v3.25.1
Investments (Allowance on available-for-sale securities with credit impairments and PCD assets activity) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Allowance for credit losses:    
Balance, beginning of period $ 45 $ 16
Additions to the allowance for credit losses:    
Securities for which credit losses were not previously recorded 0 0
Available-for-sale securities accounted for as PCD assets 0 0
Reductions to the allowance for credit losses:    
Securities sold during the period (realized) 0 0
Intent to sell or more likely than not will be required to sell the security before recovery of its amortized cost basis 0 1
Write-offs charged against the allowance 0 0
Recoveries of amounts previously written off 0 0
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period 2 5
Balance, end of period 47 20
Corporate and other bonds    
Allowance for credit losses:    
Balance, beginning of period 13 4
Additions to the allowance for credit losses:    
Securities for which credit losses were not previously recorded 0 0
Available-for-sale securities accounted for as PCD assets 0 0
Reductions to the allowance for credit losses:    
Securities sold during the period (realized) 0 0
Intent to sell or more likely than not will be required to sell the security before recovery of its amortized cost basis 0 1
Write-offs charged against the allowance 0 0
Recoveries of amounts previously written off 0 0
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period 2 0
Balance, end of period 15 3
Asset-backed    
Allowance for credit losses:    
Balance, beginning of period 32 12
Additions to the allowance for credit losses:    
Securities for which credit losses were not previously recorded 0 0
Available-for-sale securities accounted for as PCD assets 0 0
Reductions to the allowance for credit losses:    
Securities sold during the period (realized) 0 0
Intent to sell or more likely than not will be required to sell the security before recovery of its amortized cost basis 0 0
Write-offs charged against the allowance 0 0
Recoveries of amounts previously written off 0 0
Additional increases or (decreases) to the allowance for credit losses on securities that had an allowance recorded in a previous period 0 5
Balance, end of period $ 32 $ 17