Discontinued Operations (Details) - Schedule of operating results of the discontinued operations (USD $) In Millions, unless otherwise specified	3 Months Ended
Aug. 31, 2013	Aug. 31, 2012
Schedule of operating results of the discontinued operations [Abstract]
Revenues	$ 0	$ 0.2
Earnings (loss) before income taxes	0.3	(0.7)
Income tax benefit (provision)	(0.1)	0.3
Earnings (loss) from discontinued operations, net of tax	$ 0.2	$ (0.4)

Overall income (loss) from a disposal group that is classified as a component of the entity, before income tax, reported as a separate component of income before extraordinary items. Includes the following (before income tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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Tax effect allocated to a disposal group that is classified as a component of the entity reported as a separate component of income before extraordinary items. Includes the tax effects of the following: income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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