INSURANCE LIABILITIES (Details - Reconciliation of the Net Incurred and Paid Claims Development) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Liability For Claims And Claims Adjustment Expense [LineItems]
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below (Last 10 Years)	$ 51,949	$ 51,685	$ 61,545	$ 60,603
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	31,690	26,708	15,532	14,339
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	83,639	$ 78,393	$ 77,077	$ 74,942
Reportable Segments
Liability For Claims And Claims Adjustment Expense [LineItems]
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below (Last 10 Years)	45,501
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	29,266
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	74,767
Reportable Segments | U.S. Workers Compensation
Liability For Claims And Claims Adjustment Expense [LineItems]
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below (Last 10 Years)	5,834
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	7,038
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	12,872
Reportable Segments | U.S. Excess Casualty
Liability For Claims And Claims Adjustment Expense [LineItems]
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below (Last 10 Years)	4,715
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	4,576
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	9,291
Reportable Segments | U.S. Other Casualty
Liability For Claims And Claims Adjustment Expense [LineItems]
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below (Last 10 Years)	4,288
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	4,661
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	8,949
Reportable Segments | U.S. Financial Lines
Liability For Claims And Claims Adjustment Expense [LineItems]
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below (Last 10 Years)	5,315
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	1,960
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	7,275
Reportable Segments | U.S. Property and Specialty Risks
Liability For Claims And Claims Adjustment Expense [LineItems]
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below (Last 10 Years)	6,534
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	2,748
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	9,282
Reportable Segments | U.S. Personal Insurance
Liability For Claims And Claims Adjustment Expense [LineItems]
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below (Last 10 Years)	1,706
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	1,001
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	2,707
Reportable Segments | Europe Casualty and Financial Lines
Liability For Claims And Claims Adjustment Expense [LineItems]
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below (Last 10 Years)	7,022
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	1,789
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	8,811
Reportable Segments | Europe Property and Special Risks
Liability For Claims And Claims Adjustment Expense [LineItems]
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below (Last 10 Years)	2,988
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	1,251
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	4,239
Reportable Segments | Europe and Japan Personal Insurance
Liability For Claims And Claims Adjustment Expense [LineItems]
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below (Last 10 Years)	2,264
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	553
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	2,817
Reportable Segments | U.S. Run-Off Long Tail Insurance Lines
Liability For Claims And Claims Adjustment Expense [LineItems]
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below (Last 10 Years)	4,835
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	3,689
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	8,524
Reconciling Items | Discount On Workers Compensation Lines
Liability For Claims And Claims Adjustment Expense [LineItems]
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	(3,755)
Reconciling Items | Other Product Lines
Liability For Claims And Claims Adjustment Expense [LineItems]
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	8,974
Reconciling Items | Unallocated Loss Adjustment Expenses
Liability For Claims And Claims Adjustment Expense [LineItems]
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	$ 3,653