INSURANCE LIABILITIES (Details - Liability for Unpaid Losses and Loss Adjustment Expenses) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Jan. 20, 2017
Supplementary Insurance Information, by Segment [Line Items]
Contractual deductible recoverable amount	$ 12,500		$ 12,500		$ 12,600
Collateral Held For Deductible Recoverable Amounts	9,300		9,300		9,200
Allowance for credit losses for unsecured reinsurance recoverable	14		14		$ 14
Reconciliation of activity in the Liability for unpaid claims and claims adjustment expense:
Liability for unpaid loss and loss adjustment expenses, beginning of period	78,832	$ 77,747	77,720	$ 78,328
Reinsurance recoverable, balance at the beginning of the period	(35,271)	(31,114)	(34,431)	(31,069)
Initial allowance upon CECL adoption	0	0	0	164
Net Liability for unpaid loss and loss adjustment expenses, beginning of period	43,561	46,633	43,289	47,423
Losses and loss adjustment expenses incurred
Current year	3,870	4,248	7,795	8,359
Prior years, excluding discount and amortization of deferred gain	(29)	(25)	(13)	(26)
Prior years, discount charge (benefit)	34	34	16	110
Prior years, amortization of deferred gain on retroactive reinsurance	(22)	(76)	(94)	(151)
Total losses and loss adjustment expenses incurred	3,853	4,181	7,704	8,292
Losses and loss adjustment expenses paid
Current year	(895)	(910)	(1,223)	(1,252)
Prior years	(2,620)	(3,790)	(6,204)	(8,141)
Total losses and loss adjustment expenses paid	(3,515)	(4,700)	(7,427)	(9,393)
Other changes:
Foreign exchange effect	113	(39)	357	(269)
Allowance for credit losses	0	0	0	0
Retroactive reinsurance adjustment (net of discount)	103	138	192	160
Fortitude sale	0	(3,818)	0	(3,818)
Total other changes	216	(3,719)	549	(3,927)
Net liability for unpaid losses and loss adjustment expenses, end of period	44,115	42,395	44,115	42,395
Reinsurance recoverable, balance at the end of the period	34,866	35,458	34,866	35,458
Total, balance at the end of period	78,981	77,853	78,981	77,853
Change in discount on loss reserves ceded under retroactive reinsurance	17	(14)	56	58
U.S. Commercial long-tail exposures | NICO | Accident Years 2015 and Prior
Other changes:
Discount on retroactive reinsurance	$ 1	$ 11	$ 18	$ 19
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