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Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012 Rate	Jun. 30, 2011 Rate	Jun. 30, 2012 Rate	Jun. 30, 2011 Rate
Income Tax Expense (Benefit) [Abstract]
Statutory federal rate	35.00%	35.00%	35.00%	35.00%
Discrete income tax benefit		$ 39.7
Valuation Allowance, Deferred Tax Asset, Change in Amount	$ 0.4		$ 3.1

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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- Definition

The amount of the change in the period in the valuation allowance for a specified deferred tax asset.

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