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Summary of Significant Accounting Policies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 segment	Mar. 31, 2013	Dec. 31, 2013
Summary Of Significant Accounting Policies [Line Items]
Deferred Revenue, Current	$ 2.8		$ 2.1
Inventory	39.8		73.6
Unit-based compensation expense	$ 5.4	$ 0.6
Number of Operating Segments	3

The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

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