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Investments (Details) - USD ($)	12 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2021
Investments (Details) [Line Items]
Investments	$ 37,600,000	$ 37,000,000.0
Income from equity investments	900,000	2,000,000.0	$ 7,400,000
Proceeds from Dividends Received		1,400,000
Financing and Production Company
Investments (Details) [Line Items]
Impairment of investments	0
Other Investments
Investments (Details) [Line Items]
Investments	$ 100,000	100,000
Financing and Production Company | Financing and Production Company
Investments (Details) [Line Items]
Percent ownership in financing and production company	4.60%
International Segment
Investments (Details) [Line Items]
Equity method investments	$ 31,600,000	31,000,000.0
International Segment | U.K. Book Publishing Business
Investments (Details) [Line Items]
Ownership percentage	26.20%
Children's Book Publishing and Distribution | Other Cost Method Investments
Investments (Details) [Line Items]
Investments	$ 6,000,000.0	$ 6,000,000.0

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