Derivative Instruments and Hedging Activities (Fair Value of Derivative Instruments Outstanding) (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	$ 9.8	$ 21.0
Derivative Asset Designated as Hedging Instrument, Fair Value	133.3	135.9
Derivative Liability Designated as Hedging Instrument, Fair Value	15.0	14.2
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	15.0	14.2
Interest-Rate Swap Agreements [Member] | Other Assets [Member]
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	8.8	9.9
Fair Value Hedge Assets	123.5	114.9
Interest-Rate Swap Agreements [Member] | Other Liabilities [Member]
Fair Value Hedge Liabilities	0	0
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	8.7	9.9
Foreign Exchange Forward Contracts [Member] | Accounts Payable [Member]
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	6.3	4.3
Foreign Exchange Forward Contracts [Member] | Prepaid Expenses and Other [Member]
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	$ 1.0	$ 11.1