INSURANCE LIABILITIES (Details - Liability for Unpaid Losses and Loss Adjustment Expenses) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Jan. 20, 2017
Supplementary Insurance Information, by Segment [Line Items]
Collateral Held For Deductible Recoverable Amounts	$ 9,500		$ 9,500
Reconciliation of activity in the Liability for unpaid claims and claims adjustment expense:
Liability for unpaid loss and loss adjustment expenses, beginning of year	78,393	$ 77,077
Reinsurance recoverable, balance at the beginning of the year	(26,708)	(15,532)
Net Liability for unpaid loss and loss adjustment expenses, beginning of year	51,685	61,545
Losses and loss adjustment expenses incurred
Current year	4,698	4,300
Prior years, excluding discount and amortization of deferred gain	(40)	63
Prior years, discount charge (benefit)	(205)	(25)
Prior years, amortization of deferred gain on retroactive reinsurance	(39)	(38)
Total losses and loss adjustment expenses incurred	4,414	4,300
Losses and loss adjustment expenses paid
Current year	(610)	(571)
Prior years	(4,779)	(4,753)
Total losses and loss adjustment expenses paid	(5,389)	(5,324)
Other changes
Foreign exchange effect	274	(105)
Acquisitions	0	0
Retroactive reinsurance adjustment (net of discount)	(97)	(11,199)
Reclassified to liabilities held for sale	0	87
Total other changes	177	(11,391)
Net liability for unpaid losses and loss adjustment expenses, balance at end of year	50,887	49,130
Reinsurance recoverable, balance at the end of the year	27,211	26,920
Total, balance at the end of the year	78,098	76,050
U.S. Commercial long-tail exposures | NICO | Accident Years 2015 and Prior
Other changes
Discount on retroactive reinsurance	$ 128	$ 1,700
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