EARNING PER-SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net Income
Net Income, Basic	$ 41.5	$ 21.5	$ 76.4	$ 43.0
Net Income, Diluted	$ 41.5	$ 21.5	$ 76.4	$ 43.0
Weighted Average Common Shares
Basic (in shares)	43.5	43.0	43.5	43.0
Effect of Dilutive Securities (in shares)	0.5	0.4	0.5	0.3
Diluted (in shares)	44.0	43.4	44.0	43.3
Per Common Share Amount, Basic
Net income (in dollars per share)	$ 0.95	$ 0.50	$ 1.76	$ 1.00
Per Common Share Amount, Diluted
Net income (in dollars per share)	$ 0.94	$ 0.50	$ 1.74	$ 1.00