v3.26.1
Reinsurance (Narrative) (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Ceded Credit Risk [Line Items]    
Claims Recoverable From Retrocessionaires Past Due $ 5 $ 6
Embedded Derivative, Fair Value of Embedded Derivative Asset 136 58
Funds Held under Reinsurance Agreements, Liability $ 6,394 $ 6,805
AM Best, B++ Rating    
Ceded Credit Risk [Line Items]    
Ceded Credit Risk, Disclosure “B++ (Good)”