FAIR VALUE MEASUREMENTS (Details - Gains or losses recorded related to the eligible instruments for which we elected the fair value option) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option credit risk gains (losses) on liabilities	$ 4	$ 4	$ 22
Fair Value Option
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	555	2,105	466
Fair Value Option | Bond and equity securities
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	343	1,646	447
Fair Value Option | Alternative investments
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	213	509	28
Fair Value Option | Other, Including Short-term investments
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	0	1	0
Fair Value Option | Long-term debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	(1)	(49)	(9)
Fair Value Option | Other liabilities
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	$ 0	$ (2)	$ 0