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RETIREMENT PLANS (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Other Postretirement Benefits Plan [Member]        
Components of net periodic benefit cost [Abstract]        
Service cost $ 0 $ 0 $ 0 $ 0
Interest cost 4 7 9 13
Expected return on assets (1) (1) (2) (2)
Prior service credit, net (9) (10) (19) (20)
Net periodic benefit (credit) cost (6) (4) (12) (9)
UNITED STATES | Pension Plan [Member]        
Components of net periodic benefit cost [Abstract]        
Service cost 6 7 13 14
Interest cost 14 19 28 38
Expected return on assets (33) (33) (67) (65)
Prior service credit, net 0 0 0 0
Net periodic benefit (credit) cost (13) (7) (26) (13)
Foreign Plan [Member] | Pension Plan [Member]        
Components of net periodic benefit cost [Abstract]        
Service cost 4 4 8 7
Interest cost 3 5 7 10
Expected return on assets (8) (8) (16) (16)
Prior service credit, net 0 0 0 0
Net periodic benefit (credit) cost $ (1) $ 1 $ (1) $ 1