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Derivative Financial Instruments (Narrative) (Details)
In Millions, unless otherwise specified
Sep. 30, 2011
USD ($)
Sep. 30, 2011
EUR (€)
Sep. 30, 2011
Non-Designated Hedges [Member]
Derivatives, Fair Value [Line Items]   
Number of currencies that foreign currency forward contract, non-designated as hedges, are held in as of the balance sheet date  12
Notional amount of foreign currency derivatives not designated as hedges$ 145.6  
Net unrealized gain on net investment hedges in accumulated other comprehensive income10.9  
Notional value of net investment hedges € 75