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Schedule IV - Schedule of Mortgage Loans on Real Estate (Parenthetical) (Detail)
12 Months Ended
Dec. 31, 2024
USD ($)
Property
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Mortgage Loans on Real Estate [Line Items]      
Prior Liens $ 0    
Carrying amount of mortgages, federal income tax purposes 293,200,000    
Credit loss reserve 1,500,000,000 $ 10,000,000 $ 114,000,000
Vibra [Member]      
Mortgage Loans on Real Estate [Line Items]      
Credit loss reserve 100,000    
Prospect [Member]      
Mortgage Loans on Real Estate [Line Items]      
Reserves/writedowns $ 155,000,000    
Prospect [Member] | Long-Term First Mortgage Loan [Member]      
Mortgage Loans on Real Estate [Line Items]      
Number of properties | Property 4    
Colombia [Member]      
Mortgage Loans on Real Estate [Line Items]      
Reserves/writedowns $ 18,000,000    
Colombia [Member] | Long-Term First Mortgage Loan [Member]      
Mortgage Loans on Real Estate [Line Items]      
Number of properties | Property 3