v3.26.3
Lending Activities - Loan modifications (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Commercial Mortgages    
Composition of Mortgages and other loans receivable    
Financing receivable, modified loans to percent of two portfolio segments (as a percent) 1.00% 1.00%
Financing receivable, modified, weighted average life in loans 1 year 1 year
Commercial loans, other loans and notes receivable    
Composition of Mortgages and other loans receivable    
Financing receivable, modified loans to percent of two portfolio segments (as a percent) 1.00% 1.00%
Financing receivable, modified, weighted average life in loans 1 year 1 year
Commercial Mortgage Loans | Extended Maturity and Interest Rate Term Changes    
Composition of Mortgages and other loans receivable    
Amortized cost of commercial mortgage loans $ 470  
Commercial Mortgage Loans | Extended Maturity and Interest Rate Term Changes | Fortitude RE    
Composition of Mortgages and other loans receivable    
Amortized cost of commercial mortgage loans 11  
Commercial Mortgage Loans | Extended Maturity    
Composition of Mortgages and other loans receivable    
Amortized cost of commercial mortgage loans   $ 150
Delinquent loans which were previously extended 28  
Commercial loans, other loans and notes receivable | Extended Maturity and Interest Rate Term Changes    
Composition of Mortgages and other loans receivable    
Amortized cost of commercial mortgage loans 21  
Commercial loans, other loans and notes receivable | Extended Maturity    
Composition of Mortgages and other loans receivable    
Amortized cost of commercial mortgage loans   $ 10
Delinquent loans which were previously extended $ 10