v3.25.2
Investments (Credit Losses Recognized In Earnings on Fixed Maturity Securities Held by the Company) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]        
Balance, beginning of period $ 251 $ 171 $ 331 $ 160
Additions to allowance for credit losses not previously recorded 1 13 18 59
Reductions for securities sold during the period (6) (38) (12) (50)
Additions (reductions) on securities with previous allowance 28 23 31 0
Write-downs charged against the allowance (50)   (144)  
Balance, ending of period 224 169 224 169
U.S. Treasury securities and obligations of U.S. government authorities and agencies        
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]        
Balance, beginning of period 0 0 0 0
Additions to allowance for credit losses not previously recorded 0 0 0 0
Reductions for securities sold during the period 0 0 0 0
Additions (reductions) on securities with previous allowance 0 0 0 0
Write-downs charged against the allowance 0   0  
Balance, ending of period 0 0 0 0
Foreign government securities        
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]        
Balance, beginning of period 0 31 0 53
Additions to allowance for credit losses not previously recorded 0 0 0 0
Reductions for securities sold during the period 0 (30) 0 (30)
Additions (reductions) on securities with previous allowance 0 (1) 0 (23)
Write-downs charged against the allowance 0   0  
Balance, ending of period 0 0 0 0
U.S. and Foreign Corporate Securities        
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]        
Balance, beginning of period 250 139 331 105
Additions to allowance for credit losses not previously recorded 1 13 17 59
Reductions for securities sold during the period (6) (8) (12) (20)
Additions (reductions) on securities with previous allowance 28 24 31 24
Write-downs charged against the allowance (50)   (144)  
Balance, ending of period 223 168 223 168
Asset-backed securities        
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]        
Balance, beginning of period 1 1 0 2
Additions to allowance for credit losses not previously recorded 0 0 1 0
Reductions for securities sold during the period 0 0 0 0
Additions (reductions) on securities with previous allowance 0 0 0 (1)
Write-downs charged against the allowance 0   0  
Balance, ending of period 1 1 1 1
Commercial mortgage-backed securities        
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]        
Balance, beginning of period 0 0 0 0
Additions to allowance for credit losses not previously recorded 0 0 0 0
Reductions for securities sold during the period 0 0 0 0
Additions (reductions) on securities with previous allowance 0 0 0 0
Write-downs charged against the allowance 0   0  
Balance, ending of period 0 0 0 0
Residential mortgage-backed securities        
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]        
Balance, beginning of period 0 0 0 0
Additions to allowance for credit losses not previously recorded 0 0 0 0
Reductions for securities sold during the period 0 0 0 0
Additions (reductions) on securities with previous allowance 0 0 0 0
Write-downs charged against the allowance 0   0  
Balance, ending of period $ 0 $ 0 $ 0 $ 0