Derivative Instruments and Hedging Activities (Fair Value of Derivative Instruments Outstanding) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Derivatives designated as hedges, asset		$ 93.1
Derivatives designated as hedges, liability		0
Derivatives not designated as hedges, asset	0.3	6.6
Derivatives not designated as hedges, liability	5.3	3.2
Total derivatives, asset	0.3	99.7
Total derivatives, liability	5.3	3.2
Interest-Rate Swap Agreements [Member] | Prepaid Expenses and Other [Member]
Derivatives not designated as hedges, asset		1.7
Interest-Rate Swap Agreements [Member] | Other Assets [Member]
Derivatives designated as hedges, asset		93.1
Interest-Rate Swap Agreements [Member] | Other Liabilities [Member]
Derivatives designated as hedges, liability		0
Interest-Rate Swap Agreements [Member] | Accounts Payable [Member]
Derivatives not designated as hedges, liability		1.7
Foreign Exchange Forward Contracts [Member] | Prepaid Expenses and Other [Member]
Derivatives not designated as hedges, asset	0.3	4.9
Foreign Exchange Forward Contracts [Member] | Accounts Payable [Member]
Derivatives not designated as hedges, liability	$ 5.3	$ 1.5