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Income Taxes Rate Reconciliation (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate 35.00% 35.00% 35.00%
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential (85.00%) (34.60%) (42.90%)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes 3.50% (1.20%) 1.60%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance (985.00%) (30.70%) (39.30%)
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings (29.50%) 26.30% 49.60%
Effective Income Tax Rate Reconciliation, Other Adjustments (3.20%) 5.90% (0.40%)
Effective Income Tax Rate, Continuing Operations (1064.20%) 0.70% 3.60%
2010 Tax Benefit from the Monetization of AMT and R&D Credits     $ 1.4
2011 Net Tax Benefit from Audit Settlements and Reversal of State DTL's   $ 4.5