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Goodwill and Other Intangibles (Tables) | 9 Months Ended
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Feb. 28, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Summary of Activity in Goodwill for the Periods Indicated | The following table summarizes the activity in Goodwill for the periods indicated:
| Nine months ended February 28, 2018 |  | Twelve months ended May 31, 2017 |  | Nine months ended February 28, 2017
Beginning balance | $ | 118.9 |  |  | $ | 116.2 |  |  | $ | 116.2 |
Additions | — |  |  | 2.8 |  |  | — |
Foreign currency translation | 0.2 |  |  | (0.1 | ) |  | (0.0 | )
Total goodwill | $ | 119.1 |  |  | $ | 118.9 |  |  | $ | 116.2 |
Summary of Activity in Total Other Intangibles for the Periods Indicated | The following table summarizes the activity in other intangibles included in “Other assets and deferred charges” on the Company’s condensed consolidated balance sheets for the periods indicated:
| Nine months ended February 28, 2018 |  | Twelve months ended May 31, 2017 |  | Nine months ended February 28, 2017
Beginning balance other intangibles subject to amortization | $ | 9.0 |  |  | $ | 4.7 |  |  | $ | 4.7 |
Additions | 1.5 |  |  | 7.0 |  |  | 0.2 |
Amortization expense | (1.6 | ) |  | (2.5 | ) |  | (1.8 | )
Foreign currency translation | 0.1 |  |  | (0.2 | ) |  | (0.2 | )
Total other intangibles subject to amortization, net of accumulated amortization of $23.6, $22.0 and $21.3, respectively | $ | 9.0 |  |  | $ | 9.0 |  |  | $ | 2.9 |
Total other intangibles not subject to amortization | $ | 2.1 |  |  | $ | 2.1 |  |  | $ | 2.1 |
Total other intangibles | $ | 11.1 |  |  | $ | 11.1 |  |  | $ | 5.0 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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