Acquisitions, Alexco Purchase Price Allocation Table (Details) (USD $) In Millions, unless otherwise specified			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011 Alexco	Dec. 31, 2013 Alexco	Jan. 03, 2011 Alexco	Jan. 03, 2011 Alexco Customer relationships	Jan. 03, 2011 Alexco Backlog	Jan. 03, 2011 Alexco Trademark and trade name
Business Acquisition
Cash				$ 4.9
Accounts receivable, net					3.6
Inventory					6.6
Property, plant and equipment					4.5
Definite-lived intangible assets:						34.7	0.3	0.4
Goodwill	37.2	37.2			34.1
Accounts payable and other current liabilities					(1.0)
Cash consideration paid			$ 88.1