SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Receivable Reserves
Valuation and Qualifying Accounts
Balance at beginning of period	$ 25.6	$ 20.2	$ 12.0
Charged to cost and expenses	6.0	3.7	9.7
Additions (Deductions)	(8.0)	1.7	(1.5)
Balance at end of period	23.6	25.6	20.2
Valuation Allowance on Deferred Tax Assets
Valuation and Qualifying Accounts
Balance at beginning of period	18.5	15.5	19.4
Charged to cost and expenses	4.8	3.0	(3.9)
Additions (Deductions)	13.9
Balance at end of period	$ 37.2	$ 18.5	$ 15.5