COMMON STOCK REPURCHASES AND CASH DIVIDENDS Common Stock Repurchases (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jan. 30, 2018	Dec. 31, 2017
Common Stock Repurchases and Cash Dividends [Abstract]
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 11.0		$ 11.0			$ 44.4
Stock Repurchase Program, Authorized Amount					$ 30.0
Stock Repurchased During Period, Shares			0.9
Stock Repurchased During Period, Value			$ 63.4
Common Stock, Dividends, Per Share, Cash Paid	$ 0.16	$ 0.14	$ 0.32	$ 0.28