v3.26.3
Investments - Schedule of Rollforward of Debt Securities Allowance for Credit Loss (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]        
Beginning Balance $ 24 $ 12 $ 11 $ 39
Additions for which credit loss was not previously recorded 10 0 16 1
Changes for securities with previously recorded credit loss 19 12 53 40
Additions for purchases of PCD debt securities 0 0 0 0
Reductions from charge-offs (43) (12) (61) (65)
Reductions for securities disposed (6) (1) (15) (3)
Securities intended/required to be sold before recovery of amortized cost basis 0 0 0 (1)
Ending Balance 4 11 4 11
Accrued interest receivable on debt securities $ 589 $ 493 $ 589 $ 493
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Accrued investment income Accrued investment income Accrued investment income Accrued investment income
U.S. government securities        
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]        
Beginning Balance $ 0 $ 0 $ 0 $ 0
Additions for which credit loss was not previously recorded 0 0 0 0
Changes for securities with previously recorded credit loss 0 0 0 0
Additions for purchases of PCD debt securities 0 0 0 0
Reductions from charge-offs 0 0 0 0
Reductions for securities disposed 0 0 0 0
Securities intended/required to be sold before recovery of amortized cost basis 0 0 0 0
Ending Balance 0 0 0 0
Other government securities        
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]        
Beginning Balance 0 0 0 0
Additions for which credit loss was not previously recorded 0 0 0 0
Changes for securities with previously recorded credit loss 0 0 0 0
Additions for purchases of PCD debt securities 0 0 0 0
Reductions from charge-offs 0 0 0 0
Reductions for securities disposed 0 0 0 0
Securities intended/required to be sold before recovery of amortized cost basis 0 0 0 0
Ending Balance 0 0 0 0
Public utilities        
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]        
Beginning Balance 0 0 0 0
Additions for which credit loss was not previously recorded 0 0 0 0
Changes for securities with previously recorded credit loss 0 0 0 0
Additions for purchases of PCD debt securities 0 0 0 0
Reductions from charge-offs 0 0 0 0
Reductions for securities disposed 0 0 0 0
Securities intended/required to be sold before recovery of amortized cost basis 0 0 0 0
Ending Balance 0 0 0 0
Corporate securities        
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]        
Beginning Balance 5 8 0 8
Additions for which credit loss was not previously recorded 7 0 13 0
Changes for securities with previously recorded credit loss 1 0 0 0
Additions for purchases of PCD debt securities 0 0 0 0
Reductions from charge-offs (7) 0 (7) 0
Reductions for securities disposed (6) 0 (6) 0
Securities intended/required to be sold before recovery of amortized cost basis 0 0 0 0
Ending Balance 0 8 0 8
Residential mortgage-backed        
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]        
Beginning Balance 1 4 4 6
Additions for which credit loss was not previously recorded 0 0 0 0
Changes for securities with previously recorded credit loss 0 0 (1) 0
Additions for purchases of PCD debt securities 0 0 0 0
Reductions from charge-offs 0 0 0 0
Reductions for securities disposed 0 (1) (2) (3)
Securities intended/required to be sold before recovery of amortized cost basis 0 0 0 0
Ending Balance 1 3 1 3
Commercial mortgage-backed        
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]        
Beginning Balance 0 0 0 0
Additions for which credit loss was not previously recorded 1 0 1 1
Changes for securities with previously recorded credit loss 0 0 0 0
Additions for purchases of PCD debt securities 0 0 0 0
Reductions from charge-offs 0 0 0 0
Reductions for securities disposed 0 0 0 0
Securities intended/required to be sold before recovery of amortized cost basis 0 0 0 (1)
Ending Balance 1 0 1 0
Other asset-backed securities        
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]        
Beginning Balance 18 0 7 25
Additions for which credit loss was not previously recorded 2 0 2 0
Changes for securities with previously recorded credit loss 18 12 54 40
Additions for purchases of PCD debt securities 0 0 0 0
Reductions from charge-offs (36) (12) (54) (65)
Reductions for securities disposed 0 0 (7) 0
Securities intended/required to be sold before recovery of amortized cost basis 0 0 0 0
Ending Balance $ 2 $ 0 $ 2 $ 0