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TRADE AND OTHER RECEIVABLES (Details) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
TRADE AND OTHER RECEIVABLES      
Trade receivables, gross $ 788 $ 769  
Allowance for doubtful debt (169) (160) $ (182)
Trade receivables, net 619 609  
Other receivables 126 76  
Total trade and other receivables $ 745 $ 685