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v3.22.2.2

Investments (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Nov. 30, 2022 | Nov. 30, 2021 | Nov. 30, 2022 | Nov. 30, 2021 | May 31, 2022
Investments (Details) [Line Items] |  |  |  |  |
Investments | $ 37,000,000.0 | $ 39,700,000 | $ 37,000,000.0 | $ 39,700,000 | $ 37,000,000.0
Equity method investment, impairment |  |  | 0 |  |
Income from equity-method investments | 1,200,000 | 500,000 | 1,300,000 | 1,600,000 |
Post-Retirement Benefits |  |  |  |  |
Investments (Details) [Line Items] |  |  |  |  |
Interest cost | 100,000 | 0.0 | 200,000 | 100,000 |
Expected return on assets | 0 | 0 | 0 | 0 |
Net amortization of prior service credit | (200,000) | (200,000) | (400,000) | (400,000) |
Amortization of pension and postretirement plans | 0 | (0.0) | 0 | 0 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | (100,000) | (200,000) | (200,000) | (300,000) |
Foreign Plan | Pension Plans |  |  |  |  |
Investments (Details) [Line Items] |  |  |  |  |
Interest cost | 200,000 | 300,000 | 500,000 | 500,000 |
Expected return on assets | (300,000) | (300,000) | (600,000) | (600,000) |
Net amortization of prior service credit | 0.0 | 0.0 | 0.0 | 0.0 |
Amortization of pension and postretirement plans | 100,000 | 200,000 | 200,000 | 400,000 |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | $ 0.0 | 200,000 | $ 100,000 | 300,000 |
Children's Book Publishing and Distribution |  |  |  |  |
Investments (Details) [Line Items] |  |  |  |  |
Equity method ownership percentage | 26.20% |  | 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 | $ 31,000,000.0 | 33,700,000 | $ 31,000,000.0 | 33,700,000 | 31,000,000.0
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 | $ 6,000,000.0 | $ 6,000,000.0

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