v3.26.1
Investments - Schedule of Fair Value and Gross Unrealized Losses of Available-for-Sale Securities (Details)
$ in Millions
Jun. 30, 2026
USD ($)
security
Dec. 31, 2025
USD ($)
security
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]    
Fair Value, Less than 12 months $ 15,400 $ 9,600
Gross Unrealized Losses Less than 12 months (294) (103)
Fair Value, 12 months or longer 13,735 15,352
Gross Unrealized Losses, 12 months or longer (2,961) (2,966)
Total Fair Value 29,135 24,952
Total Gross Unrealized Losses $ (3,255) $ (3,069)
Total number of available-for-sale securities in an unrealized loss position less than twelve months | security 3,758 1,962
Total number of available-for-sale securities in an unrealized loss position twelve months or longer | security 2,050 2,194
Total number of available-for-sale securities in an unrealized loss position | security 5,808 4,156
Asset-backed securities    
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]    
Fair Value, Less than 12 months $ 5,161 $ 4,756
Gross Unrealized Losses Less than 12 months (117) (30)
Fair Value, 12 months or longer 1,950 2,160
Gross Unrealized Losses, 12 months or longer (223) (209)
Total Fair Value 7,111 6,916
Total Gross Unrealized Losses (340) (239)
Commercial mortgage-backed securities    
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]    
Fair Value, Less than 12 months 906 542
Gross Unrealized Losses Less than 12 months (10) (11)
Fair Value, 12 months or longer 917 1,051
Gross Unrealized Losses, 12 months or longer (115) (106)
Total Fair Value 1,823 1,593
Total Gross Unrealized Losses (125) (117)
Corporates    
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]    
Fair Value, Less than 12 months 6,871 3,419
Gross Unrealized Losses Less than 12 months (143) (55)
Fair Value, 12 months or longer 8,990 10,097
Gross Unrealized Losses, 12 months or longer (2,286) (2,312)
Total Fair Value 15,861 13,516
Total Gross Unrealized Losses (2,429) (2,367)
Hybrids    
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]    
Fair Value, Less than 12 months 133 61
Gross Unrealized Losses Less than 12 months (3) (1)
Fair Value, 12 months or longer 286 372
Gross Unrealized Losses, 12 months or longer (20) (21)
Total Fair Value 419 433
Total Gross Unrealized Losses (23) (22)
Municipals    
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]    
Fair Value, Less than 12 months 221 201
Gross Unrealized Losses Less than 12 months (5) (3)
Fair Value, 12 months or longer 1,020 1,050
Gross Unrealized Losses, 12 months or longer (212) (212)
Total Fair Value 1,241 1,251
Total Gross Unrealized Losses (217) (215)
Residential mortgage-backed securities    
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]    
Fair Value, Less than 12 months 1,510 208
Gross Unrealized Losses Less than 12 months (7) (2)
Fair Value, 12 months or longer 346 390
Gross Unrealized Losses, 12 months or longer (63) (67)
Total Fair Value 1,856 598
Total Gross Unrealized Losses (70) (69)
U.S. Government    
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]    
Fair Value, Less than 12 months 428 353
Gross Unrealized Losses Less than 12 months (5) (1)
Fair Value, 12 months or longer 82 84
Gross Unrealized Losses, 12 months or longer (1) (2)
Total Fair Value 510 437
Total Gross Unrealized Losses (6) (3)
Foreign Governments    
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]    
Fair Value, Less than 12 months 170 60
Gross Unrealized Losses Less than 12 months (4) 0
Fair Value, 12 months or longer 144 148
Gross Unrealized Losses, 12 months or longer (41) (37)
Total Fair Value 314 208
Total Gross Unrealized Losses $ (45) $ (37)