Investment Income, Net (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
May. 31, 2015 |
Feb. 28, 2015 |
Nov. 30, 2014 |
Aug. 31, 2014 |
May. 31, 2014 |
Feb. 28, 2014 |
Nov. 30, 2013 |
Aug. 31, 2013 |
May. 31, 2015 |
May. 31, 2014 |
May. 31, 2013 |
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| Investment Income, Net [Abstract] | |||||||||||
| Interest income on corporate funds | $ 7.8 | $ 6.9 | $ 6.7 | ||||||||
| Interest expense | (0.7) | (1.1) | (0.1) | ||||||||
| Net loss from equity-method Investments | (0.7) | (0.4) | 0.0 | ||||||||
| Investment income, net | $ 2.0 | $ 1.6 | $ 1.4 | $ 1.4 | $ 1.4 | $ 1.5 | $ 1.3 | $ 1.2 | $ 6.4 | $ 5.4 | $ 6.6 |
| X | ||||||||||
- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Interest expense on all other items not previously classified. For example, includes dividends associated with redeemable preferred stock of a subsidiary that is treated as a liability in the parent's consolidated balance sheet. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The net amount of nonoperating interest income (expense). No definition available.
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- References No definition available.
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- Definition The aggregate amount of income from investments (for example, dividends) not considered a component of the entity's core operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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