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Segment Reporting (Details Textuals) (USD $)
In Millions, unless otherwise specified
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Segment Reporting (Textuals) [Abstract]    
Number of operating segments  4 
AstraZeneca LP [Member]
    
Schedule of Equity Method Investments [Line Items]    
Revenue from AstraZeneca LP$ 299$ 345$ 928$ 950