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INSURANCE LIABILITIES (Details - Reconciliation of the Net Incurred and Paid Claims Development) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Liability For Claims And Claims Adjustment Expense [Line Items]        
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below $ 43,813 $ 43,289 $ 47,259 $ 51,949
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below 35,213 34,431 31,069 31,690
Gross liability for unpaid losses and loss adjustment expenses 79,026 $ 77,720 $ 78,328 $ 83,639
Reinsurance recoverables 76,300      
Reportable Segments        
Liability For Claims And Claims Adjustment Expense [Line Items]        
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below 36,553      
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below 25,936      
Gross liability for unpaid losses and loss adjustment expenses 62,489      
U.S. Workers Compensation | Reportable Segments        
Liability For Claims And Claims Adjustment Expense [Line Items]        
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below 4,158      
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below 6,169      
Gross liability for unpaid losses and loss adjustment expenses 10,327      
U.S. Excess Casualty | Reportable Segments        
Liability For Claims And Claims Adjustment Expense [Line Items]        
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below 3,850      
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below 4,195      
Gross liability for unpaid losses and loss adjustment expenses 8,045      
U.S. Other Casualty | Reportable Segments        
Liability For Claims And Claims Adjustment Expense [Line Items]        
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below 3,805      
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below 4,191      
Gross liability for unpaid losses and loss adjustment expenses 7,996      
U.S. Financial Lines | Reportable Segments        
Liability For Claims And Claims Adjustment Expense [Line Items]        
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below 5,356      
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below 1,893      
Gross liability for unpaid losses and loss adjustment expenses 7,249      
U.S. Property and Specialty Risks | Reportable Segments        
Liability For Claims And Claims Adjustment Expense [Line Items]        
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below 6,615      
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below 3,587      
Gross liability for unpaid losses and loss adjustment expenses 10,202      
U.S. Personal Insurance | Reportable Segments        
Liability For Claims And Claims Adjustment Expense [Line Items]        
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below 1,001      
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below 2,198      
Gross liability for unpaid losses and loss adjustment expenses 3,199      
UK/Europe Casualty and Financial Lines | Reportable Segments        
Liability For Claims And Claims Adjustment Expense [Line Items]        
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below 7,175      
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below 1,603      
Gross liability for unpaid losses and loss adjustment expenses 8,778      
UK/Europe Property and Special Risks | Reportable Segments        
Liability For Claims And Claims Adjustment Expense [Line Items]        
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below 2,631      
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below 1,492      
Gross liability for unpaid losses and loss adjustment expenses 4,123      
UK/Europe and Japan Personal Insurance | Reportable Segments        
Liability For Claims And Claims Adjustment Expense [Line Items]        
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below 1,962      
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below 608      
Gross liability for unpaid losses and loss adjustment expenses 2,570      
Reconciling Items | Discount On Workers Compensation Lines        
Liability For Claims And Claims Adjustment Expense [Line Items]        
Gross liability for unpaid losses and loss adjustment expenses (1,829)      
Reconciling Items | Other Product Lines        
Liability For Claims And Claims Adjustment Expense [Line Items]        
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below 6,500      
Gross liability for unpaid losses and loss adjustment expenses 15,561      
Reinsurance recoverables 9,100      
Reconciling Items | Unallocated Loss Adjustment Expenses        
Liability For Claims And Claims Adjustment Expense [Line Items]        
Gross liability for unpaid losses and loss adjustment expenses $ 2,805