Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION (Deferred Stock) (Details)

v3.8.0.1
STOCK-BASED COMPENSATION (Deferred Stock) (Details) - Market Based Stock Award [Member] - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2015
Summary of Deferred Stock [Roll Forward]    
Unvested at beginning of period (in shares) 0  
Granted (in shares) 2,500  
Forfeited (in shares) 0  
Vested (in shares) 0  
Unvested at end of period (in shares) 2,500  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]    
Price, Unvested at beginning of period (in dollars per share) $ 0  
Price, Granted (in dollars per share) 26.69  
Price, Forfeited (in dollars per share) 0  
Price, Vested (in dollars per share) 0  
Price, Unvested at end of period (in dollars per share) $ 26.69  
Deferred stock awards requiring the achievement of minimum market conditions $ 2.5  
Vesting period   5 years