v3.26.1
Reserves for Insurance Losses and Loss Adjustment Expenses - Schedule of Rollforward of Our Reserves for Insurance Losses and Loss Adjustment Expenses (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]        
Total gross reserves for insurance losses and loss adjustment expenses, beginning balance $ 233 $ 189    
Less: Reinsurance recoverable 69 60    
Net reserves for insurance losses and loss adjustment expenses 180 192 $ 164 $ 129
Current year 122 161    
Prior years (1) 0    
Total net insurance losses and loss adjustment expenses incurred 121 161    
Current year (50) (44)    
Prior years (55) (54)    
Total net insurance losses and loss adjustment expenses paid or payable (105) (98)    
Plus: Reinsurance recoverable 71 76    
Total gross reserves for insurance losses and loss adjustment expenses, ending balance $ 251 $ 268