Financial Instruments and Risk Management (Derivatives Designated as Hedging Instruments Fair Values of Derivative Instruments) (Details) - Designated as hedging instrument - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 44.7	$ 43.3
Liability derivatives, fair value	10.5	49.9
Prepaid expenses and other current assets | Interest rate swaps
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	36.3	30.4
Prepaid expenses and other current assets | Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	8.4	12.9
Other current liabilities | Interest rate swaps
Derivatives, Fair Value [Line Items]
Liability derivatives, fair value	$ 10.5	$ 49.9