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RETIREMENT PLANS (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Other Postretirement Benefits Plan [Member]        
Components of net periodic benefit cost [Abstract]        
Service cost $ 0 $ 0 $ 0 $ 0
Interest cost 5 6 14 19
Expected return on assets (2) (2) (4) (4)
Prior service credit, net (9) (9) (28) (29)
Net periodic benefit (credit) cost (6) (5) (18) (14)
UNITED STATES | Pension Plan [Member]        
Components of net periodic benefit cost [Abstract]        
Service cost 6 6 19 20
Interest cost 15 19 43 57
Expected return on assets (34) (31) (101) (96)
Prior service credit, net 0 0 0 0
Net periodic benefit (credit) cost (13) (6) (39) (19)
Foreign Plan [Member] | Pension Plan [Member]        
Components of net periodic benefit cost [Abstract]        
Service cost 5 4 13 11
Interest cost 4 5 11 15
Expected return on assets (9) (8) (25) (24)
Prior service credit, net 0 0 0 0
Net periodic benefit (credit) cost $ 0 $ 1 $ (1) $ 2