XML 185 R117.htm IDEA: XBRL DOCUMENT v3.24.0.1
Reserve for Unpaid Losses and Loss Adjustment Expenses - P&C Liabilities for Unpaid Losses and Loss Adjustment Expenses (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]        
Beginning liabilities for unpaid losses and loss adjustment expenses, gross $ 41,243      
Payments        
Ending liabilities for unpaid losses and loss adjustment expenses, gross 42,318 $ 41,243    
Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group        
Provision for unpaid losses and loss adjustment expenses        
Increase (Decrease) in Deferred Revenue 0 0 $ (91)  
Payments        
Policyholder Benefits and Claims Incurred, Ceded 300      
Property and Casualty Insurance Subsidiaries        
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]        
Beginning liabilities for unpaid losses and loss adjustment expenses, gross 33,083 31,449 29,622  
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments 6,696 6,465 6,081 $ 5,725
Beginning liabilities for unpaid losses and loss adjustment expenses, net 26,618 25,368 23,897  
Provision for unpaid losses and loss adjustment expenses        
Current accident year 9,538 8,577 7,911  
Prior accident year development [1] 10 36 199  
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims 9,548 8,613 8,110  
Payments        
Current accident year (2,716) (2,424) (2,276)  
Prior accident years (5,926) (4,678) (4,119)  
Total payments (8,642) (7,102) (6,395)  
Foreign currency adjustment 18 (32) 2  
Unpaid Losses and Loss Adjustment Expenses, Net of Reinsurance 27,348 26,618 25,368 $ 23,897
Ending liabilities for unpaid losses and loss adjustment expenses, gross 34,044 33,083 31,449  
Policyholder Benefits and Claims Incurred, Ceded 1,043 1,338 1,243  
Property and Casualty Insurance Subsidiaries | Reinsurance Policy, Type [Axis]: Adverse Development Cover Navigators Group        
Provision for unpaid losses and loss adjustment expenses        
Increase (Decrease) in Deferred Revenue $ (194) $ (229) $ (246)