SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - Allowance for doubtful accounts - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Movement in valuation and qualifying accounts
Balance at Beginning of Period	$ 18.3	$ 18.9	$ 20.5
Additions Charged to Costs and Expenses	4.7	4.6	4.0
Deductions	6.7	5.2	10.4
Amounts Charged to Other Accounts			4.8
Balance at End of Period	$ 16.3	$ 18.3	$ 18.9