Derivative Instruments and Hedging Activities (Fair Value and Presentation in the Balance Sheet) (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Derivatives, Fair Value [Line Items]    
Asset derivative, gross asset $ 1,047.7 $ 651.2
Derivative liability gross asset 91.6 75.3
Foreign currency forward contracts | Designated as hedging instruments | Other current assets    
Derivatives, Fair Value [Line Items]    
Asset derivative, gross asset 424.1 264.9
Derivative liability gross asset 57.2 44.9
Foreign currency forward contracts | Designated as hedging instruments | Other current liabilities    
Derivatives, Fair Value [Line Items]    
Derivative asset, gross liability 0.3 0.1
Derivative liability, gross liability 1.7 1.7
Foreign currency forward contracts | Designated as hedging instruments | Other non-current assets    
Derivatives, Fair Value [Line Items]    
Asset derivative, gross asset 529.4 322.3
Derivative liability gross asset 17.6 17.5
Interest rate swap contracts | Designated as hedging instruments | Other current assets    
Derivatives, Fair Value [Line Items]    
Asset derivative, gross asset 21.0 17.9
Derivative liability gross asset 0 0
Interest rate swap contracts | Designated as hedging instruments | Other non-current assets    
Derivatives, Fair Value [Line Items]    
Asset derivative, gross asset 21.7 4.8
Derivative liability gross asset 0 0.3
Interest rate swap contracts | Designated as hedging instruments | Other non-current liabilities    
Derivatives, Fair Value [Line Items]    
Derivative asset, gross liability 0 0
Derivative liability, gross liability 11.2 3.8
Interest rate swap contracts | Not designated as hedging instruments | Other current assets    
Derivatives, Fair Value [Line Items]    
Asset derivative, gross asset 0 0.1
Derivative liability gross asset 0 0
Interest rate swap contracts | Not designated as hedging instruments | Other non-current assets    
Derivatives, Fair Value [Line Items]    
Asset derivative, gross asset 1.3 1.3
Derivative liability gross asset 0 0
Foreign exchange contracts | Not designated as hedging instruments | Other current assets    
Derivatives, Fair Value [Line Items]    
Asset derivative, gross asset 49.8 39.7
Derivative liability gross asset 2.9 6.0
Foreign exchange contracts | Not designated as hedging instruments | Other current liabilities    
Derivatives, Fair Value [Line Items]    
Derivative asset, gross liability 0.1 0.1
Derivative liability, gross liability $ 1.0 $ 1.1