INSURANCE LIABILITIES (Details - Reconciliation of the Net Incurred and Paid Claims Development) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
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)	$ 51,685	$ 61,545	$ 60,603	$ 61,612
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	26,708	15,532	14,339	15,648
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	78,393	$ 77,077	$ 74,942	$ 77,260
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)	45,200
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	24,295
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	69,495
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)	6,616
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	6,513
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	13,129
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)	4,802
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	4,053
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	8,855
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)	5,149
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	4,793
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	9,942
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)	5,104
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	1,962
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	7,066
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)	5,410
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	968
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	6,378
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)	1,380
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	194
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	1,574
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)	6,986
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	1,156
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	8,142
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)	2,022
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	632
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	2,654
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)	2,348
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	349
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	2,697
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)	5,383
Reinsurance recoverable on unpaid losses and loss adjustment expenses included in the disaggregated tables below (Last 10 Years)	3,675
Gross liability for unpaid losses and loss adjustment expenses (Last 10 Years)	9,058
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)	(3,383)
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)	8,568
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)	$ 3,713