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, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option credit risk gains (losses) on liabilities			$ 4
Fair Value Option
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	$ 1,456	$ 555	2,105
Fair Value Option | Bond and equity securities
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	1,046	343	1,646
Fair Value Option | Alternative investments
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	591	213	509
Fair Value Option | Other, Including Short-term investments
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	0	0	1
Fair Value Option | Long-term debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	(181)	(1)	(49)
Fair Value Option | Other liabilities
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	$ 0	$ 0	$ (2)