Quarterly report pursuant to Section 13 or 15(d)

EQUITY AND EARNINGS PER SHARE - Summary of Outstanding Options (Details)

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EQUITY AND EARNINGS PER SHARE - Summary of Outstanding Options (Details) - $ / shares
1 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Beginning balance, Outstanding options (in shares)   18,502,188
Options granted (in shares)   2,875,000
Options exercised (in shares) (15,803,216) (15,803,216)
Options expired unexercised (in shares)   0
Ending balance, Outstanding options (in shares) 5,573,972.000 5,573,972.000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]    
Weighted average exercise price, granted (in dollars per share)   $ 17.10
Weighted average exercise price, exercised (in dollars per share)   $ 14.30