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Goodwill and Other Intangibles (Tables) | 3 Months Ended
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Aug. 31, 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:
| Three months ended August 31, |  | Twelve months ended May 31, |  | Three months ended August 31,
| 2018 |  | 2018 |  | 2017
Gross beginning balance | $ | 158.8 |  |  | $ | 158.5 |  |  | $ | 158.5 |
Accumulated impairment | (39.6 | ) |  | (39.6 | ) |  | (39.6 | )
Beginning balance | $ | 119.2 |  |  | $ | 118.9 |  |  | $ | 118.9 |
Foreign currency translation | (0.1 | ) |  | 0.2 |  |  | 0.3 |
Other | — |  |  | 0.1 |  |  | — |
Ending balance | $ | 119.1 |  |  | $ | 119.2 |  |  | $ | 119.2 |
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:
| Three months ended August 31, |  | Twelve months ended May 31, |  | Three months ended August 31,
| 2018 |  | 2018 |  | 2017
Beginning balance other intangibles subject to amortization | $ | 10.1 |  |  | $ | 9.0 |  |  | $ | 9.0 |
Additions | 0.5 |  |  | 3.3 |  |  | 0.1 |
Amortization expense | (0.7 | ) |  | (2.1 | ) |  | (0.5 | )
Foreign currency translation | 0.0 |  |  | (0.1 | ) |  | — |
Total other intangibles subject to amortization, net of accumulated amortization of $24.8, $24.1 and $22.5, respectively | $ | 9.9 |  |  | $ | 10.1 |  |  | $ | 8.6 |
Total other intangibles not subject to amortization | $ | 2.1 |  |  | $ | 2.1 |  |  | $ | 2.1 |
Total other intangibles | $ | 12.0 |  |  | $ | 12.2 |  |  | $ | 10.7 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267 + Details
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