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RETIREMENT PLANS (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Other Postretirement Benefits Plan [Member]        
Components of net periodic benefit cost [Abstract]        
Service cost $ 0 $ 1 $ 0 $ 2
Interest cost 5 6 11 12
Expected return on assets 0 (1) (2) (3)
Prior service credit, net (10) (10) (20) (20)
Net periodic benefit (credit) cost (5) (4) (11) (9)
Foreign Plan [Member] | Pension Plan [Member]        
Components of net periodic benefit cost [Abstract]        
Service cost 4 4 8 7
Interest cost 5 4 10 9
Expected return on assets (10) (9) (19) (17)
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 8 9 17 18
Interest cost 17 16 34 33
Expected return on assets (37) (35) (74) (70)
Prior service credit, net 0 (1) 0 (2)
Net periodic benefit (credit) cost $ (12) $ (11) $ (23) $ (21)