v3.25.3
Investments - Investments by Category (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Schedule of Investments [Line Items]    
Current investments $ 883 $ 665
Long-term investments 18,483 15,128
Total investments 19,366 $ 15,793
Debt securities    
Schedule of Investments [Line Items]    
Current investments 490  
Long-term investments 7,861  
Total investments 8,351  
Equity securities    
Schedule of Investments [Line Items]    
Current investments 17  
Long-term investments 3,500  
Total investments 3,517  
Commercial mortgage loans    
Schedule of Investments [Line Items]    
Current investments 100  
Long-term investments 1,158  
Total investments 1,258  
Policy loans    
Schedule of Investments [Line Items]    
Current investments 0  
Long-term investments 1,080  
Total investments 1,080  
Other long-term investments    
Schedule of Investments [Line Items]    
Current investments 0  
Long-term investments 4,884  
Total investments 4,884  
Short-term investments    
Schedule of Investments [Line Items]    
Current investments 276  
Long-term investments 0  
Total investments $ 276