Fair Value Measurements (Details 1) - USD ($) $ in Millions |
Sep. 30, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Senior Notes Due 2023 | Senior Notes | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Notes Payable, Fair Value Disclosure | $ 385.0 | $ 0.0 |