Amount of assets held-for-sale that are not part of a disposal group.

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Basis of Presentation - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 30, 2022	Nov. 30, 2021	Nov. 30, 2022	Nov. 30, 2021
Long Lived Assets Held-for-sale [Line Items]
(Gain) loss on sale of assets	$ 0.0	$ 6.2	$ 0.0	$ 6.2
Long Lived Assets Held-for-sale, Description	no
Lake Mary
Long Lived Assets Held-for-sale [Line Items]
Assets held-for-sale		4.2		$ 4.2
Land, Buildings and Improvements
Long Lived Assets Held-for-sale [Line Items]
Proceeds from sale		10.4
(Gain) loss on sale of assets		$ 6.2
Make Believe Ideas Limited (MBI) \| Scholastic, Inc.
Long Lived Assets Held-for-sale [Line Items]
Ownership percentage	95.00%		95.00%
Make Believe Ideas Limited (MBI) \| Founder and CEO of MBI
Long Lived Assets Held-for-sale [Line Items]
Ownership percentage by founder and CEO of MBI	5.00%		5.00%