FAIR VALUE MEASUREMENTS (Details - Gains or losses recorded related to the eligible instruments for which we elected the fair value option) - Fair Value Option - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	$ (402)	$ 525
Bonds
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	(60)	355
Alternative investments
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	(139)	230
Long-term debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	$ (203)	$ (60)