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		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	$ 259	$ 400	$ 703	$ 1,427
Fair value option credit risk gains (losses) on liabilities	0	2	1	2
Fair Value Option | Long-term debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	6	(18)	74	(66)
Fair Value Option | Other liabilities
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	0	(1)	0	(2)
Fair Value Option | Bond and equity securities
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	122	289	274	1,088
Fair Value Option | Alternative investments
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	131	129	355	406
Fair Value Option | Other, Including Short Term Investments
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value option gain (loss)	$ 0	$ 1	$ 0	$ 1