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Fair Value Measurements (Details 2) (USD $)
In Millions, unless otherwise specified |
Sep. 30, 2012
|
Dec. 31, 2011
|
|---|---|---|
| Summary of fair and carrying value of debt instruments | ||
| Notes payable, Carrying Value | $ 1,055.1 | $ 1,061.9 |
| Notes payable, Fair Value | 1,144.9 | 1,160.4 |
|
Notes Payable to Fumedica [Member]
|
||
| Summary of fair and carrying value of debt instruments | ||
| Notes payable, Fair Value | 18.9 | 22.4 |
| Notes payable, Carrying Value | 17.2 | 19.7 |
|
6.0% Senior Notes due 2013 [Member]
|
||
| Summary of fair and carrying value of debt instruments | ||
| Notes payable, Fair Value | 459.6 | 474.1 |
| Notes payable, Carrying Value | 450.0 | 449.9 |
|
6.875% Senior Notes due 2018 [Member]
|
||
| Summary of fair and carrying value of debt instruments | ||
| Notes payable, Fair Value | 666.4 | 663.9 |
| Notes payable, Carrying Value | $ 587.9 | $ 592.3 |