Commitments and Contingencies (Commitments and Loss Contingency) (Details) (USD $) In Millions, unless otherwise specified			3 Months Ended		3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 INTUNIV	Mar. 31, 2013 Settlement costs related to agreement in principle to resolve a civil subpoena	Mar. 31, 2013 Settlement costs related to ADDERALL XR supply agreement dispute	Mar. 31, 2013 Clinical Testing	Dec. 31, 2012 Clinical Testing	Mar. 31, 2013 Contract Manufacturing	Dec. 31, 2012 Contract Manufacturing	Dec. 31, 2013 Other Purchasing Commitment	Mar. 31, 2013 Other Purchasing Commitment	Dec. 31, 2012 Other Purchasing Commitment	Mar. 31, 2013 Investment Commitment	Dec. 31, 2012 Investment Commitment	Mar. 31, 2013 Capital Commitment	Dec. 31, 2012 Capital Commitment
Commitment [Line Items]
Commitment amount						$ 451.7	$ 424.7	$ 101.3	$ 125.2		$ 136.5	$ 144.7	$ 12.5	$ 15.2	$ 142.5	$ 97.0
Commitments expected to be paid in next year										133.6
Legal Matters [Line Items]
Provisions for litigation loss, insurance claims and other disputes	80.3	130.5		57.5
Cash payment to Impax					$ 48.0
Settlement of litigation			Payment of a royalty of 25% of gross profits