Business and Summary of Significant Accounting Policies (Accounting Pronouncements) (Details) $ in Millions	May 31, 2014 USD ($)
Deferred Revenue \| Accounting Standards Update 2014-09
Accounting Policies [Line Items]
Cumulative catch-up adjustment	$ 1.5

Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

No definition available.

Name:	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant