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DESCRIPTION OF BUSINESS (Details)
Mar. 31, 2015
property
Real estate properties  
Number of real estate properties 1,600us-gaap_NumberOfRealEstateProperties
Number of properties leased 952vtr_NumberOfPropertiesLeasedUnderTripleNetLeases
Development Projects  
Real estate properties  
Number of real estate properties 1us-gaap_NumberOfRealEstateProperties
/ us-gaap_RealEstatePropertiesAxis
= vtr_DevelopmentProjectsMember
Seniors Housing Communities  
Real estate properties  
Number of independent third party managed properties 305vtr_NumberOfIndependentThirdPartyManagedProperties
/ us-gaap_RealEstatePropertiesAxis
= vtr_SeniorHousingCommunitiesMember
Brookdale Senior Living  
Real estate properties  
Number of properties leased 145vtr_NumberOfPropertiesLeasedUnderTripleNetLeases
/ vtr_PropertySubjectToOperatingLeaseByLessorAxis
= vtr_BrookdaleSeniorLivingMember
Number of properties included in investments in unconsolidated entities (6)vtr_NumberOfPropertiesIncludedInInvestmentsInUnconsolidatedEntities
/ vtr_PropertySubjectToOperatingLeaseByLessorAxis
= vtr_BrookdaleSeniorLivingMember
Kindred  
Real estate properties  
Number of properties leased 83vtr_NumberOfPropertiesLeasedUnderTripleNetLeases
/ vtr_PropertySubjectToOperatingLeaseByLessorAxis
= vtr_KindredMember