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Equity And Accumulated Other Comprehensive Loss, Net (Ownership Interest In The Operating Partnership) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]    
Partners' capital account units 135,626,255us-gaap_PartnersCapitalAccountUnits 128,455,350us-gaap_PartnersCapitalAccountUnits
Percentage of total 97.80%dlr_PercentageOfTotalUnits 97.70%dlr_PercentageOfTotalUnits
Redeemable Noncontrolling Interest, Equity, Carrying Amount $ 179.0us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount $ 124.1us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount
Common units held by third parties    
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]    
Common units held by third parties 1,463,814dlr_PartnersCapitalAccountUnitsHeldByThirdParty
/ us-gaap_StatementEquityComponentsAxis
= dlr_CommonUnitsHeldByThirdPartiesMember
1,491,814dlr_PartnersCapitalAccountUnitsHeldByThirdParty
/ us-gaap_StatementEquityComponentsAxis
= dlr_CommonUnitsHeldByThirdPartiesMember
Percentage of total 1.10%dlr_PercentageOfTotalUnits
/ us-gaap_StatementEquityComponentsAxis
= dlr_CommonUnitsHeldByThirdPartiesMember
1.20%dlr_PercentageOfTotalUnits
/ us-gaap_StatementEquityComponentsAxis
= dlr_CommonUnitsHeldByThirdPartiesMember
Incentive Units Held By Employees And Directors    
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]    
Incentive units held by employees and directors 1,549,847dlr_PartnerscapitalAccountUnitsHeldByEmployeesAndDirectors
/ us-gaap_StatementEquityComponentsAxis
= dlr_IncentiveUnitsHeldByEmployeesAndDirectorsMember
1,475,207dlr_PartnerscapitalAccountUnitsHeldByEmployeesAndDirectors
/ us-gaap_StatementEquityComponentsAxis
= dlr_IncentiveUnitsHeldByEmployeesAndDirectorsMember
Percentage of total 1.10%dlr_PercentageOfTotalUnits
/ us-gaap_StatementEquityComponentsAxis
= dlr_IncentiveUnitsHeldByEmployeesAndDirectorsMember
1.10%dlr_PercentageOfTotalUnits
/ us-gaap_StatementEquityComponentsAxis
= dlr_IncentiveUnitsHeldByEmployeesAndDirectorsMember
Noncontrolling Interests in Operating Partnership    
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]    
Partners' capital account units 138,639,916us-gaap_PartnersCapitalAccountUnits
/ us-gaap_StatementEquityComponentsAxis
= dlr_NoncontrollingInterestsInOperatingPartnershipMember
131,422,371us-gaap_PartnersCapitalAccountUnits
/ us-gaap_StatementEquityComponentsAxis
= dlr_NoncontrollingInterestsInOperatingPartnershipMember
Percentage of total 100.00%dlr_PercentageOfTotalUnits
/ us-gaap_StatementEquityComponentsAxis
= dlr_NoncontrollingInterestsInOperatingPartnershipMember
100.00%dlr_PercentageOfTotalUnits
/ us-gaap_StatementEquityComponentsAxis
= dlr_NoncontrollingInterestsInOperatingPartnershipMember