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Variable Interest Entities (Details)
$ in Millions
Sep. 30, 2015
USD ($)
CCRC Venture opco [Member]  
Variable Interest Entity [Line Items]  
Maximum Exposure to Loss $ 181.3
Carrying Amount $ 181.3
Percentage ownership in unconsolidated joint ventures 51.00%
HCP 49 Venture opco and propco [Member]  
Variable Interest Entity [Line Items]  
Maximum Exposure to Loss $ 71.5
Carrying Amount $ 71.5
Percentage ownership in unconsolidated joint ventures 20.00%
Other Ventures [Member]  
Variable Interest Entity [Line Items]  
Maximum Exposure to Loss $ 5.5
Carrying Amount $ 1.9
Percentage ownership in unconsolidated joint ventures 10.00%