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Income Taxes and Other Taxes (Details) - state | 3 Months Ended | 9 Months Ended
--- | --- | ---
Feb. 29, 2020 | Feb. 29, 2020 | Feb. 28, 2019
Income Tax And Non Income Tax Disclosure [Abstract] |  |  |
Effective income tax rate (percentage) | 28.00% | 27.40% |
Children's Book Publishing and Distribution |  |  |
Loss Contingencies [Line Items] |  |  |
Number of states in which sales tax remitted (in states) |  | 44 | 38

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