Litigation (Details) In Millions, unless otherwise specified		3 Months Ended			12 Months Ended	3 Months Ended
	Jun. 08, 2010 USD ($)	Mar. 31, 2013 Hoechst [Member] USD ($)	Mar. 31, 2013 Hoechst [Member] EUR (€)	Jun. 30, 2011 Hoechst [Member] USD ($)	Dec. 31, 2008 Canada Lease Dispute [Member] USD ($)	Dec. 31, 2011 ITALY EUR (€)	Jun. 30, 2013 ITALY EUR (€)
Loss Contingencies [Line Items]
Notice of Assessment under consideration for corporate excise tax	$ 103.5
Compensatory damages and interest			108.0		7.0
Prejudgment interest			54
Decrease in share of co-promotion revenue due to estimated damages and interest		41.5		50.0
Payment in case of any unfavorable determination received						30.7
Limited period for government reimbursement						24 months
Automatic renewal period for the resolution						24 months
Reimbursement limit stated in the resolution						24 months
Loss contingency, expected settlement							33.3
Plaintiffs estimated expert report of damages					2.5
Cost seeks for damages					$ 0.4