Financial Instruments and Risk Management (Derivatives Designated As Hedging Instruments Fair Values of Derivative Instruments) (Details) (Designated as Hedging Instruments, USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 116.1	$ 183.4
Liability Derivatives, Fair Value	4.7	68.9
Prepaid expenses and other current assets | Interest rate swaps
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	61.1	90.3
Other assets | Interest rate swaps
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	55.0	93.1
Other current liabilities | Interest rate swaps
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	0.4	15.8
Other current liabilities | Foreign currency forward contracts
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	$ 4.3	$ 53.1