v3.26.1
RESERVE FOR LOSSES AND LAE - Schedule of Activity in the Reserve for Losses and Loss Adjustment Expenses (“LAE”) (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]        
Gross reserves beginning of period $ 21,336 $ 19,271    
Less reinsurance recoverables on unpaid losses (3,205) (3,327) $ (3,369) $ (3,391)
Net reserves beginning of period 17,981 17,005 17,966 15,880
Incurred related to:        
Current year 2,625 3,375    
Prior years (104) 25    
Prior years, impact from retroactive reinsurance 0 0    
Total incurred losses and LAE 2,520 3,400    
Paid related to:        
Current year 693 640    
Prior years 1,814 1,769    
Total paid losses and LAE 2,507 2,409    
Foreign exchange/translation adjustment 1 134    
Retroactive reinsurance adjustment 0 0    
Net reserves end of period 17,981 17,005    
Plus reinsurance recoverables on unpaid losses 3,205 3,327 3,369 $ 3,391
Gross reserves end of period 21,187 $ 20,333    
Ceded loss reserves $ 1,006   $ 1,000