INSURANCE LIABILITIES (Details - Liability for Unpaid Losses and Loss Adjustment Expenses) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Jan. 20, 2017
Supplementary Insurance Information, by Segment [Line Items]
Collateral Held For Deductible Recoverable Amounts	$ 9,300		$ 9,300		$ 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	76,713	$ 76,422	78,393	$ 77,077
Reinsurance recoverable, balance at the beginning of the year	(27,406)	(27,660)	(26,708)	(15,532)
Net Liability for unpaid loss and loss adjustment expenses, beginning of year	49,307	48,762	51,685	61,545
Losses and loss adjustment expenses incurred
Current year	6,670	7,511	15,800	16,021
Prior years, excluding discount and amortization of deferred gain	949	901	884	1,354
Prior years, discount charge (benefit)	3	48	(174)	283
Prior years, amortization of deferred gain on retroactive reinsurance	(175)	(75)	(283)	(195)
Total losses and loss adjustment expenses incurred	7,447	8,385	16,227	17,463
Losses and loss adjustment expenses paid
Current year	(1,791)	(1,634)	(3,289)	(3,342)
Prior years	(4,526)	(3,395)	(14,312)	(12,438)
Total losses and loss adjustment expenses paid	(6,317)	(5,029)	(17,601)	(15,780)
Other changes
Foreign exchange effect	(236)	330	(393)	688
Acquisitions	3,020	0	3,020	0
Retroactive reinsurance adjustment (net of discount)	(464)	22	(181)	(11,438)
Reclassified to liabilities held for sale	0	8	0	0
Total other changes	2,320	360	2,446	(10,750)
Net liability for unpaid losses and loss adjustment expenses, balance at end of year	52,757	52,478	52,757	52,478
Reinsurance recoverable, balance at the end of the year	29,202	27,609	29,202	27,609
Total, balance at the end of the year	81,959	80,087	81,959	80,087
U.S. Commercial long-tail exposures | NICO | Accident Years 2015 and Prior
Other changes
Discount on retroactive reinsurance	$ 9	$ 6	$ 22	$ 11
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