v3.7.0.1
INCOME TAXES (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
INCOME TAXES        
Income tax (expense) benefit $ 55 $ (39) $ 27 $ (73)
Effective tax rate (as a percent)     (25.00%) 17.00%
income tax benefit for favorable resolution of income tax matters     $ 32  
Discrete tax benefits     $ 17 $ 60
Income tax refund claims       11
Income tax charge for uncertain tax position       $ 32
Effective tax rates excluding discrete items     20.00% 26.00%
Unrecognized tax benefits may be recognized within the next twelve months $ 30   $ 30