Financial Instruments (Fair Value of Derivative Instruments) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Other Current Assets [Member]
Forward exchange contracts and options designated as hedging instruments, assets	$ 16.4	$ 13.0
Other Non-Current Assets [Member]
Forward exchange contracts and options designated as hedging instruments, assets	11.6	3.9
Other Current Liabilities [Member]
Forward exchange contracts and options designated as hedging instruments, liabilities	6.0	11.2
Other Long-Term Liabilities [Member]
Forward exchange contracts and options designated as hedging instruments, liabilities	$ 3.5	$ 8.1