COMMON STOCK REPURCHASES AND CASH DIVIDENDS Common Stock Repurchases (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Oct. 24, 2018	Jan. 30, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Common Stock, Dividends, Per Share, Cash Paid	$ 0.16	$ 0.14	$ 0.48	$ 0.42
Common Stock [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Remaining Authorized Repurchase Amount							$ 44.4
Stock Repurchase Program, Authorized Amount						$ 30.0
Stock Repurchased During Period, Shares			1.1
Stock Repurchased During Period, Value			$ 74.4
Subsequent Event [Member] | Common Stock [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount					$ 80.0