Reserves for Discounts and Allowances (Details 1) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Summary of total product revenue reserves included in consolidated balance sheets
Reduction of accounts receivable	$ 48.2	$ 40.6
Component of accrued expenses and other	132.5	115.0
Total reserves	$ 180.7	$ 155.6