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Accumulated Other Comprehensive Income/(Loss) (Tables) | 12 Months Ended
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May 31, 2019
Accumulated Other Comprehensive Income/(Loss) [Abstract] |
Changes in Accumulated Other Comprehensive Income/(Loss) |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  | Year ended May 31,
﻿In millions |  | 2019 |  | 2018 |  | 2017
﻿Beginning balance |  | $ | (36.2) |  | $ | 20.0 |  | $ | 29.2
﻿Other comprehensive income/(loss): |  |  |  |  |  |  |  |  |
﻿Unrealized holding gains/(losses) |  |  | 58.2 |  |  | (70.2) |  |  | (14.7)
﻿Income tax (expense)/benefit related to unrealized holding gains/(losses) |  |  | (14.2) |  |  | 22.6 |  |  | 5.6
﻿Reclassification adjustment for the net gain on sale of available-for-sale securities realized in net income |  |  | — |  |  | — |  |  | (0.1)
﻿Foreign currency translation adjustment |  |  | (7.7) |  |  | (8.6) |  |  | —
﻿Total other comprehensive income/(loss), net of tax |  |  | 36.3 |  |  | (56.2) |  |  | (9.2)
﻿Ending balance |  | $ | 0.1 |  | $ | (36.2) |  | $ | 20.0
﻿ |  |  |  |  |  |  |  |  |
﻿Total tax expense/(benefit) included in other comprehensive income/(loss) |  | $ | 14.2 |  | $ | (22.6) |  | $ | (5.6)
﻿

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 + Details
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