v3.26.1
Variable Interest Entities - Additional Information (Details)
 6 Months Ended
Jun. 30, 2026
USD ($)
policy
Entity
Dec. 31, 2025
USD ($)
policy
Entity
Jun. 30, 2025
USD ($)
Variable Interest Entity [Line Items]      
Assets $ 12,641,000,000 $ 12,176,000,000  
Fixed-maturity securities, available for sale 6,817,000,000 6,369,000,000  
Other assets (includes $187 and $174, at fair value) 755,000,000 701,000,000  
Cash $ 310,000,000 $ 388,000,000 $ 301,000,000
Number of policies monitored | policy 16,000    
Number of policies monitored, not within the scope of ASC 810 | policy 15,000    
Number of policies that contain provisions for consolidation | policy 53 53  
Net fair value gains and losses on FG VIEs are expected to reverse to zero at maturity of the VIE debt $ 827,000,000    
Financial Guaranty Variable Interest Entities | Variable Interest Entity, Primary Beneficiary      
Variable Interest Entity [Line Items]      
Number of entities | Entity 23 24  
Maximum loss exposure $ 0    
Assets 198,000,000 $ 212,000,000  
Assets of CIVs | Sound Point Agreement      
Variable Interest Entity [Line Items]      
Gain on deconsolidation $ 2,000,000    
Assets of CIVs | Variable Interest Entity, Primary Beneficiary      
Variable Interest Entity [Line Items]      
Total number of entities consolidated | Entity 0 1  
Assets   $ 175,000,000  
Pension Risk Transfers Variable Interest Entities | Variable Interest Entity, Primary Beneficiary      
Variable Interest Entity [Line Items]      
Fixed-maturity securities, available for sale $ 583,000,000    
Short-term investments, at fair value 3,000,000    
Other assets (includes $187 and $174, at fair value) 9,000,000    
Credit derivative liabilities, net 6,000,000    
Cash $ 7,000,000