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Investments - Narrative (Details)
$ in Millions
12 Months Ended
Dec. 31, 2025
USD ($)
security
Dec. 31, 2024
USD ($)
Schedule of Investments [Line Items]    
Unfunded commitments to limited partnerships $ 456 $ 457
Percentage (based on unrealized loss) of available for sale fixed maturities that are in unrealized loss position and rated investment grade 96.00%  
Percentage (based on fair value) of available for sale fixed maturities that are in unrealized loss position and rated investment grade 96.00%  
Fixed maturities    
Schedule of Investments [Line Items]    
Gross unrealized losses on available for sale fixed maturities $ (193) $ (353)
Number of fixed maturities in an unrealized loss position | security 850  
Multi-family    
Schedule of Investments [Line Items]    
Percent of real estate-related investments by property type 87.00% 88.00%