INSURANCE LIABILITIES (Details - Liability for Unpaid Losses and Loss Adjustment Expenses) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020	Dec. 31, 2019	Jan. 20, 2017
Supplementary Insurance Information, by Segment [Line Items]
Contractual deductible recoverable amount	$ 12,700		$ 12,700			$ 12,200
Collateral Held For Deductible Recoverable Amounts	9,200		9,200			8,900
Allowance for credit losses for unsecured reinsurance recoverable	14		14		$ 14	$ 0
Reconciliation of activity in the Liability for unpaid claims and claims adjustment expense:
Liability for unpaid loss and loss adjustment expenses, beginning of period	77,853	$ 81,057	78,328	$ 83,639
Reinsurance recoverable, balance at the beginning of the period	(35,458)	(31,333)	(31,069)	(31,690)
Initial allowance upon CECL adoption	0	0	164	0
Net Liability for unpaid loss and loss adjustment expenses, beginning of period	42,395	49,724	47,423	51,949
Losses and loss adjustment expenses incurred
Current year	4,324	4,612	12,683	13,181
Prior years, excluding discount and amortization of deferred gain	20	(74)	(6)	(221)
Prior years, discount charge (benefit)	25	276	135	1,017
Prior years, amortization of deferred gain on retroactive reinsurance	(36)	13	(187)	(129)
Total losses and loss adjustment expenses incurred	4,333	4,827	12,625	13,848
Losses and loss adjustment expenses paid
Current year	(1,316)	(1,572)	(2,568)	(2,949)
Prior years	(3,115)	(4,244)	(11,256)	(14,010)
Total losses and loss adjustment expenses paid	(4,431)	(5,816)	(13,824)	(16,959)
Other changes
Foreign exchange effect	925	(172)	656	(165)
Allowance for credit losses	0	0	0	0
Retroactive reinsurance adjustment (net of discount)	80	96	240	(14)
Fortitude sale and reinsurance adjustment	0	0	(3,818)	0
Total other changes	1,005	(76)	(2,922)	(179)
Net liability for unpaid losses and loss adjustment expenses, balance at end of period	43,302	48,659	43,302	48,659
Reinsurance recoverable, balance at the end of the period	35,282	31,224	35,282	31,224
Total, balance at the end of period	78,584	79,883	78,584	79,883
Change in discount on loss reserves ceded under retroactive reinsurance	20	43	78	475
U.S. Commercial long-tail exposures | NICO | Accident Years 2015 and Prior
Other changes
Discount on retroactive reinsurance	$ 6	$ 6	$ 26	$ 21
Risk Transferred - U.S. Commercial long-tail exposures for accident years 2015 and prior, percent							80.00%
Reinsurance Percent Ceded on Paid Losses Percent							80.00%
Ceded to NICO net paid losses in excess							$ 25,000
Ceded to NICO net paid losses in excess, aggregate limit							25,000
NICO's limit of liability under the contract							20,000
Consideration paid, including interest							$ 10,200