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RETIREMENT PLANS (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
United States Pension Plans of US Entity, Defined Benefit [Member]        
Components of net periodic benefit cost [Abstract]        
Service cost $ 9 $ 10 $ 18 $ 20
Interest cost 16 19 33 37
Expected return on assets (35) (34) (70) (68)
Prior service credit, net (1) (1) (2) (2)
Net periodic benefit (credit) cost (11) (6) (21) (13)
Foreign Pension Plans, Defined Benefit [Member]        
Components of net periodic benefit cost [Abstract]        
Service cost 4 3 7 6
Interest cost 4 6 9 12
Expected return on assets (9) (8) (17) (16)
Prior service credit, net 0 0 0 0
Net periodic benefit (credit) cost (1) 1 (1) 2
Post Retirement Welfare Plans [Member]        
Components of net periodic benefit cost [Abstract]        
Service cost 1 1 2 3
Interest cost 6 7 12 14
Expected return on assets (1) (1) (3) (3)
Prior service credit, net (10) (10) (20) (20)
Net periodic benefit (credit) cost $ (4) $ (3) $ (9) $ (6)