Income Taxes (Reconciliation of Gross Unrecognized Tax Benefits, Not Including Interest or Other Potential Offsetting Effects) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
May 31, 2018 |
May 31, 2017 |
May 31, 2016 |
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| Income Taxes [Abstract] | |||
| Balance as of beginning of fiscal year | $ 43.7 | $ 64.7 | $ 39.9 |
| Additions for tax positions of the current year | 2.3 | 8.2 | 7.3 |
| Additions for tax positions of prior years | 0.1 | 4.8 | 20.7 |
| Reductions for tax positions of prior years | (1.2) | (2.5) | (0.1) |
| Settlements with tax authorities | (28.6) | (29.5) | (2.2) |
| Expiration of the statute of limitations | (1.4) | (2.0) | (0.9) |
| Balance as of end of fiscal year | $ 14.9 | $ 43.7 | $ 64.7 |
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- References No definition available.
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- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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