Commitments and Contingencies (Collaborative Arrangements) (Details) (Out-licensing Arrangement, USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Out-licensing arrangements
Milestone payments received	$ 0	$ 6.0
Other Revenues
Out-licensing arrangements
Milestone revenues recognized	0.5	5.5
Product Sales
Out-licensing arrangements
Milestone revenues recognized	14.5	19.1
Development Milestone
Out-licensing arrangements
Maximum milestone payment receivable	39.0
Sales Milestone
Out-licensing arrangements
Maximum milestone payment receivable	$ 67.0

Cash received from collaborators during the current period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 27

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3536-108585

Name:	us-gaap_ProceedsFromCollaborators
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration