Income Taxes - Uncertain Tax Positions (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
Sep. 30, 2011
Components Of Income Tax Expense Benefit Continuing Operations [Abstract]
Foreign tax differential for legislatoin enacted	$ 1.6
U.S. Valuation Allowance Release	$ 4.4

The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to changes in the valuation allowance for deferred tax assets in the period.

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The portion of the difference, between total income tax expense or benefit as reported in the Income Statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations, that is attributable to total foreign income tax expense or benefit. The foreign income tax expense or benefit difference represents the income tax expense or benefit at applicable domestic statutory income tax rates applied to foreign earnings or loss for the period versus the foreign income tax expense or benefit calculated by applying the appropriate foreign tax rates.

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