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OTHER LIABILITIES - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Other Liabilities [Abstract]        
Restructuring expenses $ 28 $ 5 $ 36 $ 8