v3.26.1
Investments - Schedule of Rollforward of Debt Securities Allowance for Credit Loss (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]    
Beginning Balance $ 11 $ 39
Additions for which credit loss was not previously recorded 6 1
Changes for securities with previously recorded credit loss 27 1
Additions for purchases of PCD debt securities 0 0
Reductions from charge-offs (18) 0
Reductions for securities disposed (9) 0
Securities intended/required to be sold before recovery of amortized cost basis 0 (1)
Ending Balance 17 40
Accrued interest receivable on debt securities $ 519 $ 448
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Accrued investment income Accrued investment income
U.S. government securities    
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]    
Beginning Balance $ 0 $ 0
Additions for which credit loss was not previously recorded 0 0
Changes for securities with previously recorded credit loss 0 0
Additions for purchases of PCD debt securities 0 0
Reductions from charge-offs 0 0
Reductions for securities disposed 0 0
Securities intended/required to be sold before recovery of amortized cost basis 0 0
Ending Balance 0 0
Other government securities    
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]    
Beginning Balance 0 0
Additions for which credit loss was not previously recorded 0 0
Changes for securities with previously recorded credit loss 0 0
Additions for purchases of PCD debt securities 0 0
Reductions from charge-offs 0 0
Reductions for securities disposed 0 0
Securities intended/required to be sold before recovery of amortized cost basis 0 0
Ending Balance 0 0
Public utilities    
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]    
Beginning Balance 0 0
Additions for which credit loss was not previously recorded 0 0
Changes for securities with previously recorded credit loss 0 0
Additions for purchases of PCD debt securities 0 0
Reductions from charge-offs 0 0
Reductions for securities disposed 0 0
Securities intended/required to be sold before recovery of amortized cost basis 0 0
Ending Balance 0 0
Corporate securities    
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]    
Beginning Balance 0 8
Additions for which credit loss was not previously recorded 6 0
Changes for securities with previously recorded credit loss 0 0
Additions for purchases of PCD debt securities 0 0
Reductions from charge-offs 0 0
Reductions for securities disposed 0 0
Securities intended/required to be sold before recovery of amortized cost basis 0 0
Ending Balance 6 8
Residential mortgage-backed    
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]    
Beginning Balance 4 6
Additions for which credit loss was not previously recorded 0 0
Changes for securities with previously recorded credit loss (1) 0
Additions for purchases of PCD debt securities 0 0
Reductions from charge-offs 0 0
Reductions for securities disposed (2) 0
Securities intended/required to be sold before recovery of amortized cost basis 0 0
Ending Balance 1 6
Commercial mortgage-backed    
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]    
Beginning Balance 0 0
Additions for which credit loss was not previously recorded 0 1
Changes for securities with previously recorded credit loss 0 0
Additions for purchases of PCD debt securities 0 0
Reductions from charge-offs 0 0
Reductions for securities disposed 0 0
Securities intended/required to be sold before recovery of amortized cost basis 0 (1)
Ending Balance 0 0
Other asset-backed securities    
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]    
Beginning Balance 7 25
Additions for which credit loss was not previously recorded 0 0
Changes for securities with previously recorded credit loss 28 1
Additions for purchases of PCD debt securities 0 0
Reductions from charge-offs (18) 0
Reductions for securities disposed (7) 0
Securities intended/required to be sold before recovery of amortized cost basis 0 0
Ending Balance $ 10 $ 26