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Derivative Financial Instruments (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Cash flow hedge instrument term, maximum 12 months  
Cumulative unrealized loss on cash flow derivative instruments in accumulated other comprehensive loss $ (5.8) $ 2.9