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Income Taxes (Tables)
6 Months Ended
Jun. 30, 2011
Income Taxes  
Schedule of Tax Years Open to Examination by Jurisdiction
         
    Fiscal Years
U.S. Internal Revenue Service for the U.S. subsidiaries
    2007— 2010  
Inland Revenue for the U.K. branches
    2009 — 2010  
Irish Revenue Commissioners for the Irish subsidiaries
    2006 — 2010  
Swiss Federal Tax Administration for the Swiss branch
    2008 — 2010  
Inland Revenue Department for the Hong Kong branch
    2009 — 2010  
Inland Revenue Department for the Singapore branch
    2010