Investments (Details) - Schedule of cost and equity method investments (USD $) In Millions, unless otherwise specified	Nov. 30, 2013	May 31, 2013	Nov. 30, 2012
Cost method investments:
Cost method investments	$ 4.8	$ 5.0	$ 5.6
Equity method investments:
Equity method investments	18.9	14.6	17.3
Total	23.7	19.6	22.9
UK Non-controlling [Member]
Cost method investments:
Cost method investments	4.8	5.0	5.6
UK Equity-method [Member]
Equity method investments:
Equity method investments	17.9	14.6	17.3
Software Development Business [Member]
Equity method investments:
Equity method investments	$ 1.0

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- Definition

Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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- Definition

Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

+ References

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