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Accumulated Other Comprehensive Income/(Loss) (Tables) | 3 Months Ended
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Aug. 31, 2014
Equity [Abstract] |
Changes in accumulated other comprehensive income/(loss) | The changes in accumulated other comprehensive income/(loss) are as follows:
|  | For the three months ended August 31,
In millions |  | 2014 |  | 2013
Beginning balance |  | $ | 21.5 |  |  | $ | 22.0 |
Other comprehensive income/(loss): |  |  |  |
Unrealized gains/(losses) on available-for-sale securities, net of tax |  | 4.6 |  |  | (26.8 | )
Reclassification adjustment for the net gain on sale of available-for-sale securities realized in net income, net of tax |  | (0.1 | ) |  | (0.1 | )
Total other comprehensive income/(loss), net of tax |  | 4.5 |  |  | (26.9 | )
Ending balance |  | $ | 26.0 |  |  | $ | (4.9 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 + Details
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