Fair Value of the liabilities incurred by the acquirer to former owners of the acquiree, including the fair value of any contingent consideration. If liabilities transferred as consideration remain within the combined entity after the business combination (for example, because the assets or liabilities were transferred to the acquiree rather than to its former owners), and the acquirer therefore retains control of them; in that situation, the acquirer measures those liabilities at their carrying amounts immediately before the acquisition date.

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+ Details

Acquisitions, Textuals (Details) (USD $) In Millions	9 Months Ended				36 Months Ended
Acquisitions, Textuals (Details) (USD $) In Millions	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011 Alexco [Member]	Jan. 03, 2011 Alexco [Member]	Dec. 31, 2010 Nichols [Member]	Aug. 09, 2010 Nichols [Member]
Acquisition (Textuals) [Abstract]
Cash consideration for acquisition	$ 83.2	$ 9.0
Issuance/ Outstanding balance of promissory note						6.7
Business Acquisition liabilities assumed				1.0		2.1
Total acquisition-related costs			$ 0.1		$ 0.8
Period for Goodwill Expected to be Deductible for Income Tax Purposes				15 years		15 years