Financial Instruments and Risk Management (Derivatives Not Designated As Hedging Instruments Fair Values of Derivative Instruments) (Details) (Not Designated as Hedging Instruments, USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 1,656.9	$ 1,309.4
Liability Derivatives, Fair Value	1,651.8	1,308.4
Prepaid expenses and other current assets | Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	6.6	6.4
Other assets | Purchased cash convertible note hedge
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	1,650.3	1,303.0
Other current liabilities | Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	1.5	5.4
Long-term debt | Cash conversion feature of Cash Convertible Notes
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	$ 1,650.3	$ 1,303.0