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EQUITY - Dividends (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Feb. 08, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Equity          
Total dividends paid for ordinary share   $ 269 $ 279 $ 272  
Propsed interim dividend, as a percentage of the total dividend from the previous year   40.00%      
Distributable reserves   $ 2,569      
Ordinary shares          
Equity          
Ordinary final dividends per share     $ 0.185 $ 0.190 $ 0.186
Interim dividend per ordinary share   $ 0.123 $ 0.123 $ 0.118  
Ordinary dividends paid relating to prior years   $ 162 $ 170 $ 166  
Ordinary dividends paid relating to current years   107 109 106  
Total dividends paid for ordinary share   269 $ 279 $ 272  
Proposed final dividend per ordinary share $ 0.227        
Total proposed dividends   $ 198