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Real Estate and Other Activities - 2021 Activity - Additional Information (Detail)
£ in Millions, $ in Millions
Jun. 25, 2021
GBP (£)
Property
Jan. 19, 2021
GBP (£)
Jan. 08, 2021
USD ($)
Mar. 14, 2022
Business Acquisition [Line Items]        
Ownership interest       50.00%
Waterland Private Equity Fund VII C.V. [Member]        
Business Acquisition [Line Items]        
Number of real estate assets acquired | Property 35      
Payment for acquisition £ 800      
Purchase price of acquisition loan   £ 250    
Ownership interest   9.90%    
Waterland Private Equity Fund VII C.V. [Member] | United Kingdom [Member]        
Business Acquisition [Line Items]        
Purchase price of acquisition   £ 800    
Steward Health Care System LLC [Member]        
Business Acquisition [Line Items]        
Ownership interest     9.90%  
Percentage of interest rate with possible outside returns     4.00%  
Other loan to affiliates | $     $ 335  
Initial term of loan     7 years