INSURANCE LIABILITIES (Details - Liability for Unpaid Losses and Loss Adjustment Expenses) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2020	Dec. 31, 2019	Jan. 20, 2017
Supplementary Insurance Information, by Segment [Line Items]
Contractual deductible recoverable amount	$ 12,300		$ 12,300			$ 12,200
Collateral Held For Deductible Recoverable Amounts	9,100		9,100			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	77,747	$ 82,496	78,328	$ 83,639
Reinsurance recoverable, balance at the beginning of the period	(31,114)	(31,784)	(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	46,633	50,712	47,423	51,949
Losses and loss adjustment expenses incurred
Current year	4,248	4,272	8,359	8,569
Prior years, excluding discount and amortization of deferred gain	(25)	(132)	(26)	(147)
Prior years, discount charge (benefit)	34	244	110	741
Prior years, amortization of deferred gain on retroactive reinsurance	(76)	(56)	(151)	(142)
Total losses and loss adjustment expenses incurred	4,181	4,328	8,292	9,021
Losses and loss adjustment expenses paid
Current year	(910)	(1,060)	(1,252)	(1,377)
Prior years	(3,790)	(4,127)	(8,141)	(9,766)
Total losses and loss adjustment expenses paid	(4,700)	(5,187)	(9,393)	(11,143)
Other changes
Foreign exchange effect	(39)	(209)	(269)	7
Allowance for credit losses	0	0	0	0
Retroactive reinsurance adjustment (net of discount)	138	80	160	(110)
Fortitude sale and reinsurance adjustment	(3,818)	0	(3,818)	0
Total other changes	(3,719)	(129)	(3,927)	(103)
Net liability for unpaid losses and loss adjustment expenses, balance at end of period	42,395	49,724	42,395	49,724
Reinsurance recoverable, balance at the end of the period	35,458	31,333	35,458	31,333
Total, balance at the end of period	77,853	81,057	77,853	81,057
Change in discount on loss reserves ceded under retroactive reinsurance	(14)	125	58	432
U.S. Commercial long-tail exposures | NICO | Accident Years 2015 and Prior
Other changes
Discount on retroactive reinsurance	$ 12	$ 6	$ 20	$ 15
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