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Business (Details)
Mar. 31, 2015
Number
properties
Business [Line Items]  
Number of properties in diversified portfolio 1,316us-gaap_NumberOfRealEstateProperties [1]
Number of states in diversified portfolio 46us-gaap_NumberOfStatesInWhichEntityOperates
Controlling [Member]  
Business [Line Items]  
Number of properties in diversified portfolio 1,384us-gaap_NumberOfRealEstateProperties
/ hcn_OwnershipInterestAxis
= hcn_ControllingMember
[1]
(1)     Genesis Healthcare is in our triple-net segment. Sunrise Senior Living and Revera are in our seniors housing operating segment. Brookdale Senior Living and Benchmark Senior Living are in both our triple-net and seniors housing operating segments.