Basis of Presentation (Details) - Plan [Member] - New Accounting Pronouncement Early Adoption, Effect [Member] $ in Millions |
May. 31, 2015
USD ($)
|
|---|---|
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |
| Unamortized debt issuance costs reclassified from other assets | $ 1.4 |
| Unamortized debt issuance costs reclassified to long-term debt | $ 1.4 |