EMPLOYEE BENEFITS (Details - Projected benefit obligation and the accumulated benefit obligation was in excess of the related plan assets and components of net periodic benefit cost) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pensions
Pension expense and effect of change in pension expense due to change in discount rate or expected long-term rate of return
Increase in expense due to decrease of 100 basis point in discount rate	$ 57
Increase in expense due to increase of 100 basis point in expected long-term rate of return	1
Decrease in expense due to decrease of 100 basis point in discount rate	4
Decrease in expense due to increase of 100 basis point in expected long-term rate of return	57
Pensions | U.S.
Components of net periodic benefit cost:
Service cost	5	$ 5	$ 5
Interest cost	134	176	162
Expected return on assets	(239)	(229)	(283)
Amortization of prior service cost (credit)	0	0	0
Amortization of net (gain) loss	33	35	28
Net periodic benefit cost (credit)	(67)	(13)	(88)
Settlement (credit) charges	0	0	0
Net benefit cost (credit)	(67)	(13)	(88)
Total recognized in Accumulated other comprehensive income (loss)	(57)	14	(77)
Total recognized in net periodic benefit cost and other comprehensive income (loss)	10	27	11
Pensions | Non U.S. Plans
Components of net periodic benefit cost:
Service cost	21	21	22
Interest cost	10	15	16
Expected return on assets	(21)	(21)	(25)
Amortization of prior service cost (credit)	2	2	2
Amortization of net (gain) loss	8	5	7
Net periodic benefit cost (credit)	20	22	22
Settlement (credit) charges	3	(2)	0
Net benefit cost (credit)	23	20	22
Total recognized in Accumulated other comprehensive income (loss)	(1)	(45)	20
Total recognized in net periodic benefit cost and other comprehensive income (loss)	(24)	(65)	(2)
Postretirement Plans | U.S.
Components of net periodic benefit cost:
Service cost	1	1	1
Interest cost	5	6	6
Expected return on assets	0	0	0
Amortization of prior service cost (credit)	0	0	(1)
Amortization of net (gain) loss	0	(1)	0
Net periodic benefit cost (credit)	6	6	6
Settlement (credit) charges	0	0	0
Net benefit cost (credit)	6	6	6
Total recognized in Accumulated other comprehensive income (loss)	(17)	(17)	9
Total recognized in net periodic benefit cost and other comprehensive income (loss)	(23)	(23)	3
Postretirement Plans | Non U.S. Plans
Components of net periodic benefit cost:
Service cost	1	1	1
Interest cost	2	2	2
Expected return on assets	0	0	0
Amortization of prior service cost (credit)	(1)	(2)	(2)
Amortization of net (gain) loss	0	0	1
Net periodic benefit cost (credit)	2	1	2
Settlement (credit) charges	0	0	0
Net benefit cost (credit)	2	1	2
Total recognized in Accumulated other comprehensive income (loss)	(9)	(10)	12
Total recognized in net periodic benefit cost and other comprehensive income (loss)	$ (11)	$ (11)	$ 10