EMPLOYEE BENEFITS (Details - Components of net periodic benefit cost) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Pensions
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 7	$ 7	$ 13	$ 15
Interest cost	35	47	72	95
Expected return on assets	(64)	(63)	(129)	(125)
Amortization of prior service cost (credit)	1	1	1	1
Amortization of net loss	10	10	20	19
Net periodic benefit cost (credit)	(11)	2	(23)	5
Settlement (credit) charges	0	1	0	(3)
Net benefit cost (credit)	(11)	3	(23)	2
Pensions | U.S.
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	3	3	5
Interest cost	33	43	67	87
Expected return on assets	(59)	(57)	(119)	(114)
Amortization of prior service cost (credit)	0	0	0	0
Amortization of net loss	8	8	16	16
Net periodic benefit cost (credit)	(16)	(3)	(33)	(6)
Settlement (credit) charges	0	0	0	0
Net benefit cost (credit)	(16)	(3)	(33)	(6)
Pensions | Non U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	5	4	10	10
Interest cost	2	4	5	8
Expected return on assets	(5)	(6)	(10)	(11)
Amortization of prior service cost (credit)	1	1	1	1
Amortization of net loss	2	2	4	3
Net periodic benefit cost (credit)	5	5	10	11
Settlement (credit) charges	0	1	0	(3)
Net benefit cost (credit)	5	6	10	8
Postretirement Plans
Defined Benefit Plan Disclosure [Line Items]
Net benefit cost (credit)	$ 2	$ 1	$ 4	$ 3