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Commitments And Contingencies (Details) (Foreign Tax Authority, USD $) In Millions, unless otherwise specified	12 Months Ended	3 Months Ended	6 Months Ended
	Dec. 31, 2012 Tax Year 2007 to 2012 [Member]	Jun. 30, 2013 Tax Year 2013 [Member]	Jun. 30, 2013 Tax Year 2013 [Member]
Loss Contingencies [Line Items]
Income Tax Contingency, Potential Assessment	$ 44.5
Unrecognized Tax Benefits, Interest on Income Taxes Expense		$ 0.4	$ 0.7

This element represents interest expense recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.

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