|
Credit Risk Related Contingent Features (Details) (USD $)
In Millions, unless otherwise specified |
Mar. 31, 2015
|
Dec. 31, 2014
|
|---|---|---|
| Derivative, Credit Risk Related Contingent Features [Abstract] | ||
| The aggregate fair value of all derivative instruments with credit-risk-related contingent features that were in a liability position | $ 72.9 | $ 41.7 |
| Required collateral assets to be posted if the credit-risk contingent features of these underlying agreements were triggered | $ 72.0 |