Collaborative and Other Relationships (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Acorda
Summary of activity related to collaboration with Acorda
Total upfront and milestone payments made to Acorda	$ 0	$ 0	$ 25.0
Total cost of sales related to royalties and commercial supply reflected within our consolidated statements of income	$ 24.3	$ 20.2	$ 6.5
GAZYVA [Member]
Collaborative arrangements and non-collaborative arrangement transactions
Percentage Of Co Promotion Operating Profits Greater Than First Fifty Million Option Two Sub Option Two	37.50%