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, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	$ 341	$ 241	$ 866	$ 444
Bond and equity securities
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	283	129	638	152
Alternative investments
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	151	96	381	224
Fair Value Option | Long-term debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	$ (93)	$ 16	$ (153)	$ 68