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Asset Write Down (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
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May 31, 2024 | May 31, 2023 | May 31, 2022
Asset Write Down [Line Items] |  |  |
Asset impairments and write downs | $ 10.0 | $ 0.0 | $ 0.4
Operating lease, impairment loss | 3.9 |  |
Operating lease right-of-use assets, net | 99.1 | 85.7 |
Assets held for sale |  |  | 3.7
Gain (Loss) on assets held for sale | $ 0.0 | $ 0.0 | $ (15.1)
Loss on assets held for sale, impact on earnings per share, basic | $ 0.25 |  | $ 0.33
Loss on assets held for sale, impact on earnings per share, diluted | $ 0.25 |  | $ 0.32
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration] | Asset impairments and write downs |  |
Education Solutions |  |  |
Asset Write Down [Line Items] |  |  |
Asset impairments and write downs | $ 6.1 |  |
Overhead |  |  |
Asset Write Down [Line Items] |  |  |
Operating lease right-of-use assets, net | 2.3 |  |
International |  |  |
Asset Write Down [Line Items] |  |  |
Operating lease right-of-use assets, net | 1.1 |  |
Children's Book Publishing and Distribution |  |  |
Asset Write Down [Line Items] |  |  |
Operating lease right-of-use assets, net | $ 0.5 |  |

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482130/360-10-45-4 + Details
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- Definition Amount of assets held-for-sale that are not part of a disposal group, expected to be sold within a year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481372/852-10-55-10 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 15 -Paragraph 4 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482309/360-10-15-4 + Details
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