetStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 178us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx3502BissonnetStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 7,865us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx3502BissonnetStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 5,062us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx3502BissonnetStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
3502 Bissonnet St, Houston, Texas | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
5249 Glenmont Ave, Houston, Texas | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx5249GlenmontAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 3,467irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx5249GlenmontAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,775us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx5249GlenmontAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 5,242us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx5249GlenmontAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,786us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx5249GlenmontAveMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
5249 Glenmont Ave, Houston, Texas | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
5707 Chimney Rock, Houston, Texas | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx5707ChimneyRockMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,032irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx5707ChimneyRockMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 916us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx5707ChimneyRockMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 1,948us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx5707ChimneyRockMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 746us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx5707ChimneyRockMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
5707 Chimney Rock, Houston, Texas | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
5757 Royalton Dr, Houston, Texas | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx5757RoyaltonDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,795irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx5757RoyaltonDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 863us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx5757RoyaltonDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 2,658us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx5757RoyaltonDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 864us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx5757RoyaltonDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
5757 Royalton Dr, Houston, Texas | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
6203 Bingle Rd, Houston, Texas | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx6203BingleRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 3,188irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx6203BingleRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 10,845us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx6203BingleRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 14,033us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx6203BingleRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 6,609us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx6203BingleRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
6203 Bingle Rd, Houston, Texas | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
9601 West Tidwell, Houston, Texas | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx9601WestTidwellMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,680irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx9601WestTidwellMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 486us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx9601WestTidwellMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 2,166us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx9601WestTidwellMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 756us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HoustonTx9601WestTidwellMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
9601 West Tidwell, Houston, Texas | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1235 North Union Bower, Irving, Texas | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_IrvingTx1235NorthUnionBowerMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,574irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_IrvingTx1235NorthUnionBowerMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 960us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_IrvingTx1235NorthUnionBowerMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 2,534us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_IrvingTx1235NorthUnionBowerMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 944us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_IrvingTx1235NorthUnionBowerMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
1235 North Union Bower, Irving, Texas | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
15300 FM 1825, Pflugerville, Texas | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 2us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Fm182515300PflugervilleTexasMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 3,811irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Fm182515300PflugervilleTexasMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 7,381us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Fm182515300PflugervilleTexasMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 11,192us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Fm182515300PflugervilleTexasMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,991us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Fm182515300PflugervilleTexasMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
15300 FM 1825, Pflugerville, Texas | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
929 South Medina St, San Antonio, Texas | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SanAntonioTx929SouthMedinaStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 3,883irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SanAntonioTx929SouthMedinaStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,079us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SanAntonioTx929SouthMedinaStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 4,962us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SanAntonioTx929SouthMedinaStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,901us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SanAntonioTx929SouthMedinaStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
929 South Medina St, San Antonio, Texas | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
930 Avenue B, San Antonio, Texas | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SanAntonioTx930AvenueBMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 393irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SanAntonioTx930AvenueBMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 171us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SanAntonioTx930AvenueBMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 564us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SanAntonioTx930AvenueBMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 153us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SanAntonioTx930AvenueBMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
930 Avenue B, San Antonio, Texas | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
931 North Broadway, San Antonio, Texas | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SanAntonioTx931NorthBroadwayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 3,526irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SanAntonioTx931NorthBroadwayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 759us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SanAntonioTx931NorthBroadwayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 4,285us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SanAntonioTx931NorthBroadwayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,142us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SanAntonioTx931NorthBroadwayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
931 North Broadway, San Antonio, Texas | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1665 S. 5350 West, Salt Lake City, Utah | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SaltLakeCityUt1665S.5350WestMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 6,239irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SaltLakeCityUt1665S.5350WestMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 2,361us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SaltLakeCityUt1665S.5350WestMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 8,600us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SaltLakeCityUt1665S.5350WestMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 3,524us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SaltLakeCityUt1665S.5350WestMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
1665 S. 5350 West, Salt Lake City, Utah | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
11052 Lakeridge Pkwy, Ashland, Virginia | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AshlandVa11052LakeridgePkwyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,709irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AshlandVa11052LakeridgePkwyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,813us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AshlandVa11052LakeridgePkwyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 3,522us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AshlandVa11052LakeridgePkwyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,197us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AshlandVa11052LakeridgePkwyMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
11052 Lakeridge Pkwy, Ashland, Virginia | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
4555 Progress Road, Norfolk, Virginia | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NorfolkVa4555ProgressRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 6,527irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NorfolkVa4555ProgressRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 209us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NorfolkVa4555ProgressRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 6,736us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NorfolkVa4555ProgressRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,922us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NorfolkVa4555ProgressRoadMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
4555 Progress Road, Norfolk, Virginia | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
7700-7730 Southern Dr, Springfield, Virginia | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SpringfieldVa77007730SouthernDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 14,167irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SpringfieldVa77007730SouthernDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,813us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SpringfieldVa77007730SouthernDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 15,980us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SpringfieldVa77007730SouthernDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 7,835us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SpringfieldVa77007730SouthernDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
7700-7730 Southern Dr, Springfield, Virginia | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
8001 Research Way, Springfield, Virginia | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SpringfieldVa8001ResearchWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 5,230irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SpringfieldVa8001ResearchWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 2,309us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SpringfieldVa8001ResearchWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 7,539us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SpringfieldVa8001ResearchWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,119us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SpringfieldVa8001ResearchWayMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
8001 Research Way, Springfield, Virginia | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
22445 Randolph Dr, Sterling, Virginia | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SterlingVa22445RandolphDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 7,598irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SterlingVa22445RandolphDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 3,647us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SterlingVa22445RandolphDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 11,245us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SterlingVa22445RandolphDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 4,324us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SterlingVa22445RandolphDrMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
22445 Randolph Dr, Sterling, Virginia | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
307 South 140th St, Burien, Washington | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BurienWa307South140thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 2,078irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BurienWa307South140thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 2,062us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BurienWa307South140thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 4,140us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BurienWa307South140thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,653us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BurienWa307South140thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
307 South 140th St, Burien, Washington | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
8908 W. Hallett Rd, Cheney, Washington | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CheneyWa8908W.HallettRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 510irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CheneyWa8908W.HallettRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 3,915us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CheneyWa8908W.HallettRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 4,425us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CheneyWa8908W.HallettRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 1,177us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CheneyWa8908W.HallettRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
8908 W. Hallett Rd, Cheney, Washington | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
6600 Hardeson Rd, Everett, Washington | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_EverettWa6600HardesonRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 5,399irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_EverettWa6600HardesonRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 3,190us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_EverettWa6600HardesonRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 8,589us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_EverettWa6600HardesonRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,428us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_EverettWa6600HardesonRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
6600 Hardeson Rd, Everett, Washington | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
19826 Russell Rd South, Kent, Washington | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_KentWa19826RussellRdSouthMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 14,793irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_KentWa19826RussellRdSouthMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 8,047us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_KentWa19826RussellRdSouthMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 22,840us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_KentWa19826RussellRdSouthMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 7,270us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_KentWa19826RussellRdSouthMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
19826 Russell Rd South, Kent, Washington | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1201 N. 96th St, Seattle, Washington | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SeattleWa1201N.96thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 4,496irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SeattleWa1201N.96thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 1,122us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SeattleWa1201N.96thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 5,618us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SeattleWa1201N.96thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 2,557us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SeattleWa1201N.96thStMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
1201 N. 96th St, Seattle, Washington | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
12021 West Bluemound Rd, Wauwatosa, Wisconsin | United States    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WauwatosaWi12021WestBluemoundRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Initial cost to Company 1,307irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WauwatosaWi12021WestBluemoundRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Cost capitalized subsequent to acquisition 2,040us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WauwatosaWi12021WestBluemoundRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Gross amount carried at close of current period (1) (2) 3,347us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WauwatosaWi12021WestBluemoundRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Accumulated depreciation at close of current period (1) (2) 942us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WauwatosaWi12021WestBluemoundRdMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
12021 West Bluemound Rd, Wauwatosa, Wisconsin | United States | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
One Command Court, Bedford | Canada    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BedfordOneCommandCourtHalifaxMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Initial cost to Company 3,847irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BedfordOneCommandCourtHalifaxMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Cost capitalized subsequent to acquisition 4,809us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BedfordOneCommandCourtHalifaxMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Gross amount carried at close of current period (1) (2) 8,656us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BedfordOneCommandCourtHalifaxMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Accumulated depreciation at close of current period (1) (2) 2,941us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BedfordOneCommandCourtHalifaxMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
One Command Court, Bedford | Canada | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
195 Summerlea Road, Brampton | Canada    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Brampton195SummerleaRoadMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Initial cost to Company 5,403irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Brampton195SummerleaRoadMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Cost capitalized subsequent to acquisition 5,737us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Brampton195SummerleaRoadMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Gross amount carried at close of current period (1) (2) 11,140us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Brampton195SummerleaRoadMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Accumulated depreciation at close of current period (1) (2) 3,878us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Brampton195SummerleaRoadMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
195 Summerlea Road, Brampton | Canada | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
10 Tilbury Court, Brampton | Canada    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Brampton10TilburyCourtMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Initial cost to Company 5,007irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Brampton10TilburyCourtMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Cost capitalized subsequent to acquisition 16,195us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Brampton10TilburyCourtMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Gross amount carried at close of current period (1) (2) 21,202us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Brampton10TilburyCourtMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Accumulated depreciation at close of current period (1) (2) 4,284us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Brampton10TilburyCourtMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
10 Tilbury Court, Brampton | Canada | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
8825 Northbrook Court, Burnaby | Canada    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Burnaby8825NorthbrookCourtMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Initial cost to Company 8,091irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Burnaby8825NorthbrookCourtMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Cost capitalized subsequent to acquisition 1,448us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Burnaby8825NorthbrookCourtMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Gross amount carried at close of current period (1) (2) 9,539us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Burnaby8825NorthbrookCourtMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Accumulated depreciation at close of current period (1) (2) 3,560us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Burnaby8825NorthbrookCourtMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
8825 Northbrook Court, Burnaby | Canada | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
8088 Glenwood Drive, Burnaby | Canada    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Burnaby8088GlenwoodDriveMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Initial cost to Company 4,326irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Burnaby8088GlenwoodDriveMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Cost capitalized subsequent to acquisition 8,040us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Burnaby8088GlenwoodDriveMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Gross amount carried at close of current period (1) (2) 12,366us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Burnaby8088GlenwoodDriveMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Accumulated depreciation at close of current period (1) (2) 3,170us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Burnaby8088GlenwoodDriveMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
8088 Glenwood Drive, Burnaby | Canada | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
5811 26th Street S.E., Calgary | Canada    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Calgary581126thStreetS.e.Member
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Initial cost to Company 14,658irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Calgary581126thStreetS.e.Member
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Cost capitalized subsequent to acquisition 10,383us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Calgary581126thStreetS.e.Member
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Gross amount carried at close of current period (1) (2) 25,041us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Calgary581126thStreetS.e.Member
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Accumulated depreciation at close of current period (1) (2) 8,384us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Calgary581126thStreetS.e.Member
/ us-gaap_StatementGeographicalAxis
= country_CA
 
5811 26th Street S.E., Calgary | Canada | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
3905 - 101 Street, Edmonton | Canada    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Edmonton3905101StreetMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Initial cost to Company 2,020irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Edmonton3905101StreetMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Cost capitalized subsequent to acquisition 829us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Edmonton3905101StreetMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Gross amount carried at close of current period (1) (2) 2,849us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Edmonton3905101StreetMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Accumulated depreciation at close of current period (1) (2) 1,223us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Edmonton3905101StreetMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
3905 - 101 Street, Edmonton | Canada | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
3005 Boul. Jean-Baptiste Deschamps, Lachine | Canada    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Lachine3005Boul.JeanBaptisteDeschampsMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Initial cost to Company 2,751irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Lachine3005Boul.JeanBaptisteDeschampsMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Cost capitalized subsequent to acquisition 453us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Lachine3005Boul.JeanBaptisteDeschampsMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Gross amount carried at close of current period (1) (2) 3,204us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Lachine3005Boul.JeanBaptisteDeschampsMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Accumulated depreciation at close of current period (1) (2) 1,097us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Lachine3005Boul.JeanBaptisteDeschampsMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
3005 Boul. Jean-Baptiste Deschamps, Lachine | Canada | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1655 Fleetwood, Laval | Canada    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Laval1655FleetwoodMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Initial cost to Company 8,196irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Laval1655FleetwoodMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Cost capitalized subsequent to acquisition 16,495us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Laval1655FleetwoodMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Gross amount carried at close of current period (1) (2) 24,691us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Laval1655FleetwoodMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Accumulated depreciation at close of current period (1) (2) 9,062us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Laval1655FleetwoodMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
1655 Fleetwood, Laval | Canada | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
4005 Richelieu, Montreal | Canada    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Montreal4005RichelieuMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Initial cost to Company 1,800irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Montreal4005RichelieuMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Cost capitalized subsequent to acquisition 1,343us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Montreal4005RichelieuMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Gross amount carried at close of current period (1) (2) 3,143us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Montreal4005RichelieuMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Accumulated depreciation at close of current period (1) (2) 1,183us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Montreal4005RichelieuMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
4005 Richelieu, Montreal | Canada | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1209 Algoma Rd, Ottawa | Canada    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Ottawa1209AlgomaRdMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Initial cost to Company 1,059irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Ottawa1209AlgomaRdMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Cost capitalized subsequent to acquisition 6,759us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Ottawa1209AlgomaRdMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Gross amount carried at close of current period (1) (2) 7,818us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Ottawa1209AlgomaRdMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Accumulated depreciation at close of current period (1) (2) 2,836us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Ottawa1209AlgomaRdMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
1209 Algoma Rd, Ottawa | Canada | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
1650 Comstock Rd, Ottawa | Canada    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Ottawa1650ComstockRdMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Initial cost to Company 7,691irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Ottawa1650ComstockRdMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Cost capitalized subsequent to acquisition 2,697us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Ottawa1650ComstockRdMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Gross amount carried at close of current period (1) (2) 10,388us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Ottawa1650ComstockRdMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Accumulated depreciation at close of current period (1) (2) 2,113us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Ottawa1650ComstockRdMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
1650 Comstock Rd, Ottawa | Canada | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
235 Edson Street, Saskatoon | Canada    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Saskatoon235EdsonStreetMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Initial cost to Company 829irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Saskatoon235EdsonStreetMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Cost capitalized subsequent to acquisition 1,562us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Saskatoon235EdsonStreetMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Gross amount carried at close of current period (1) (2) 2,391us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Saskatoon235EdsonStreetMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Accumulated depreciation at close of current period (1) (2) 549us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Saskatoon235EdsonStreetMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
235 Edson Street, Saskatoon | Canada | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
640 Coronation Drive, Scarborough | Canada    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Scarborough640CoronationDriveMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Initial cost to Company 1,853irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Scarborough640CoronationDriveMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Cost capitalized subsequent to acquisition 1,023us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Scarborough640CoronationDriveMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Gross amount carried at close of current period (1) (2) 2,876us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Scarborough640CoronationDriveMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Accumulated depreciation at close of current period (1) (2) 964us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Scarborough640CoronationDriveMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
640 Coronation Drive, Scarborough | Canada | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
610 Sprucewood Ave, Windsor | Canada    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Windsor610SprucewoodAveMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Initial cost to Company 1,243irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Windsor610SprucewoodAveMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Cost capitalized subsequent to acquisition 537us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Windsor610SprucewoodAveMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Gross amount carried at close of current period (1) (2) 1,780us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Windsor610SprucewoodAveMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
Accumulated depreciation at close of current period (1) (2) 416us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Windsor610SprucewoodAveMember
/ us-gaap_StatementGeographicalAxis
= country_CA
 
610 Sprucewood Ave, Windsor | Canada | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Gewerbeparkstr. 3, Vienna, Austria | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ViennaGewerbeparkstr.3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 6,542irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ViennaGewerbeparkstr.3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 1,777us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ViennaGewerbeparkstr.3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 8,319us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ViennaGewerbeparkstr.3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 1,260us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ViennaGewerbeparkstr.3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gewerbeparkstr. 3, Vienna, Austria | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Woluwelaan 147, Diegem, Belgium | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DiegemWoluwelaan147Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 2,541irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DiegemWoluwelaan147Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 4,975us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DiegemWoluwelaan147Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 7,516us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DiegemWoluwelaan147Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 2,504us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DiegemWoluwelaan147Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Woluwelaan 147, Diegem, Belgium | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Jeumont-Schneider, Champagne Sur Seine, France | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 3us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_JeumontSchneiderChampagneSurSeineFranceMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 1,750irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_JeumontSchneiderChampagneSurSeineFranceMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 1,551us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_JeumontSchneiderChampagneSurSeineFranceMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 3,301us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_JeumontSchneiderChampagneSurSeineFranceMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 1,231us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_JeumontSchneiderChampagneSurSeineFranceMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Jeumont-Schneider, Champagne Sur Seine, France | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
ZI des Sables, Morangis, France | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MorangisZiDesSablesMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Encumbrances 2,235us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MorangisZiDesSablesMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 12,407irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MorangisZiDesSablesMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 12,407us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MorangisZiDesSablesMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 5,830us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MorangisZiDesSablesMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
ZI des Sables, Morangis, France | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Brommer Weg 1, Wipshausen, Germany | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WipshausenBrommerWeg1Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 3,220irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WipshausenBrommerWeg1Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 3,220us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WipshausenBrommerWeg1Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 1,697us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_WipshausenBrommerWeg1Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Brommer Weg 1, Wipshausen, Germany | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Warehouse and Offices 4 Springhill, Cork, Ireland | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CorkWarehouseAndOffices4SpringhillMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 9,040irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CorkWarehouseAndOffices4SpringhillMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 1,653us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CorkWarehouseAndOffices4SpringhillMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 10,693us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CorkWarehouseAndOffices4SpringhillMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 2,754us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CorkWarehouseAndOffices4SpringhillMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Warehouse and Offices 4 Springhill, Cork, Ireland | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
17 Crag Terrace, Dublin, Ireland | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CragTerrace17DublinIrelandMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 2,818irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CragTerrace17DublinIrelandMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 996us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CragTerrace17DublinIrelandMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 3,814us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CragTerrace17DublinIrelandMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 960us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CragTerrace17DublinIrelandMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
17 Crag Terrace, Dublin, Ireland | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Damastown Industrial Park, Dublin, Ireland | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DublinDamastownIndustrialParkMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 16,034irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DublinDamastownIndustrialParkMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 5,781us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DublinDamastownIndustrialParkMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 21,815us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DublinDamastownIndustrialParkMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 4,210us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_DublinDamastownIndustrialParkMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Damastown Industrial Park, Dublin, Ireland | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Howemoss Drive, Aberdeen, Scotland | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 2us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HowemossDriveAberdeenScotlandMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 6,970irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HowemossDriveAberdeenScotlandMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 7,559us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HowemossDriveAberdeenScotlandMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 14,529us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HowemossDriveAberdeenScotlandMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 3,084us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HowemossDriveAberdeenScotlandMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Howemoss Drive, Aberdeen, Scotland | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Traquair Road, Innerleithen, Scotland | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TraquairRoadInnerleithenScotlandMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 113irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TraquairRoadInnerleithenScotlandMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 2,497us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TraquairRoadInnerleithenScotlandMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 2,610us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TraquairRoadInnerleithenScotlandMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 794us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TraquairRoadInnerleithenScotlandMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Traquair Road, Innerleithen, Scotland | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Nettlehill Road, Houston Industrial Estate, Livingston, Scotland | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NettlehillRoadHoustonIndustrialEstateLivingstonScotlandMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 11,517irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NettlehillRoadHoustonIndustrialEstateLivingstonScotlandMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 29,434us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NettlehillRoadHoustonIndustrialEstateLivingstonScotlandMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 40,951us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NettlehillRoadHoustonIndustrialEstateLivingstonScotlandMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 14,604us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_NettlehillRoadHoustonIndustrialEstateLivingstonScotlandMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Nettlehill Road, Houston Industrial Estate, Livingston, Scotland | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Av Madrid s/n Poligono Industrial Matillas, Alcala de Henares, Spain | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AvMadridSNPoligonoIndustrialMatillasMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 186irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AvMadridSNPoligonoIndustrialMatillasMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 186us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AvMadridSNPoligonoIndustrialMatillasMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Av Madrid s/n Poligono Industrial Matillas, Alcala de Henares, Spain | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Calle Bronce, 37, Chiloeches, Spain | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChiloechesGuadalajaraCalleBronce37Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 11,011irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChiloechesGuadalajaraCalleBronce37Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 2,808us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChiloechesGuadalajaraCalleBronce37Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 13,819us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChiloechesGuadalajaraCalleBronce37Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 1,552us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ChiloechesGuadalajaraCalleBronce37Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Calle Bronce, 37, Chiloeches, Spain | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Ctra M.118 , Km.3 Parcela 3, Madrid, Spain | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MadridCtraM.118Km.3Parcela3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 3,981irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MadridCtraM.118Km.3Parcela3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 6,054us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MadridCtraM.118Km.3Parcela3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 10,035us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MadridCtraM.118Km.3Parcela3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 4,703us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MadridCtraM.118Km.3Parcela3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Ctra M.118 , Km.3 Parcela 3, Madrid, Spain | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Fundicion 8, Rivas-Vaciamadrid, Spain | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_RivasVaciamadridFundicion8Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 1,022irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_RivasVaciamadridFundicion8Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 2,594us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_RivasVaciamadridFundicion8Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 3,616us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_RivasVaciamadridFundicion8Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 1,221us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_RivasVaciamadridFundicion8Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Fundicion 8, Rivas-Vaciamadrid, Spain | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Abanto Ciervava, Spain | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 2us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AbantoCiervavaSpainMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 1,053irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AbantoCiervavaSpainMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 1,053us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AbantoCiervavaSpainMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 412us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AbantoCiervavaSpainMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Abanto Ciervava, Spain | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
628 Western Avenue, Acton, United Kingdom | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Acton628WesternAvenueMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 2,070irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Acton628WesternAvenueMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 87us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Acton628WesternAvenueMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 2,157us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Acton628WesternAvenueMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 766us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Acton628WesternAvenueMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
628 Western Avenue, Acton, United Kingdom | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
65 Egerton Road, Birmingham, United Kingdom | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Birmingham65EgertonRoadMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 6,980irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Birmingham65EgertonRoadMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 2,897us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Birmingham65EgertonRoadMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 9,877us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Birmingham65EgertonRoadMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 4,355us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Birmingham65EgertonRoadMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
65 Egerton Road, Birmingham, United Kingdom | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Otterham Quay Lane, Gillingham, United Kingdom | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 13us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_OtterhamQuayLaneGillinghamUnitedKingdomMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 7,418irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_OtterhamQuayLaneGillinghamUnitedKingdomMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 4,874us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_OtterhamQuayLaneGillinghamUnitedKingdomMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 12,292us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_OtterhamQuayLaneGillinghamUnitedKingdomMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 4,730us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_OtterhamQuayLaneGillinghamUnitedKingdomMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Otterham Quay Lane, Gillingham, United Kingdom | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Pennine Way, Hemel Hempstead, United Kingdom | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PennineWayHemelHempsteadUnitedKingdomMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 10,847irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PennineWayHemelHempsteadUnitedKingdomMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 7,482us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PennineWayHemelHempsteadUnitedKingdomMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 18,329us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PennineWayHemelHempsteadUnitedKingdomMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 6,356us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PennineWayHemelHempsteadUnitedKingdomMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Pennine Way, Hemel Hempstead, United Kingdom | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Kemble Industrial Park, Kemble, United Kingdom | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 2us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_KembleSiteD1KembleIndustrialParkMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 5,277irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_KembleSiteD1KembleIndustrialParkMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 8,926us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_KembleSiteD1KembleIndustrialParkMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 14,203us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_KembleSiteD1KembleIndustrialParkMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 8,157us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_KembleSiteD1KembleIndustrialParkMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Kemble Industrial Park, Kemble, United Kingdom | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Gayton Road, Kings Lynn, United Kingdom | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 3us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_GaytonRoadKingsLynnUnitedKingdomMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 3,119irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_GaytonRoadKingsLynnUnitedKingdomMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 1,872us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_GaytonRoadKingsLynnUnitedKingdomMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 4,991us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_GaytonRoadKingsLynnUnitedKingdomMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 2,783us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_GaytonRoadKingsLynnUnitedKingdomMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gayton Road, Kings Lynn, United Kingdom | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
24/26 Gillender Street, London, United Kingdom | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_London2426GillenderStreetMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 4,666irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_London2426GillenderStreetMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 2,910us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_London2426GillenderStreetMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 7,576us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_London2426GillenderStreetMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 2,390us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_London2426GillenderStreetMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
24/26 Gillender Street, London, United Kingdom | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Cody Road, London, United Kingdom | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 2us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CodyRoadLondonUnitedKingdomMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 20,307irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CodyRoadLondonUnitedKingdomMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 9,204us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CodyRoadLondonUnitedKingdomMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 29,511us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CodyRoadLondonUnitedKingdomMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 9,212us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CodyRoadLondonUnitedKingdomMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cody Road, London, United Kingdom | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Unit 10 High Cross Centre, London, United Kingdom | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LondonUnit10HighCrossCentreMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 3,598irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LondonUnit10HighCrossCentreMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 1,104us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LondonUnit10HighCrossCentreMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 4,702us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LondonUnit10HighCrossCentreMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 1,153us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LondonUnit10HighCrossCentreMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Unit 10 High Cross Centre, London, United Kingdom | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Old Poplar Bus Garage, London, United Kingdom | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LondonOldPoplarBusGarageMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 4,639irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LondonOldPoplarBusGarageMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 2,923us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LondonOldPoplarBusGarageMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 7,562us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LondonOldPoplarBusGarageMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 3,237us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_LondonOldPoplarBusGarageMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Old Poplar Bus Garage, London, United Kingdom | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
17 Broadgate, Oldham, United Kingdom | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Oldham17BroadgateMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 4,039irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Oldham17BroadgateMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 1,076us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Oldham17BroadgateMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 5,115us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Oldham17BroadgateMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 2,074us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Oldham17BroadgateMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
17 Broadgate, Oldham, United Kingdom | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Harpway Lane, Sopley, United Kingdom | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SopleyHarpwayLaneMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 681irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SopleyHarpwayLaneMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 1,781us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SopleyHarpwayLaneMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 2,462us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SopleyHarpwayLaneMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 1,208us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SopleyHarpwayLaneMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Harpway Lane, Sopley, United Kingdom | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Unit 1A Broadmoor Road, Swindom, United Kingdom | Europe    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SwindonUnit1aBroadmoorRoadMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Initial cost to Company 2,636irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SwindonUnit1aBroadmoorRoadMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Cost capitalized subsequent to acquisition 1,042us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SwindonUnit1aBroadmoorRoadMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Gross amount carried at close of current period (1) (2) 3,678us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SwindonUnit1aBroadmoorRoadMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Accumulated depreciation at close of current period (1) (2) 860us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SwindonUnit1aBroadmoorRoadMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember
 
Unit 1A Broadmoor Road, Swindom, United Kingdom | Europe | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Amancio Alcorta 2396, Buenos Aires, Argentina | Latin America    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 2us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BuenosAiresAmancioAlcorta2396Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Initial cost to Company 655irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BuenosAiresAmancioAlcorta2396Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Cost capitalized subsequent to acquisition 2,113us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BuenosAiresAmancioAlcorta2396Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Gross amount carried at close of current period (1) (2) 2,768us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BuenosAiresAmancioAlcorta2396Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Accumulated depreciation at close of current period (1) (2) 813us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BuenosAiresAmancioAlcorta2396Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Amancio Alcorta 2396, Buenos Aires, Argentina | Latin America | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Azara 1245, Buenos Aires, Argentina | Latin America    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BuenosAiresAzara1245Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Initial cost to Company 166irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BuenosAiresAzara1245Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Cost capitalized subsequent to acquisition 168us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BuenosAiresAzara1245Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Gross amount carried at close of current period (1) (2) 334us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BuenosAiresAzara1245Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Accumulated depreciation at close of current period (1) (2) 113us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_BuenosAiresAzara1245Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Azara 1245, Buenos Aires, Argentina | Latin America | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Saraza 6135, Buenos Aires, Argentina | Latin America    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Saraza6135BuenosAiresArgentinaMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Initial cost to Company 144irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Saraza6135BuenosAiresArgentinaMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Cost capitalized subsequent to acquisition 272us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Saraza6135BuenosAiresArgentinaMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Gross amount carried at close of current period (1) (2) 416us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Saraza6135BuenosAiresArgentinaMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Accumulated depreciation at close of current period (1) (2) 118us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Saraza6135BuenosAiresArgentinaMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Saraza 6135, Buenos Aires, Argentina | Latin America | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Spegazzini, Ezeiza Buenos Aires, Argentina | Latin America    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SpegazziniEzeizaBuenosAiresArgentinaMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Initial cost to Company 12,773irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SpegazziniEzeizaBuenosAiresArgentinaMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Cost capitalized subsequent to acquisition 5,020us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SpegazziniEzeizaBuenosAiresArgentinaMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Gross amount carried at close of current period (1) (2) 17,793us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SpegazziniEzeizaBuenosAiresArgentinaMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Accumulated depreciation at close of current period (1) (2) 2,483us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_SpegazziniEzeizaBuenosAiresArgentinaMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Spegazzini, Ezeiza Buenos Aires, Argentina | Latin America | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Francisco de Souza e Melo, Rio de Janerio, Brazil | Latin America    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 2us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FranciscoDeSouzaEMeloRioDeJanerioBrazilMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Initial cost to Company 1,868irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FranciscoDeSouzaEMeloRioDeJanerioBrazilMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Cost capitalized subsequent to acquisition 563us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FranciscoDeSouzaEMeloRioDeJanerioBrazilMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Gross amount carried at close of current period (1) (2) 2,431us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FranciscoDeSouzaEMeloRioDeJanerioBrazilMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Accumulated depreciation at close of current period (1) (2) 83us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_FranciscoDeSouzaEMeloRioDeJanerioBrazilMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Francisco de Souza e Melo, Rio de Janerio, Brazil | Latin America | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Hortolandia, Sao Paulo, Brazil | Latin America    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HortolandiaSaoPauloBrazilMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Initial cost to Company 24,078irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HortolandiaSaoPauloBrazilMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Cost capitalized subsequent to acquisition 5,518us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HortolandiaSaoPauloBrazilMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Gross amount carried at close of current period (1) (2) 29,596us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HortolandiaSaoPauloBrazilMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Accumulated depreciation at close of current period (1) (2) 1,160us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_HortolandiaSaoPauloBrazilMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Hortolandia, Sao Paulo, Brazil | Latin America | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
El Taqueral 99, Santiago, Chile | Latin America    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ElTaqueral99SantiagoChileMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Initial cost to Company 2,629irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ElTaqueral99SantiagoChileMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Cost capitalized subsequent to acquisition 35,628us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ElTaqueral99SantiagoChileMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Gross amount carried at close of current period (1) (2) 38,257us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ElTaqueral99SantiagoChileMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Accumulated depreciation at close of current period (1) (2) 7,834us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ElTaqueral99SantiagoChileMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
El Taqueral 99, Santiago, Chile | Latin America | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Panamericana Norte 18900, Santiago, Chile | Latin America    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 4us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PanamericanaNorte18900SantiagoChileMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Initial cost to Company 4,001irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PanamericanaNorte18900SantiagoChileMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Cost capitalized subsequent to acquisition 10,507us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PanamericanaNorte18900SantiagoChileMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Gross amount carried at close of current period (1) (2) 14,508us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PanamericanaNorte18900SantiagoChileMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Accumulated depreciation at close of current period (1) (2) 1,588us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PanamericanaNorte18900SantiagoChileMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Panamericana Norte 18900, Santiago, Chile | Latin America | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Avenida Prolongacion del Colli 1104, Guadalajara, Mexico | Latin America    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AvenidaProlongacionDelColli1104GuadalajaraMexicoMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Initial cost to Company 374irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AvenidaProlongacionDelColli1104GuadalajaraMexicoMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Cost capitalized subsequent to acquisition 139us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AvenidaProlongacionDelColli1104GuadalajaraMexicoMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Gross amount carried at close of current period (1) (2) 513us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AvenidaProlongacionDelColli1104GuadalajaraMexicoMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Accumulated depreciation at close of current period (1) (2) 79us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AvenidaProlongacionDelColli1104GuadalajaraMexicoMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Avenida Prolongacion del Colli 1104, Guadalajara, Mexico | Latin America | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Privada Las Flores No. 25 (G3), Guadalajara, Mexico | Latin America    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_GuadalajaraPrivadaLasFloresNo.25G3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Initial cost to Company 905irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_GuadalajaraPrivadaLasFloresNo.25G3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Cost capitalized subsequent to acquisition 333us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_GuadalajaraPrivadaLasFloresNo.25G3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Gross amount carried at close of current period (1) (2) 1,238us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_GuadalajaraPrivadaLasFloresNo.25G3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Accumulated depreciation at close of current period (1) (2) 194us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_GuadalajaraPrivadaLasFloresNo.25G3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Privada Las Flores No. 25 (G3), Guadalajara, Mexico | Latin America | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Carretera Pesqueria Km2.5(M3), Monterrey, Mexico | Latin America    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 2us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MonterreyCarreteraPesqueriaKm2.5M3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Initial cost to Company 3,537irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MonterreyCarreteraPesqueriaKm2.5M3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Cost capitalized subsequent to acquisition 1,085us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MonterreyCarreteraPesqueriaKm2.5M3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Gross amount carried at close of current period (1) (2) 4,622us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MonterreyCarreteraPesqueriaKm2.5M3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Accumulated depreciation at close of current period (1) (2) 831us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_MonterreyCarreteraPesqueriaKm2.5M3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Carretera Pesqueria Km2.5(M3), Monterrey, Mexico | Latin America | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Lote 2, Manzana A, (T2& T3), Toluca, Mexico | Latin America    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TolucaLote2ManzanaT2T3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Initial cost to Company 2,204irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TolucaLote2ManzanaT2T3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Cost capitalized subsequent to acquisition 707us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TolucaLote2ManzanaT2T3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Gross amount carried at close of current period (1) (2) 2,911us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TolucaLote2ManzanaT2T3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Accumulated depreciation at close of current period (1) (2) 507us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TolucaLote2ManzanaT2T3Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Lote 2, Manzana A, (T2& T3), Toluca, Mexico | Latin America | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Prolongacion de la Calle 7 (T4), Toluca, Mexico | Latin America    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TolucaProlongacionDeLaCalle7T4Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Initial cost to Company 7,544irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TolucaProlongacionDeLaCalle7T4Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Cost capitalized subsequent to acquisition 2,580us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TolucaProlongacionDeLaCalle7T4Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Gross amount carried at close of current period (1) (2) 10,124us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TolucaProlongacionDeLaCalle7T4Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Accumulated depreciation at close of current period (1) (2) 1,692us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_TolucaProlongacionDeLaCalle7T4Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Prolongacion de la Calle 7 (T4), Toluca, Mexico | Latin America | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Panamericana Sur, KM 57.5, Lima, Peru | Latin America    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 5us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PanamericanaSurKm57.5LimaPeruMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Encumbrances 2,589us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PanamericanaSurKm57.5LimaPeruMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Initial cost to Company 1,549irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PanamericanaSurKm57.5LimaPeruMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Cost capitalized subsequent to acquisition 947us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PanamericanaSurKm57.5LimaPeruMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Gross amount carried at close of current period (1) (2) 2,496us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PanamericanaSurKm57.5LimaPeruMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Accumulated depreciation at close of current period (1) (2) 402us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_PanamericanaSurKm57.5LimaPeruMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Panamericana Sur, KM 57.5, Lima, Peru | Latin America | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Av. Elmer Faucett 3462, Lima, Peru | Latin America    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 2us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Av.ElmerFaucett3462LimaPeruMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Initial cost to Company 4,112irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Av.ElmerFaucett3462LimaPeruMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Cost capitalized subsequent to acquisition 2,296us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Av.ElmerFaucett3462LimaPeruMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Gross amount carried at close of current period (1) (2) 6,408us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Av.ElmerFaucett3462LimaPeruMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Accumulated depreciation at close of current period (1) (2) 1,212us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_Av.ElmerFaucett3462LimaPeruMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Av. Elmer Faucett 3462, Lima, Peru | Latin America | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Calle Los Claveles-Seccion 3, Lima, Peru | Latin America    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CalleLosClavelesSeccion3LimaPeruMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Initial cost to Company 8,179irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CalleLosClavelesSeccion3LimaPeruMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Cost capitalized subsequent to acquisition 3,614us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CalleLosClavelesSeccion3LimaPeruMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Gross amount carried at close of current period (1) (2) 11,793us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CalleLosClavelesSeccion3LimaPeruMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Accumulated depreciation at close of current period (1) (2) 3,048us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_CalleLosClavelesSeccion3LimaPeruMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_LatinAmericaMember
 
Calle Los Claveles-Seccion 3, Lima, Peru | Latin America | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
8 Whitestone Drive, Austins Ferry, Australia | Asia Pacific    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AustinsFerry8WhitestoneDriveMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember
 
Initial cost to Company 681irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AustinsFerry8WhitestoneDriveMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember
 
Cost capitalized subsequent to acquisition 3,438us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AustinsFerry8WhitestoneDriveMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember
 
Gross amount carried at close of current period (1) (2) 4,119us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AustinsFerry8WhitestoneDriveMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember
 
Accumulated depreciation at close of current period (1) (2) 619us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_AustinsFerry8WhitestoneDriveMember
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember
 
8 Whitestone Drive, Austins Ferry, Australia | Asia Pacific | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years  
Warehouse No 4, Shanghai, China | Asia Pacific    
REAL ESTATE AND RELATED DEPRECIATION    
Facilities (1) 1us-gaap_SECScheduleIIIRealEstateNumberOfUnits
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ShanghaiWarehouseNo4Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember
 
Initial cost to Company 1,530irm_RealEstateAndAccumulatedDepreciationInitialCostTotal
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ShanghaiWarehouseNo4Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember
 
Cost capitalized subsequent to acquisition 1,030us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ShanghaiWarehouseNo4Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember
 
Gross amount carried at close of current period (1) (2) 2,560us-gaap_RealEstateGrossAtCarryingValue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ShanghaiWarehouseNo4Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember
 
Accumulated depreciation at close of current period (1) (2) $ 92us-gaap_RealEstateAccumulatedDepreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= irm_ShanghaiWarehouseNo4Member
/ us-gaap_StatementGeographicalAxis
= us-gaap_AsiaPacificMember
 
Warehouse No 4, Shanghai, China | Asia Pacific | Maximum    
REAL ESTATE AND RELATED DEPRECIATION    
Life on which depreciation in latest income statement is computed 40 years