v3.26.1
Investments (Allowance on available-for-sale securities with credit impairments and PCD assets activity) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Allowance for credit losses:    
Balance, beginning of period $ 69 $ 45
Additions to the allowance for credit losses:    
Securities for which credit losses were not previously recorded 3 0
Reductions to the allowance for credit losses:    
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period 3 2
Balance, end of period 75 47
Corporate and other bonds    
Allowance for credit losses:    
Balance, beginning of period 28 13
Additions to the allowance for credit losses:    
Securities for which credit losses were not previously recorded 3 0
Reductions to the allowance for credit losses:    
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period 0 2
Balance, end of period 31 15
Asset-backed    
Allowance for credit losses:    
Balance, beginning of period 41 32
Additions to the allowance for credit losses:    
Securities for which credit losses were not previously recorded 0 0
Reductions to the allowance for credit losses:    
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period 3 0
Balance, end of period $ 44 $ 32