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GENERAL AND ADMINISTRATIVE EXPENSES (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Disclosure of Administrative Expense [Line Items]    
Administrative expenses $ 212 $ 265
Severance payments 18 63
Employee costs 131 156
Corporate administration    
Disclosure of Administrative Expense [Line Items]    
Administrative expenses 185 239
Operating segment administration    
Disclosure of Administrative Expense [Line Items]    
Administrative expenses $ 27 $ 26