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RETIREMENT PLANS (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Other Postretirement Benefits Plan [Member]        
Components of net periodic benefit cost [Abstract]        
Service cost $ 0 $ 0 $ 0 $ 0
Interest cost 6 6 19 17
Expected return on assets (2) (2) (4) (4)
Prior service credit, net (9) (10) (29) (30)
Net periodic benefit (credit) cost (5) (6) (14) (17)
UNITED STATES | Pension Plan [Member]        
Components of net periodic benefit cost [Abstract]        
Service cost 6 9 20 26
Interest cost 19 16 57 50
Expected return on assets (31) (36) (96) (110)
Prior service credit, net 0 0 0 0
Net periodic benefit (credit) cost (6) (11) (19) (34)
Foreign Plan [Member] | Pension Plan [Member]        
Components of net periodic benefit cost [Abstract]        
Service cost 4 3 11 11
Interest cost 5 5 15 15
Expected return on assets (8) (9) (24) (28)
Prior service credit, net 0 0 0 0
Net periodic benefit (credit) cost $ 1 $ (1) $ 2 $ (2)