XML 56 R41.htm IDEA: XBRL DOCUMENT v3.19.1
Real Estate Transactions - 2019 Real Estate Investments (Details)
$ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
May 01, 2019
USD ($)
property
Apr. 30, 2019
USD ($)
property
Mar. 31, 2019
USD ($)
facility
Dec. 31, 2018
USD ($)
facility
Sep. 30, 2018
USD ($)
facility
Jun. 30, 2018
USD ($)
facility
Mar. 31, 2018
USD ($)
Dec. 31, 2018
property
Real Estate [Line Items]                
Payments to acquire real estate             $ 21  
Life science                
Real Estate [Line Items]                
Number of properties disposed (in facilities) | facility         4      
Proceeds from Sale of Real Estate         $ 269      
Life science | Life science facility                
Real Estate [Line Items]                
Payments to acquire real estate     $ 71          
Life science | Land                
Real Estate [Line Items]                
Number of properties disposed (in facilities) | facility     1 1        
Proceeds from Sale of Real Estate     $ 35 $ 3        
Payments to acquire real estate     $ 27          
Senior housing triple-net                
Real Estate [Line Items]                
Number of properties disposed (in facilities) | facility     2     2    
Proceeds from Sale of Real Estate     $ 26     $ 35    
Subsequent Event | Senior Housing | Senior Housing                
Real Estate [Line Items]                
Payments to acquire real estate $ 113 $ 445            
Number of properties acquired (in properties) | property 3 9            
Assets Leased to Others                
Real Estate [Line Items]                
Number of assets transitioned | property               37
Assets Leased to Others | Senior housing triple-net                
Real Estate [Line Items]                
Number of assets transitioned | property 4             17