INCOME TAXES (Details - U.S. TAX REFORM OVERVIEW) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax [Line Items]
U.S. federal income tax at statutory rate (as a percent)		21.00%	35.00%	35.00%	35.00%
Impact of Tax Act	$ 6,687		$ 6,687	$ 0	$ 0
Tax charge attributable to the reduction in the U.S. corporate income tax			6,700
Tax benefit related to the deemed repatriation tax			38
New deferred tax liabilities	4,464		4,464	$ 6,634
General Insurance Companies
Income Tax [Line Items]
New deferred tax liabilities	$ 1,900		$ 1,900
Long-tail lines of business
Income Tax [Line Items]
Tax Act Discount Period Extension, Minimum			10 years
Tax Act Discount Period Extension, Maximum			24 years