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RETIREMENT PLANS (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Other Postretirement Benefits Plan [Member]        
Components of net periodic benefit cost [Abstract]        
Service cost $ 0 $ 0 $ 0 $ 0
Interest cost 7 5 13 11
Expected return on assets (1) 0 (2) (2)
Prior service credit, net (10) (10) (20) (20)
Net periodic benefit (credit) cost (4) (5) (9) (11)
Foreign Plan [Member] | Pension Plan [Member]        
Components of net periodic benefit cost [Abstract]        
Service cost 4 4 7 8
Interest cost 5 5 10 10
Expected return on assets (8) (10) (16) (19)
Prior service credit, net 0 0 0 0
Net periodic benefit (credit) cost 1 (1) 1 (1)
Domestic Plan [Member] | Pension Plan [Member]        
Components of net periodic benefit cost [Abstract]        
Service cost 7 8 14 17
Interest cost 19 17 38 34
Expected return on assets (33) (37) (65) (74)
Prior service credit, net 0 0 0 0
Net periodic benefit (credit) cost $ (7) $ (12) $ (13) $ (23)