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SUBSEQUENT EVENTS (Details) (USD $)
In Thousands, unless otherwise specified
 1 Months Ended
Apr. 24, 2015
Mar. 31, 2015
property
Subsequent Event [Line Items]    
Number of real estate properties   1,600us-gaap_NumberOfRealEstateProperties
Subsequent Event | SpinCo    
Subsequent Event [Line Items]    
Number of real estate properties 353us-gaap_NumberOfRealEstateProperties
/ dei_LegalEntityAxis
= vtr_SpinCoMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		  
Subsequent Event | Forecast | Ardent Health Services    
Subsequent Event [Line Items]    
Payments to acquire business, cash $ 1,750,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= vtr_ArdentMedicalServicesIncMember
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember		  
Subsequent Event | Forecast | Ardent Health Services | Hospitals    
Subsequent Event [Line Items]    
Business combination, expected parent ownership interest after deconsolidation 9.90%vtr_BusinessCombinationLessthanWhollyOwnedSubsidiaryExpectedParentOwnershipInterestAfterDeconsolidation
/ us-gaap_BusinessAcquisitionAxis
= vtr_ArdentMedicalServicesIncMember
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember
/ us-gaap_SubsegmentsAxis
= vtr_HospitalsMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember