INSURANCE LIABILITIES (Details - Reconciliation of change in net ultimates to prior year development) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Claims and Claims Adjustment Expense	$ 595
Re-Attribution of ADC Recovery	0
Amortization of Deferred Gain at Inception	(233)
Prior Year Development	362
Total, prior years, excluding discount and amortization of deferred gain	1,429	$ 1,565	$ 5,788
Validus Holdings, Ltd
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Claims and Claims Adjustment Expense	30
U.S. Workers Compensation
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Claims and Claims Adjustment Expense	(498)
Re-Attribution of ADC Recovery	589
Amortization of Deferred Gain at Inception	(73)
Prior Year Development	18
Total, prior years, excluding discount and amortization of deferred gain	(179)
U.S. Excess Casualty
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Claims and Claims Adjustment Expense	762
Re-Attribution of ADC Recovery	(370)
Amortization of Deferred Gain at Inception	(56)
Prior Year Development	336
U.S. Other Casualty
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Claims and Claims Adjustment Expense	58
Re-Attribution of ADC Recovery	(26)
Amortization of Deferred Gain at Inception	(51)
Prior Year Development	(19)
Total, prior years, excluding discount and amortization of deferred gain	(299)
U.S. Financial Lines
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Claims and Claims Adjustment Expense	355
Re-Attribution of ADC Recovery	(109)
Amortization of Deferred Gain at Inception	(37)
Prior Year Development	209
Total, prior years, excluding discount and amortization of deferred gain	278
U.S. Property and Specialty Risks
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Claims and Claims Adjustment Expense	(401)
Re-Attribution of ADC Recovery	(69)
Amortization of Deferred Gain at Inception	(13)
Prior Year Development	(483)
U.S. Personal Insurance
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Claims and Claims Adjustment Expense	264
Re-Attribution of ADC Recovery	(14)
Amortization of Deferred Gain at Inception	(2)
Prior Year Development	248
Total, prior years, excluding discount and amortization of deferred gain	253
Europe Casualty and Financial Lines
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Claims and Claims Adjustment Expense	63
Re-Attribution of ADC Recovery	0
Amortization of Deferred Gain at Inception	0
Prior Year Development	63
Total, prior years, excluding discount and amortization of deferred gain	56
Europe Property and Special Risks
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Claims and Claims Adjustment Expense	(24)
Re-Attribution of ADC Recovery	0
Amortization of Deferred Gain at Inception	0
Prior Year Development	(24)
Total, prior years, excluding discount and amortization of deferred gain	(23)
Europe and Japan Personal Insurance
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Claims and Claims Adjustment Expense	(116)
Re-Attribution of ADC Recovery	0
Amortization of Deferred Gain at Inception	0
Prior Year Development	(116)
Total, prior years, excluding discount and amortization of deferred gain	(125)
U.S. Run-Off Long Tail Insurance Lines
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Claims and Claims Adjustment Expense	(4)
Re-Attribution of ADC Recovery	0
Amortization of Deferred Gain at Inception	0
Prior Year Development	(4)
Total, prior years, excluding discount and amortization of deferred gain	(171)
Other Product Lines
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Claims and Claims Adjustment Expense	136
Re-Attribution of ADC Recovery	(1)
Amortization of Deferred Gain at Inception	(1)
Prior Year Development	134
Asbestos LPT
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Development Ceded	96
Adverse Development Reinsurance
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Development Ceded	738
Adverse Development Reinsurance | U.S. Workers Compensation
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Claims and Claims Adjustment Expense	(482)
Adverse Development Reinsurance | U.S. Excess Casualty
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Claims and Claims Adjustment Expense	(478)
Adverse Development Reinsurance | U.S. Other Casualty
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Claims and Claims Adjustment Expense	173
Adverse Development Reinsurance | U.S. Financial Lines
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Claims and Claims Adjustment Expense	49
Adverse Development Reinsurance | U.S. Personal Insurance
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Claims and Claims Adjustment Expense	$ 8