Financial Instruments (Fair Value of Derivative Instruments) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Other Current Assets [Member]
Forward exchange contracts and options designated as hedging instruments, assets	$ 17.5	$ 13.0
Other Assets [Member]
Forward exchange contracts and options designated as hedging instruments, assets	6.8	3.9
Other Current Liabilities [Member]
Forward exchange contracts and options designated as hedging instruments, liabilities	8.6	11.2
Other Liabilities [Member]
Forward exchange contracts and options designated as hedging instruments, liabilities	$ 7.9	$ 8.1