INSURANCE LIABILITIES (Details - Narratives) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Insurance Liabilities Disclosure [Line Items]
Gross Loss Reserves Before Reinsurance and Discount Net of Subrogation	$ 12,300	$ 12,600
Collateral Held For Deductible Recoverable Amounts	8,600	9,200
2021 Prior Year Development Excluding the Impact of Adverse Development Reinsurance Agreement	(171)	(90)	$ (340)
Amotization of deferred gain on retroactive teinsurance	137	196	193
Discounting Of Loss Reserves [Abstract]
Loss Reserve Discount	876	725
Workers Compensation Tabular Discount Amount	260	285
Workers Compensation Non Tabular Discount Amount	616	440
(Increase) Decrease in Loss Reserve Discount	$ 193	(516)	(955)
New York
Discounting Of Loss Reserves [Abstract]
Tabular Discount Rate	5.00%
Effective Interest Rates
Discounting Of Loss Reserves [Abstract]
(Increase) Decrease in Loss Reserve Discount	$ 219	(407)	(747)
U.S. Workers Compensation
Insurance Liabilities Disclosure [Line Items]
2021 Prior Year Development Excluding the Impact of Adverse Development Reinsurance Agreement	(617)	(367)	(699)
U.S. Excess Casualty
Insurance Liabilities Disclosure [Line Items]
2021 Prior Year Development Excluding the Impact of Adverse Development Reinsurance Agreement	51	(149)	76
Analysis of loss reserves using traditional loss development and expected loss ratio methods	10
Analysis of Loss reserves for expected losses above threshold	10
U.S. Other Casualty
Insurance Liabilities Disclosure [Line Items]
2021 Prior Year Development Excluding the Impact of Adverse Development Reinsurance Agreement	(1)	(141)	168
U.S. Other Casualty | Commercial Auto Liability
Insurance Liabilities Disclosure [Line Items]
2021 Prior Year Development Excluding the Impact of Adverse Development Reinsurance Agreement	(6)	11	23
U.S. Other Casualty | General Liability
Insurance Liabilities Disclosure [Line Items]
2021 Prior Year Development Excluding the Impact of Adverse Development Reinsurance Agreement	(28)	65	220
U.S. Other Casualty | Medical Malpractice
Insurance Liabilities Disclosure [Line Items]
2021 Prior Year Development Excluding the Impact of Adverse Development Reinsurance Agreement	(25)	(26)	30
U.S. Other Casualty | Other Product Lines
Insurance Liabilities Disclosure [Line Items]
2021 Prior Year Development Excluding the Impact of Adverse Development Reinsurance Agreement	8	(191)	(105)
U.S. Financial Lines
Insurance Liabilities Disclosure [Line Items]
2021 Prior Year Development Excluding the Impact of Adverse Development Reinsurance Agreement	649	479	463
U.S. Property and Special Risks
Insurance Liabilities Disclosure [Line Items]
2021 Prior Year Development Excluding the Impact of Adverse Development Reinsurance Agreement	172	(80)	(204)
U.S. Personal Insurance
Insurance Liabilities Disclosure [Line Items]
2021 Prior Year Development Excluding the Impact of Adverse Development Reinsurance Agreement	(412)	94	(96)
UK/Europe Casualty and Financial Lines
Insurance Liabilities Disclosure [Line Items]
2021 Prior Year Development Excluding the Impact of Adverse Development Reinsurance Agreement	210	258	161
UK/Europe Property and Special Risks
Insurance Liabilities Disclosure [Line Items]
2021 Prior Year Development Excluding the Impact of Adverse Development Reinsurance Agreement	(118)	(155)	(108)
UK/Europe and Japan Personal Insurance
Insurance Liabilities Disclosure [Line Items]
2021 Prior Year Development Excluding the Impact of Adverse Development Reinsurance Agreement	$ (173)	$ (39)	$ (119)