v3.26.1
Derivatives (Embedded Derivatives) (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Derivatives, Fair Value [Line Items]    
Total $ (168) $ (57)
Funds withheld and guarantees on reinsurance | StatementOfFinancialPositionLocationBalance [Axis]: us-gaap:OtherLiabilitiesNoncurrent    
Derivatives, Fair Value [Line Items]    
Total (228) (10)
Fixed annuities with equity indexed returns [Member] | StatementOfFinancialPositionLocationBalance [Axis]: us-gaap:PolicyholderFunds    
Derivatives, Fair Value [Line Items]    
Total (396) (67)
Funds withheld on ceded reinsurance Chariot Re.    
Derivatives, Fair Value [Line Items]    
Total $ (78) $ 81