Financial Instruments and Derivative Instruments (Details 2) (USD $) In Millions, unless otherwise specified				6 Months Ended		6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jul. 01, 2012	Jun. 30, 2013 Tekmar	Jan. 31, 2012 Tekmar	Jun. 30, 2013 Contingent consideration
Reconciliation of changes in fair value of all financial assets and liabilities
Balance at the beginning of the period						$ 5.2
Purchases, sales, settlements, net						(1.2)
Total realized and unrealized (gains) losses included in Earnings						0.1
Total realized and unrealized (gains) losses included in Comprehensive income						(0.3)
Balance at the ending of the period						3.8
Contingent liability of the acquisition date fair value					5.1
Contingent liability in case of failure to meet the performance metrics					0
Contingent liability in case of complete achievement of performance metrics					8.2
Portion of contingent consideration paid on achievement of performance metrics			17.5	1.2
Increase in fair value of contingent liability based on performance metrics achieved				0.1
Short-term investment securities	$ 0	$ 2.1