EMPLOYEE BENEFITS (Details - Components of net periodic benefit cost) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Pensions
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 6	$ 8	$ 19	$ 23
Interest cost	36	47	108	142
Expected return on assets	(65)	(63)	(194)	(188)
Amortization of prior service cost (credit)	1	0	2	1
Amortization of net loss	10	10	30	29
Net periodic benefit cost (credit)	(12)	2	(35)	7
Settlement (credit) charges	0	0	0	(3)
Net benefit cost (credit)	(12)	2	(35)	4
Pensions | U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	2	4	7
Interest cost	33	44	100	131
Expected return on assets	(60)	(58)	(179)	(172)
Amortization of prior service cost (credit)	0	0	0	0
Amortization of net loss	9	9	25	25
Net periodic benefit cost (credit)	(17)	(3)	(50)	(9)
Settlement (credit) charges	0	0	0	0
Net benefit cost (credit)	(17)	(3)	(50)	(9)
Pensions | Non U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	5	6	15	16
Interest cost	3	3	8	11
Expected return on assets	(5)	(5)	(15)	(16)
Amortization of prior service cost (credit)	1	0	2	1
Amortization of net loss	1	1	5	4
Net periodic benefit cost (credit)	5	5	15	16
Settlement (credit) charges	0	0	0	(3)
Net benefit cost (credit)	5	5	15	13
Postretirement Plans
Defined Benefit Plan Disclosure [Line Items]
Net benefit cost (credit)	$ 2	$ 2	$ 6	$ 5