Income Taxes (Schedule of Tax Years Open to Examination by Jurisdiction) (Details)	6 Months Ended
	Jun. 30, 2011
U.S. IRS [Member]
Open tax years by major tax jurisdiction	2007— 2010
Inland Revenue UK [Member]
Open tax years by major tax jurisdiction	2009 — 2010
Irish Revenue Commissioners [Member]
Open tax years by major tax jurisdiction	2006 — 2010
Swiss Federal Tax Administration [Member]
Open tax years by major tax jurisdiction	2008 — 2010
Inland Revenue Department Hong Kong [Member]
Open tax years by major tax jurisdiction	2009 — 2010
Inland Revenue Department Singapore [Member]
Open tax years by major tax jurisdiction	2010