Valuation and Qualifying Accounts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 10.2	$ 11.7	$ 10.6
Charged to Costs and Expenses	18.6	13.8	13.5
Deductions	(17.3)	(15.3)	(12.6)
Charged to Other Accounts	(0.1)	0	0.2
Balance at End of Period	11.4	10.2	11.7
Allowances for Trade Receivables [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	9.4	10.9	9.6
Charged to Costs and Expenses	2.2	1.1	2.0
Deductions	(0.7)	(2.6)	(0.9)
Charged to Other Accounts	(0.1)	0	0.2
Balance at End of Period	10.8	9.4	10.9
Allowances for Inventory Reserves [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	0.8	0.8	1.0
Charged to Costs and Expenses	16.4	12.7	11.5
Deductions	(16.6)	(12.7)	(11.7)
Charged to Other Accounts	0	0	0
Balance at End of Period	$ 0.6	$ 0.8	$ 0.8