Summary of Significant Accounting Policies Cost of Sales and Selling, General and Administrative Expenses (Details) (Distribution [Member], Cost of Sales and Selling, General and Administrative Expenses [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Distribution [Member] | Cost of Sales and Selling, General and Administrative Expenses [Member]
Component of Operating Other Cost and Expense [Line Items]
Inventory Related Costs Including Purchasing Costs, Receiving Costs and Inspection Costs	$ 3.4	$ 3.0	$ 3.0