v3.26.1
Derivatives (Embedded Derivatives) (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Derivatives, Fair Value [Line Items]    
Total $ 152 $ (57)
Funds withheld and guarantees on reinsurance | us-gaap_OtherLiabilitiesNonCurrent    
Derivatives, Fair Value [Line Items]    
Total (292) (10)
Fixed annuities with equity indexed returns [Member] | Policyholder account balances    
Derivatives, Fair Value [Line Items]    
Total (140) (67)
Funds withheld on ceded reinsurance Chariot Re.    
Derivatives, Fair Value [Line Items]    
Total $ (84) $ 81