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Investment Income, Net (Tables) | 6 Months Ended
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Nov. 30, 2013
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 November 30, |  | For the six months ended November 30,
In millions |  | 2013 |  | 2012 |  | 2013 |  | 2012
Interest income on corporate funds |  | $ | 1.7 |  |  | $ | 1.9 |  |  | $ | 3.3 |  |  | $ | 3.9 |
Interest expense |  | (0.4 | ) |  | — |  |  | (0.8 | ) |  | (0.1 | )
Investment income, net |  | $ | 1.3 |  |  | $ | 1.9 |  |  | $ | 2.5 |  |  | $ | 3.8 |

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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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