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Real Estate and Other Activities - Summary of Operating Results from Properties Sold (Parenthetical) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Business Acquisition [Line Items]    
Net impairment charge $ 79.0  
Disposal Group, Not Discontinued Operations [Member]    
Business Acquisition [Line Items]    
Straight-line rent write-offs   $ 4.5
Massachusetts-based General Acute Care Hospitals [Member]    
Business Acquisition [Line Items]    
Straight-line rent write-offs   125.0
Massachusetts-based General Acute Care Hospitals [Member] | Disposal Group, Not Discontinued Operations [Member]    
Business Acquisition [Line Items]    
Gains   $ 451.6
Australia Transaction [Member]    
Business Acquisition [Line Items]    
Straight-line rent write-offs 37.4  
Net impairment charge 79.0  
Prime [Member]    
Business Acquisition [Line Items]    
Non-cash impairment charge $ 11.0