Financial Instruments and Risk Management (Effect of Derivative Instruments on the Condensed Consolidated Balance Sheets Fair Value of Derivative Instruments Derivatives Designated As Hedging Instruments) (Details) - Designated as Hedging Instrument - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Asset derivatives, fair value	$ 93.6	$ 44.7
Liability derivatives, fair value	1.7	10.5
Prepaid expenses and other current assets | Interest rate swaps
Derivatives, Fair Value [Line Items]
Asset derivatives, fair value	66.4	36.3
Prepaid expenses and other current assets | Foreign exchange forward contracts
Derivatives, Fair Value [Line Items]
Asset derivatives, fair value	27.2	8.4
Other current liabilities | Interest rate swaps
Derivatives, Fair Value [Line Items]
Liability derivatives, fair value	$ 1.7	$ 10.5