Revenue Recognition (Details 1) (USD $) In Millions	9 Months Ended
	Sep. 30, 2011	Dec. 31, 2010
Summary of total product revenue reserves included in consolidated balance sheets
Reduction of accounts receivable	$ 40.3	$ 36.7
Current liability	119.2	105.3
Total reserves	159.5	142.0
Revenue Recognition (Textuals) [Abstract]
Reserves for contractual adjustments	$ 9.9