Fair Value Measurements (Details 2) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Summary of fair and carrying value of debt instruments
Notes payable, Carrying Value	$ 1,064.0	$ 1,077.7
Total	1,173.4	1,135.8
Dompe [Member]
Summary of fair and carrying value of debt instruments
Notes payable, Fair Value	0	8.1
Notes payable, Carrying Value	0	8.0
Notes Payable to Fumedica [Member]
Summary of fair and carrying value of debt instruments
Notes payable, Fair Value	23.4	24.2
Notes payable, Carrying Value	20.5	22.0
6.0% Senior Notes due 2013 [Member]
Summary of fair and carrying value of debt instruments
Notes payable, Fair Value	479.5	485.5
Notes payable, Carrying Value	449.8	449.8
6.875% Senior Notes due 2018 [Member]
Summary of fair and carrying value of debt instruments
Notes payable, Fair Value	670.5	618.0
Notes payable, Carrying Value	$ 593.7	$ 597.9