FAIR VALUE MEASUREMENTS (Details - Gains or losses recorded related to the eligible instruments for which we elected the fair value option) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	$ 486	$ 330	$ 875	$ (72)
Bonds and equity securities
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	96	374	(3)	314
Alternative investments
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	428	(26)	845	(165)
Long-term debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	$ (38)	$ (18)	$ 33	$ (221)