INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Effective income tax rate (as a percent)	21.40%	24.10%	19.60%	24.10%
Recognized discrete tax expense (benefit)	$ (9.7)	$ 3.9	$ (32.5)	$ (0.9)
Accounting Standards Update 2016-09
Recognized discrete tax expense (benefit)	$ (10.8)		$ (26.8)