Schedule of Valuation and Qualifying Accounts (Details) (Allowance for Doubtful Accounts [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	$ 2.2	$ 2.4	$ 1.3
Bad Debt Expense	2.1	0.1	1.3
Valuation Allowances and Reserves, Balance		2.2	2.4
Valuation Allowances and Reserves, Deductions	(0.3)	(0.3)	(0.2)
Allowance for Doubtful Accounts Receivable	$ 4.6	$ 2.2	$ 2.4