INSURANCE LIABILITIES (Details - Liability for Unpaid Losses and Loss Adjustment Expenses) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016
Supplementary Insurance Information, by Segment [Line Items]
Gross loss reserves before reinsurance and discount, net of contractual deductible recoverable amounts due from policyholders												$ 12,600	$ 12,800
Collateral Held For Deductible Recoverable Amounts												9,500	9,700
Reconciliation of activity in the Liability for unpaid claims and claims adjustment expense:
Liability for unpaid loss and loss adjustment expenses, beginning of year				$ 77,077				$ 74,942	$ 77,077	$ 74,942	$ 77,260
Reinsurance recoverable, balance at the beginning of the year				(15,532)				(14,339)	(15,532)	(14,339)	(15,648)
Net Liability for unpaid loss and loss adjustment expenses, beginning of year				61,545				60,603	61,545	60,603	61,612
Losses and loss adjustment expenses incurred
Current year									21,079	20,232	20,308
Prior years, other than accretion of discount	$ 212	$ 901	$ 391	61	$ 5,574	$ 273	$ 7	(66)
Prior years, excluding discount and amortization of deferred gain									1,565	5,788	4,119
Prior years, discount charge (benefit)									187	(422)	(71)
Prior years, amortization of deferred gain on retroactive reinsurance									(284)	0	0
Total losses and loss adjustment expenses incurred									22,547	25,598	24,356
Losses and loss adjustment expenses paid
Current year									(5,323)	(5,825)	(5,751)
Prior years									(16,241)	(16,908)	(18,205)
Total losses and loss adjustment expenses paid									(21,564)	(22,733)	(23,956)
Other changes
Foreign exchange effect									788	(463)	(1,429)
Acquisitions									23	0	0
Dispositions									(360)	(1,058)	0
Retroactive reinsurance adjustment (net of discount)									(11,294)	0	20
Reclassified to liabilities held for sale									0	402	0
Total other changes									(10,843)	(1,923)	(1,409)
Net liability for unpaid losses and loss adjustment expenses, balance at end of year	51,685				61,545				51,685	61,545	60,603
Reinsurance recoverable, balance at the end of the year	26,708				15,532				26,708	15,532	14,339
Total, balance at the end of the year	78,393				77,077				78,393	77,077	74,942
Net liability for unpaid losses and loss adjustment expenses as presented in the disaggregated tables below (Last 10 Years)	$ 51,685			$ 61,545	$ 61,545			$ 60,603	51,685	$ 61,545	$ 60,603	$ 51,685	$ 61,545
U.S. Asbestos | NICO [Member]
Losses and loss adjustment expenses incurred
Prior years, discount charge (benefit)									$ 25