INSURANCE LIABILITIES (Details - Liability for Unpaid Losses and Loss Adjustment Expenses) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Jan. 20, 2017
Supplementary Insurance Information, by Segment [Line Items]
Contractual deductible recoverable amount	$ 12,300		$ 12,200
Collateral Held For Deductible Recoverable Amounts	8,900		8,900
Allowance for credit losses for unsecured reinsurance recoverable	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	78,328	$ 83,639
Reinsurance recoverable, balance at the beginning of the period	(31,069)	(31,690)
Initial allowance upon adoption	164	0
Net Liability for unpaid loss and loss adjustment expenses, beginning of period	47,423	51,949
Losses and loss adjustment expenses incurred
Current year	4,111	4,297
Prior years, excluding discount and amortization of deferred gain	(1)	(15)
Prior years, discount charge (benefit)	76	497
Prior years, amortization of deferred gain on retroactive reinsurance	(75)	(86)
Total losses and loss adjustment expenses incurred	4,111	4,693
Losses and loss adjustment expenses paid
Current year	(342)	(317)
Prior years	(4,351)	(5,639)
Total losses and loss adjustment expenses paid	(4,693)	(5,956)
Other changes
Foreign exchange effect	(230)	216
Allowance for credit losses	0	0
Retroactive reinsurance adjustment (net of discount)	22	(190)
Total other changes	(208)	26
Net liability for unpaid losses and loss adjustment expenses, balance at end of period	46,633	50,712
Reinsurance recoverable, balance at the end of the period	31,114	31,784
Total, balance at the end of period	77,747	82,496
Change in discount on loss reserves ceded under retroactive reinsurance	72	307
U.S. Commercial long-tail exposures | NICO | Accident Years 2015 and Prior
Other changes
Discount on retroactive reinsurance	$ 8	$ 9
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