Financial Instruments (Details 3) (USD $) In Millions, unless otherwise specified				12 Months Ended
	Dec. 31, 2012 BRAE	Dec. 31, 2011 BRAE	Apr. 30, 2010 BRAE	Dec. 31, 2012 Tekmar	Dec. 31, 2012 Contingent consideration
Reconciliation of changes in fair value of all financial assets and liabilities
Balance at the beginning of the period	$ 0.2	$ 1.1			$ 1.1
Purchases, sales, settlements, net					5.1
Total realized and unrealized gains (losses) included in Earnings					(1.0)
Balance at the ending of the period	0.2	1.1			5.2
Contingent liability of the acquisition date fair value				5.1
Contingent liability in case of failure to meet the performance metrics			0	0
Contingent liability in case of complete achievement of performance metrics			4.8	8.2
Decrease in fair value of contingent consideration obligations				$ 0.1