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RETIREMENT PLANS (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Other Postretirement Benefits Plan [Member]    
Components of net periodic benefit cost [Abstract]    
Service cost $ 0 $ 0
Interest cost 5 6
Expected return on assets (1) (1)
Prior service credit, net (10) (10)
Net periodic benefit (credit) cost (6) (5)
UNITED STATES | Pension Plan [Member]    
Components of net periodic benefit cost [Abstract]    
Service cost 7 7
Interest cost 14 19
Expected return on assets (34) (32)
Prior service credit, net 0 0
Net periodic benefit (credit) cost (13) (6)
Foreign Plan [Member] | Pension Plan [Member]    
Components of net periodic benefit cost [Abstract]    
Service cost 4 3
Interest cost 4 5
Expected return on assets (8) (8)
Prior service credit, net 0 0
Net periodic benefit (credit) cost $ 0 $ 0