EQUITY AND EARNINGS PER SHARE - Summary of Activity in Outstanding Options (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning balance, Outstanding options (in shares)		12,380,107.000	10,737,093
Options granted (in shares)		2,002,000	8,543,539
Options exercised (in shares)	[1]	(1,100,497)	(6,734,525)
Options expired unexercised (in shares)		(85,000)	(166,000)
Ending balance, Outstanding options (in shares)		13,196,610.00	12,380,107.000
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)		$ 14.20	$ 15.46
Weighted average exercise price, options exercised (in dollars per share)	[1]	$ 10.59	$ 7.81
Intrinsic value of options exercised		$ 4.0	$ 59.4

[1] The 1.1 million and 6.7 million options that were exercised in 2016 and 2015 had an intrinsic value of approximately $4.0 million and $59.4 million, respectively, at the date of exercise.