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Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Aug. 31, 2025 | Aug. 31, 2024
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 225.6 | $ 237.2
Segment Reporting, Reconciling Item, Corporate Nonsegment |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 3.1 | 2.7
Total Children's Book Publishing and Distribution | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 109.4 | 105.4
Total Children's Book Publishing and Distribution | Operating Segments | Book Clubs - U.S. |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 1.8 | 2.7
Total Children's Book Publishing and Distribution | Operating Segments | Book Fairs - U.S. |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 34.1 | 28.8
Total Children's Book Publishing and Distribution | Operating Segments | Trade - U.S. |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 61.2 | 58.2
Total Children's Book Publishing and Distribution | Operating Segments | Trade - International |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 12.3 | 15.7
Total Education Solutions | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 40.1 | 55.7
Total Entertainment | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 13.6 | 16.6
Total Entertainment | Operating Segments | Entertainment - U.S. |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 1.4 | 1.6
Total Entertainment | Operating Segments | Entertainment - International |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 12.2 | 15.0
Total International | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 59.4 | 56.8
Total International | Operating Segments | Major Markets |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 48.9 | 48.1
Total International | Operating Segments | Other Markets |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 10.5 | $ 8.7

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