Fair Value Measurements - Other Hedges (Details) (USD $) In Millions, unless otherwise specified			3 Months Ended		9 Months Ended																		3 Months Ended		9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 Foreign currency forward contracts	Sep. 30, 2011 Foreign currency forward contracts	Sep. 30, 2012 Foreign currency forward contracts	Sep. 30, 2011 Foreign currency forward contracts	Sep. 30, 2012 Other Current Assets	Dec. 31, 2011 Other Current Assets	Sep. 30, 2012 Other Current Liabilities	Dec. 31, 2011 Other Current Liabilities	Sep. 30, 2012 Hedges designated as hedging instruments Cash flow hedges	Dec. 31, 2011 Hedges designated as hedging instruments Cash flow hedges	Sep. 30, 2012 Hedges designated as hedging instruments Cash flow hedges Other Current Assets	Dec. 31, 2011 Hedges designated as hedging instruments Cash flow hedges Other Current Assets	Sep. 30, 2012 Hedges designated as hedging instruments Cash flow hedges Other Current Liabilities	Dec. 31, 2011 Hedges designated as hedging instruments Cash flow hedges Other Current Liabilities	Sep. 30, 2012 Other hedges not receiving hedge accounting	Dec. 31, 2011 Other hedges not receiving hedge accounting	Sep. 30, 2012 Other hedges not receiving hedge accounting Other Current Assets	Dec. 31, 2011 Other hedges not receiving hedge accounting Other Current Assets	Sep. 30, 2012 Other hedges not receiving hedge accounting Other Current Liabilities	Dec. 31, 2011 Other hedges not receiving hedge accounting Other Current Liabilities	Sep. 30, 2012 Other Expense	Sep. 30, 2011 Other Expense	Sep. 30, 2012 Other Expense	Sep. 30, 2011 Other Expense
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign Currency Transaction Loss, before Tax																							$ 0.1	$ 2.7	$ 1.8	$ 4.6
Loss on foreign currency contracts			0.1	4.2	0.2	4.3
Notional Amount	212.2	241.1									160.8	208.2					51.4	32.9
Derivative assets fair value							2.4	3.4					2.4	3.4					0	0
Derivative liabilities fair value									$ (1.9)	$ (1.4)					$ (1.9)	$ (1.4)					$ 0	$ 0