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CASH AND CASH EQUIVALENTS (Details) - USD ($)
$ in Millions
Jun. 30, 2018
Dec. 31, 2017
Jun. 30, 2017
Dec. 31, 2016
CASH AND CASH EQUIVALENTS        
Cash at bank and on hand $ 867 $ 840    
Short-term deposits with original maturity of less than three months 476 464    
Cash and cash equivalents 1,343 1,304    
Less overdrafts (201) 0 $ 0  
Cash and cash equivalents net of overdrafts as presented in the consolidated statement of cash flows 1,142 1,304 $ 2,873 $ 2,942
Restricted cash 0 0    
Investments in money market funds $ 281 $ 91