v2.4.0.8
Derivative Instruments (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
 6 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Jun. 30, 2014
Not Designated [Member]
Jun. 30, 2013
Not Designated [Member]
Jun. 30, 2014
Not Designated [Member]
Jun. 30, 2013
Not Designated [Member]
Jun. 30, 2014
Foreign Exchange [Member]
Cash Flow Hedges [Member]
Jun. 30, 2014
Foreign Exchange [Member]
Not Designated [Member]
Derivative Instruments, Gain (Loss) [Line Items]                
Net assets associated with foreign currency derivatives $ 17.0 $ 1.8            
Maturity period of derivatives (in months) 18 months              
Aggregate cash flow hedges outstanding             372.2 233.7
Cash flow hedges outstanding for British pounds             187.0 37.1
Cash flow hedges outstanding for Brazilian reals             91.4  
Cash flow hedges outstanding for Singapore dollars             39.5  
Cash flow hedges outstanding for Australian dollars             22.2 14.5
Cash flow hedges outstanding for Indonesian rupiah               17.4
Cash flow hedges outstanding for euros             20.9 111.0
Cash flow hedges outstanding for Swiss francs               25.2
Cash flow hedges outstanding for other currencies             11.2 28.5
Net gains on derivatives not designated as hedging instruments     0.9 (0.3) 0.3 (4.7)    
Estimated amount of net gains associated with derivative instruments, net of tax $ 6.7