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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Net	$ 17	$ 18
Unrecognized Tax Benefits, Period Increase (Decrease)	0
Unrecognized Tax Benefits	2.6
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	0.3
Unrecognized Tax Benefits, Income Tax Penalties Accrued	$ 0.2

This element represents the amount of statutory penalties accrued as of the date of the statement of financial position for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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- Definition

This element represents the amount of interest expense accrued as of the date of the statement of financial position 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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