v3.26.1
Fair Value Measurements - Fair Value Option (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Fair Value, Option, Quantitative Disclosures [Line Items]          
Fixed maturities, at fair value using the fair value option ("FVO Securities") $ 125   $ 125   $ 168
Changes in fair value of assets using fair value option 3 $ 13 37 $ 17  
Collateralized Loan Obligations [Member]          
Fair Value, Option, Quantitative Disclosures [Line Items]          
Fixed maturities, at fair value using the fair value option ("FVO Securities") $ 125   $ 125   $ 168