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Investment Income, Net (Tables) | 9 Months Ended
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Feb. 28, 2015
Investment Income, Net [Abstract] |
Schedule of Investment Income, Net [Table Text Block] | Investment income, net, consisted of the following items:
|  | For the three months ended February 28, |  | For the nine months ended February 28,
In millions |  | 2015 |  | 2014 |  | 2015 |  | 2014
Interest income on corporate funds |  | $ | 2.0 |  |  | $ | 1.9 |  |  | $ | 5.9 |  |  | $ | 5.2 |
Interest expense |  | (0.1 | ) |  | (0.2 | ) |  | (0.7 | ) |  | (1.0 | )
Net loss from equity-method investments |  | (0.3 | ) |  | (0.2 | ) |  | (0.8 | ) |  | (0.2 | )
Investment income, net |  | $ | 1.6 |  |  | $ | 1.5 |  |  | $ | 4.4 |  |  | $ | 4.0 |

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- Definition Tabular disclosure of the components of non-operating income or non-operating expense that may include amounts earned from dividends, interest on securities, gains (losses) on securities sold, equity earnings of unconsolidated affiliates, net gain (loss) on sales of business, interest expense and other miscellaneous income or expense items. + References No definition available. + Details
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