Discontinued Operations (Details) - Schedule of operating results of the discontinued operations (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2013	Nov. 30, 2012
Schedule of operating results of the discontinued operations [Abstract]
Revenues	$ 0.1	$ 2.7	$ 0.1	$ 2.9
Earnings (loss) before income taxes	0	(1.3)	0.3	(1.9)
Income tax benefit (provision)	0	0.5	(0.1)	0.7
Earnings (loss) from discontinued operations, net of tax	$ 0	$ (0.8)	$ 0.2	$ (1.2)

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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