INSURANCE LIABILITIES (Details - Discounting of Reserves) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Discounting of Reserves [Line Items]
Workers Compensation Tabular Discount Amount	$ 261		$ 261		$ 285
Workers Compensation Non Tabular Discount Amount	480		480		440
U.S. Workers' compensation	1,574		1,574		1,636
Retroactive Reinsurance	(833)		(833)		(911)
Total reserve discount	741		741		725
Current accident year	11	$ 56	37	$ 94
Accretion and other adjustments to prior year discount	(83)	(25)	(99)	(135)
Effect of interest rate changes	0	0	0	0
Net loss reserve discount benefit (charge)	(72)	31	(62)	(41)
Change in discount on loss reserves ceded under retroactive reinsurance	22	20	78	78
Net change in total reserve discount	(50)	51	16	37
NICO [Member]
Discounting of Reserves [Line Items]
Amortization of deferred gain on retroactive reinsurance	8	29	84	161
Fortitude [Member]
Discounting of Reserves [Line Items]
Total reserve discount	$ 502		$ 502		$ 493
Percent of discount ceded on sale	100.00%		100.00%		100.00%
North America Commercial Insurance
Discounting of Reserves [Line Items]
U.S. Workers' compensation	$ 1,574		$ 1,574		$ 1,636
Retroactive Reinsurance	(833)		(833)		(911)
Total reserve discount	741		741		725
Current accident year	11	56	37	94
Accretion and other adjustments to prior year discount	(83)	(25)	(99)	(117)
Effect of interest rate changes	0	0	0	0
Net loss reserve discount benefit (charge)	(72)	31	(62)	(23)
Change in discount on loss reserves ceded under retroactive reinsurance	22	20	78	78
Net change in total reserve discount	(50)	51	16	55
Other Operations Run-Off
Discounting of Reserves [Line Items]
U.S. Workers' compensation	0		0		0
Retroactive Reinsurance	0		0		0
Total reserve discount	0		0		0
Current accident year	0	0	0	0
Accretion and other adjustments to prior year discount	0	0	0	(18)
Effect of interest rate changes	0	0	0	0
Net loss reserve discount benefit (charge)	0	0	0	(18)
Change in discount on loss reserves ceded under retroactive reinsurance	0	0	0	0
Net change in total reserve discount	0	0	$ 0	(18)
New York
Discounting of Reserves [Line Items]
Nontabular discount rate			5.00%
United Kingdom
Discounting of Reserves [Line Items]
Net loss reserve discount benefit (charge)			$ 121		$ 151
Net change in total reserve discount	$ (39)	$ (12)	$ (30)	$ (20)