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RETIREMENT PLANS (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Other Postretirement Benefits Plan [Member]        
Components of net periodic benefit cost [Abstract]        
Service cost $ 0 $ 0 $ 0 $ 2
Interest cost 6 6 17 18
Expected return on assets (2) (1) (4) (4)
Prior service credit, net (10) (10) (30) (30)
Net periodic benefit (credit) cost (6) (5) (17) (14)
Foreign Plan [Member] | Pension Plan [Member]        
Components of net periodic benefit cost [Abstract]        
Service cost 3 3 11 10
Interest cost 5 5 15 14
Expected return on assets (9) (8) (28) (25)
Prior service credit, net 0 0 0 0
Net periodic benefit (credit) cost (1) 0 (2) (1)
Domestic Plan [Member] | Pension Plan [Member]        
Components of net periodic benefit cost [Abstract]        
Service cost 9 10 26 28
Interest cost 16 16 50 49
Expected return on assets (36) (35) (110) (105)
Prior service credit, net 0 (1) 0 (3)
Net periodic benefit (credit) cost $ (11) $ (10) $ (34) $ (31)