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SHAREHOLDER'S EQUITY SHAREHOLDERS' EQUITY - DIVIDENDS (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 12 Months Ended
Feb. 20, 2018
Dec. 31, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Subsequent Event [Line Items]          
Cash dividend declared per share   $ 0.30 $ 1.20 $ 1.10 $ 0.80
Cash dividend paid     $ 148 $ 136 $ 102
Subsequent Event [Member]          
Subsequent Event [Line Items]          
Cash dividend declared per share $ 0.32        
Dividend increase 7.00%