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Taxes (Details) - Schedule of earnings from continuing operations before income taxes - USD ($) $ in Millions | 12 Months Ended
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May 31, 2017 | May 31, 2016 | May 31, 2015
Taxes (Details) - Schedule of earnings from continuing operations before income taxes [Line Items] |  |  |
Earnings (loss) from continuing operations before income taxes | $ 87.9 | $ 68.7 | $ 29.9
United States [Member] |  |  |
Taxes (Details) - Schedule of earnings from continuing operations before income taxes [Line Items] |  |  |
Earnings (loss) from continuing operations before income taxes | 78.7 | 62.1 | 27.4
Non-United States [Member] |  |  |
Taxes (Details) - Schedule of earnings from continuing operations before income taxes [Line Items] |  |  |
Earnings (loss) from continuing operations before income taxes | $ 9.2 | $ 6.6 | $ 2.5

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- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(10)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(15)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(8)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 + Details
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