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GENERAL AND ADMINISTRATIVE EXPENSES (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of Administrative Expense [Line Items]    
Administrative expenses $ 265 $ 248
Severance payments 63 3
Employee costs 156 98
Corporate administration    
Disclosure of Administrative Expense [Line Items]    
Administrative expenses 239 227
Operating segment administration    
Disclosure of Administrative Expense [Line Items]    
Administrative expenses $ 26 $ 21