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FINANCIAL LIABILITIES (Details) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Current:    
Foreign currency forward contracts $ 150 $ 47
Other financial liabilities 87 182
Total current financial liabilities 237 229
Non-current:    
Interest rate swaps 9 34
Inflation swaps 84 97
Deferred consideration 916 0
Other financial liabilities 67 21
Total non-current financial liabilities $ 1,076 $ 152