v3.25.4
COLLATERALIZED REINSURANCE, TRUST AGREEMENTS AND OTHER RESTRICTED ASSETS - Schedule of Collateralized Reinsurance Agreements (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Effects of Reinsurance [Line Items]      
Limit $ 2,193 $ 2,418 $ 1,907
Kilimanjaro Re Limited      
Effects of Reinsurance [Line Items]      
Limit 1,530    
Reinsurance Contract [Axis]: Series 2021-1 Class A-2 | Kilimanjaro Re Limited      
Effects of Reinsurance [Line Items]      
Limit 150    
Reinsurance Contract [Axis]: Series 2021-1 Class B-2 | Kilimanjaro Re Limited      
Effects of Reinsurance [Line Items]      
Limit 90    
Reinsurance Contract [Axis]: Series 2021-1 Class C-2 | Kilimanjaro Re Limited      
Effects of Reinsurance [Line Items]      
Limit 90    
Reinsurance Contract [Axis]: Series 2024-1 Class A | Kilimanjaro Re Limited      
Effects of Reinsurance [Line Items]      
Limit 75    
Reinsurance Contract [Axis]: Series 2024-1 Class B | Kilimanjaro Re Limited      
Effects of Reinsurance [Line Items]      
Limit 125    
Reinsurance Contract [Axis]: Series 2025-1 Class A-1 | Kilimanjaro Re Limited      
Effects of Reinsurance [Line Items]      
Limit 105    
Reinsurance Contract [Axis]: Series 2025-1 Class B-1 | Kilimanjaro Re Limited      
Effects of Reinsurance [Line Items]      
Limit 120    
Reinsurance Contract [Axis]: Series 2025-1 Class C-1 | Kilimanjaro Re Limited      
Effects of Reinsurance [Line Items]      
Limit 170    
Reinsurance Contract [Axis]: Series 2025-1 Class D-1 | Kilimanjaro Re Limited      
Effects of Reinsurance [Line Items]      
Limit 105    
Reinsurance Contract [Axis]: Series 2025-2 Class A-2 | Kilimanjaro Re Limited      
Effects of Reinsurance [Line Items]      
Limit 105    
Reinsurance Contract [Axis]: Series 2025-2 Class B-2 | Kilimanjaro Re Limited      
Effects of Reinsurance [Line Items]      
Limit 120    
Reinsurance Contract [Axis]: Series 2025-2 Class C-2 | Kilimanjaro Re Limited      
Effects of Reinsurance [Line Items]      
Limit 170    
Reinsurance Contract [Axis]: Series 2025-2 Class D-2 | Kilimanjaro Re Limited      
Effects of Reinsurance [Line Items]      
Limit $ 105