Schedule II VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Allowance for doubtful accounts
Valuation and qualifying accounts
Balance at Beginning of Year	$ 4.5	$ 4.2	$ 3.5
Additions	2.5	2.8	1.7
Deductions, Recoveries & Other	(1.5)	(2.5)	(1.0)
Balance at Ending of Year	5.5	4.5	4.2
Tax valuation allowance
Valuation and qualifying accounts
Balance at Beginning of Year	17.2	17.3	18.2
Additions	21.5	2.1	0.3
Deductions, Recoveries & Other	(2.1)	(2.2)	(1.2)
Balance at Ending of Year	$ 36.6	$ 17.2	$ 17.3