v3.26.1
Investment Information - Maturity profile of available for sale securities) (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Estimated Fair Value    
Due in one year or less $ 692 $ 370
Due after one year through five years 16,827 17,053
Due after five years through 10 years 7,231 6,893
Due after 10 years 536 619
Single maturity date 25,286 24,935
Estimated Fair Value 36,453 35,051
Amortized Cost    
Due in one year or less 693 366
Due after one year through five years 16,940 16,989
Due after five years through 10 years 7,315 6,877
Due after 10 years 552 621
Single maturity date 25,500 24,853
Cost or Amortized Cost 36,725 34,953
Fixed maturities    
Estimated Fair Value    
Estimated Fair Value 33,155 32,426
Amortized Cost    
Cost or Amortized Cost 33,427 32,329
Residential mortgage backed securities    
Estimated Fair Value    
Securities without single maturity date 2,643 2,705
Estimated Fair Value 2,643 2,705
Amortized Cost    
Securities without single maturity date 2,670 2,692
Cost or Amortized Cost 2,670 2,692
Commercial mortgage backed securities    
Estimated Fair Value    
Securities without single maturity date 1,549 1,212
Estimated Fair Value 1,549 1,212
Amortized Cost    
Securities without single maturity date 1,551 1,207
Cost or Amortized Cost 1,551 1,207
Asset backed securities    
Estimated Fair Value    
Securities without single maturity date 3,677 3,574
Estimated Fair Value 3,677 3,574
Amortized Cost    
Securities without single maturity date 3,706 3,577
Cost or Amortized Cost $ 3,706 $ 3,577