EQUITY AND EARNINGS PER SHARE - Activity in Outstanding Options (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning balance, Outstanding options (in shares)	13,196,610.00	12,380,107
Options granted (in shares)	5,654,578	2,002,000
Options exercised (in shares)	0	(1,100,497)
Options expired unexercised (in shares)	(349,000)	(85,000)
Ending balance, Outstanding options (in shares)	18,502,188.000	13,196,610.00
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted average exercise price, options granted (in dollars per share)	$ 15.00	$ 14.20
Weighted average exercise price, options exercised (in dollars per share)	$ 0.00	$ 10.59
Option exercised (in shares)	0	1,100,497
Intrinsic value of options exercised		$ 4.0