INSURANCE LIABILITIES (Details - Liability for Unpaid Losses and Loss Adjustment Expenses) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Dec. 31, 2017	Jan. 20, 2017
Supplementary Insurance Information, by Segment [Line Items]
Collateral Held For Deductible Recoverable Amounts					$ 9,400	$ 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	$ 78,098	$ 76,050	$ 78,393	$ 77,077
Reinsurance recoverable, balance at the beginning of the year	(27,211)	(26,920)	(26,708)	(15,532)
Net Liability for unpaid loss and loss adjustment expenses, beginning of year	50,887	49,130	51,685	61,545
Losses and loss adjustment expenses incurred
Current year	4,452	4,209	9,130	8,510
Prior years, excluding discount and amortization of deferred gain	(26)	391	(65)	453
Prior years, discount charge (benefit)	9	260	(177)	235
Prior years, amortization of deferred gain on retroactive reinsurance	(69)	(82)	(108)	(120)
Total losses and loss adjustment expenses incurred	4,366	4,778	8,780	9,078
Losses and loss adjustment expenses paid
Current year	(910)	(1,137)	(1,520)	(1,708)
Prior years	(4,635)	(4,252)	(9,414)	(9,043)
Total losses and loss adjustment expenses paid	(5,545)	(5,389)	(10,934)	(10,751)
Other changes
Foreign exchange effect	(431)	463	(157)	358
Retroactive reinsurance adjustment (net of discount)	30	(299)	(67)	(11,460)
Reclassified to liabilities held for sale	0	79	0	(8)
Total other changes	(401)	243	(224)	(11,110)
Net liability for unpaid losses and loss adjustment expenses, balance at end of year	49,307	48,762	49,307	48,762
Reinsurance recoverable, balance at the end of the year	27,406	27,660	27,406	27,660
Total, balance at the end of the year	76,713	76,422	76,713	76,422
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below (Last 10 Years)	50,887	49,130	51,685	61,545	$ 49,307	$ 51,685
U.S. Commercial long-tail exposures | NICO | Accident Years 2015 and Prior
Other changes
Discount on retroactive reinsurance	$ 8	$ 10	$ 13	$ 13
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