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Investments (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Aug. 31, 2021 | Aug. 31, 2020 | May 31, 2021
Investments (Details) [Line Items] |  |  |
Investments | $ 40,400,000 | $ 33,900,000 | $ 40,300,000
Income from equity method investments | 1,100,000 | 800,000 |
Equity method investment, impairment | $ 0 |  |
Children's Book Publishing and Distribution |  |  |
Investments (Details) [Line Items] |  |  |
Equity method ownership percentage | 26.20% |  |
Financing and Production Company | Financing and Production Company |  |  |
Investments (Details) [Line Items] |  |  |
Other equity percentage | 4.60% |  |
International |  |  |
Investments (Details) [Line Items] |  |  |
Equity method investment | $ 34,400,000 | 27,900,000 | 34,300,000
Children's Book Publishing and Distribution | Other Investments |  |  |
Investments (Details) [Line Items] |  |  |
Investments | $ 6,000,000.0 | $ 6,000,000.0 | $ 6,000,000.0

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