Financial Instruments and Fair Value Measurement (Measurement Inputs) (Details) (Recurring basis, USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Quoted Price in Active Markets for Identical Assets (Level 1)
    
Assets:    
Purchased currency options $ 967.1 $ 1,051.3
Interest rate swaps 0 0
Purchased currency options 0 0
Interest Rate Derivative Assets, at Fair Value 0 0
Total assets 967.1 1,051.3
Liabilities:    
Contingent value rights (128.5) (136.3)
Written currency options 0 0
Other acquisition related contingent consideration 0 0
Total liabilities (128.5) (136.3)
Significant Other Observable Inputs (Level 2)
    
Assets:    
Purchased currency options 1,978.7 2,373.8
Interest rate swaps 901.8 550.7
Purchased currency options 25.3 9.8
Interest Rate Derivative Assets, at Fair Value 32.8 20.0
Total assets 2,938.6 2,954.3
Liabilities:    
Contingent value rights 0 0
Written currency options (3.8) (4.6)
Other acquisition related contingent consideration 0 0
Total liabilities (3.8) (4.6)
Significant Unobservable Inputs (Level 3)
    
Assets:    
Purchased currency options 0 0
Interest rate swaps 0 0
Purchased currency options 0 0
Interest Rate Derivative Assets, at Fair Value 0 0
Total assets 0 0
Liabilities:    
Contingent value rights 0 0
Written currency options 0 0
Other acquisition related contingent consideration (1,305.8) (1,279.0)
Total liabilities (1,305.8) (1,279.0)
Fair Value    
Assets:    
Purchased currency options 2,945.8 3,425.1
Interest rate swaps 901.8 550.7
Purchased currency options 25.3 9.8
Interest Rate Derivative Assets, at Fair Value 32.8 20.0
Total assets 3,905.7 4,005.6
Liabilities:    
Contingent value rights (128.5) (136.3)
Written currency options (3.8) (4.6)
Other acquisition related contingent consideration (1,305.8) (1,279.0)
Total liabilities $ (1,438.1) $ (1,419.9)