Financial Instruments (Foreign Exchange Risk and Its Classification on Balance Sheet) (Details) (Foreign Exchange Contract, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 contract	Dec. 31, 2012 Prepaid expenses and other current assets	Dec. 31, 2011 Prepaid expenses and other current assets	Dec. 31, 2012 Other current liabilities	Dec. 31, 2011 Other current liabilities
Derivatives, Fair Value
Assets		$ 1.3	$ 3.4
Liabilities				3.0	0.4
Net derivative fair value	$ (1.7)
Number of swap and forward foreign exchange contracts outstanding	19
Swaps and forward contracts maturity	90 days