INSURANCE LIABILITIES (Details - Liability for Unpaid Losses and Loss Adjustment Expenses) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Jan. 20, 2017
Supplementary Insurance Information, by Segment [Line Items]
Collateral Held For Deductible Recoverable Amounts	$ 9,000.0		$ 9,000.0		$ 9,200.0
Reconciliation of activity in the Liability for unpaid claims and claims adjustment expense:
Liability for unpaid loss and loss adjustment expenses, beginning of year	81,057.0	$ 76,713.0	83,639.0	$ 78,393.0
Reinsurance recoverable, balance at the beginning of the year	(31,333.0)	(27,406.0)	(31,690.0)	(26,708.0)
Net Liability for unpaid loss and loss adjustment expenses, beginning of year	49,724.0	49,307.0	51,949.0	51,685.0
Losses and loss adjustment expenses incurred
Current year	5,150.0	6,670.0	14,750.0	15,800.0
Prior years, excluding discount and amortization of deferred gain	(74.0)	949.0	(221.0)	884.0
Prior years, discount charge (benefit)	276.0	3.0	1,017.0	(174.0)
Prior years, amortization of deferred gain on retroactive reinsurance	13.0	(175.0)	(129.0)	(283.0)
Total losses and loss adjustment expenses incurred	5,365.0	7,447.0	15,417.0	16,227.0
Losses and loss adjustment expenses paid
Current year	(1,702.0)	(1,791.0)	(3,194.0)	(3,289.0)
Prior years	(4,652.0)	(4,526.0)	(15,334.0)	(14,312.0)
Total losses and loss adjustment expenses paid	(6,354.0)	(6,317.0)	(18,528.0)	(17,601.0)
Other changes
Foreign exchange effect	(172.0)	(236.0)	(165.0)	(393.0)
Acquisitions	0.0	3,020.0	0.0	3,020.0
Retroactive reinsurance adjustment (net of discount)	96.0	(464.0)	(14.0)	(181.0)
Total other changes	(76.0)	2,320.0	(179.0)	2,446.0
Net liability for unpaid losses and loss adjustment expenses, balance at end of year	48,659.0	52,757.0	48,659.0	52,757.0
Reinsurance recoverable, balance at the end of the year	31,224.0	29,202.0	31,224.0	29,202.0
Total, balance at the end of the year	79,883.0	81,959.0	79,883.0	81,959.0
Change in discount on loss reserves ceded under retroactive reinsurance	(43.0)	46.0	(475.0)	154.0
U.S. Commercial long-tail exposures | NICO | Accident Years 2015 and Prior
Other changes
Discount on retroactive reinsurance	$ 6.0	$ 9.0	$ 21.0	$ 22.0
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						$ 25,000.0
Ceded to NICO net paid losses in excess, aggregate limit						25,000.0
NICO's limit of liability under the contract						20,000.0
Consideration paid, including interest						$ 10,200.0