INSURANCE LIABILITIES (Details - Reconciliation of change in net ultimates to prior year development) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Development Net of External Reinsurance Before ADC Cessions	$ (171)
Prior Year Developnment Net of External Reinsurance Before ADC Cessions	78
Re-Attribution of ADC Recovery	0
Amortization of Deferred Gain at Inception	(193)
Prior Year Development	(115)
Total, prior years, excluding discount and amortization of deferred gain	(171)	$ (90)	$ (340)
U.S. Workers Compensation
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Development Net of External Reinsurance Before ADC Cessions	(617)
Prior Year Developnment Net of External Reinsurance Before ADC Cessions	(403)
Re-Attribution of ADC Recovery	80
Amortization of Deferred Gain at Inception	(60)
Prior Year Development	(383)
Total, prior years, excluding discount and amortization of deferred gain	(617)	(367)	(699)
U.S. Excess Casualty
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Development Net of External Reinsurance Before ADC Cessions	51
Prior Year Developnment Net of External Reinsurance Before ADC Cessions	81
Re-Attribution of ADC Recovery	(40)
Amortization of Deferred Gain at Inception	(46)
Prior Year Development	(5)
Total, prior years, excluding discount and amortization of deferred gain	51	(149)	76
U.S. Other Casualty
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Development Net of External Reinsurance Before ADC Cessions	(1)
Prior Year Developnment Net of External Reinsurance Before ADC Cessions	74
Re-Attribution of ADC Recovery	(23)
Amortization of Deferred Gain at Inception	(44)
Prior Year Development	7
Total, prior years, excluding discount and amortization of deferred gain	(1)	(141)	168
U.S. Financial Lines
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Development Net of External Reinsurance Before ADC Cessions	649
Prior Year Developnment Net of External Reinsurance Before ADC Cessions	564
Re-Attribution of ADC Recovery	(12)
Amortization of Deferred Gain at Inception	(31)
Prior Year Development	521
Total, prior years, excluding discount and amortization of deferred gain	649	479	463
U.S. Property and Specialty Risks
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Development Net of External Reinsurance Before ADC Cessions	172
Prior Year Developnment Net of External Reinsurance Before ADC Cessions	204
Re-Attribution of ADC Recovery	(5)
Amortization of Deferred Gain at Inception	(10)
Prior Year Development	189
U.S. Personal Insurance
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Development Net of External Reinsurance Before ADC Cessions	(412)
Prior Year Developnment Net of External Reinsurance Before ADC Cessions	(411)
Re-Attribution of ADC Recovery	0
Amortization of Deferred Gain at Inception	(2)
Prior Year Development	(413)
Total, prior years, excluding discount and amortization of deferred gain	(412)	94	(96)
UK/Europe Casualty and Financial Lines
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Development Net of External Reinsurance Before ADC Cessions	210
Prior Year Developnment Net of External Reinsurance Before ADC Cessions	210
Re-Attribution of ADC Recovery	0
Amortization of Deferred Gain at Inception	0
Prior Year Development	210
Total, prior years, excluding discount and amortization of deferred gain	210	258	161
UK/Europe Property and Special Risks
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Development Net of External Reinsurance Before ADC Cessions	(118)
Prior Year Developnment Net of External Reinsurance Before ADC Cessions	(118)
Re-Attribution of ADC Recovery	0
Amortization of Deferred Gain at Inception	0
Prior Year Development	(118)
Total, prior years, excluding discount and amortization of deferred gain	(118)	(155)	(108)
UK/Europe and Japan Personal Insurance
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Development Net of External Reinsurance Before ADC Cessions	(173)
Prior Year Developnment Net of External Reinsurance Before ADC Cessions	(173)
Re-Attribution of ADC Recovery	0
Amortization of Deferred Gain at Inception	0
Prior Year Development	(173)
Total, prior years, excluding discount and amortization of deferred gain	(173)	$ (39)	$ (119)
Other Operations Run-Off
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Development Net of External Reinsurance Before ADC Cessions	86
Prior Year Developnment Net of External Reinsurance Before ADC Cessions	86
Re-Attribution of ADC Recovery	0
Amortization of Deferred Gain at Inception	0
Prior Year Development	86
Other Product Lines
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Development Net of External Reinsurance Before ADC Cessions	(18)
Prior Year Developnment Net of External Reinsurance Before ADC Cessions	(36)
Re-Attribution of ADC Recovery	0
Amortization of Deferred Gain at Inception	0
Prior Year Development	(36)
Asbestos LPT
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Development Ceded	0
Adverse Development Reinsurance
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Development Ceded	(249)
Adverse Development Reinsurance | U.S. Workers Compensation
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Developnment Net of External Reinsurance Before ADC Cessions	214
Adverse Development Reinsurance | U.S. Excess Casualty
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Developnment Net of External Reinsurance Before ADC Cessions	30
Adverse Development Reinsurance | U.S. Other Casualty
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Developnment Net of External Reinsurance Before ADC Cessions	75
Adverse Development Reinsurance | U.S. Financial Lines
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Developnment Net of External Reinsurance Before ADC Cessions	(85)
Adverse Development Reinsurance | U.S. Personal Insurance
Reconciliation Of Change In Net Ultimates To Prior Year Development [Line Items]
Prior Year Developnment Net of External Reinsurance Before ADC Cessions	$ 1