v3.25.4
Investments - Schedule of Available-for-Sale Securities Whose Value is Below Amortized Cost (Details)
$ in Millions
Dec. 31, 2025
USD ($)
security
Dec. 31, 2024
USD ($)
security
Fair Value    
Nine months or greater, but less than twelve months $ 13,038 $ 21,106
Twelve months or greater 36,491 35,528
Total 49,529 56,634
Gross Unrealized Losses    
Nine months or greater, but less than twelve months 1,325 1,524
Twelve months or greater 4,939 6,262
Total $ 6,264 $ 7,786
Number of Securities    
Total | security 5,738 6,645
Fair Value Decline, Greater Than 20%    
Fair Value    
Less than six months $ 2,318 $ 5,209
Six months or greater, but less than nine months 337 365
Nine months or greater, but less than twelve months 302 71
Twelve months or greater 4,985 4,305
Total 7,942 9,950
Gross Unrealized Losses    
Less than six months 829 1,556
Six months or greater, but less than nine months 159 195
Nine months or greater, but less than twelve months 119 28
Twelve months or greater 2,089 2,142
Total $ 3,196 $ 3,921
Number of Securities    
Less than six months | security 441 780
Six months or greater, but less than nine months | security 60 209
Nine months or greater, but less than twelve months | security 99 36
Twelve months or greater | security 889 734
Total | security 1,489 1,759