Fair Value Measurements Unobservable Inputs Rollforward (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Business Combination, Contingent Consideration, Liability	$ 7.2		$ 7.2		$ 24.3
Adjustment to contingent consideration fair value	(17.3)	0	17.3	0
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance			2.0	0.7
Total realized/unrealized gains (losses) Included in other comprehensive income	1.8	1.1
Ending balance	3.8	1.8	3.8	1.8
Foreign Currency Transaction Gain (Loss), Unrealized	$ 0.2