Divestment of Product Rights (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Sale of Other Assets [Line Items]
Gain on disposal of product rights	$ (6.0)	$ 16.5	$ 6.3
DAYTRANA
Sale of Other Assets [Line Items]
Gain on change in the fair value of divestiture contingent consideration receivable	(6.0)	10.4
Current divestiture contingent consideration receivable	13.7	21.6
Noncurrent divestiture contingent consideration receivable	28.9	43.7
Total divestiture contingent consideration receivable	$ 42.6	$ 65.3