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Amount of gain (loss) from the difference between the sale price or salvage price and the book value of an asset that was sold or retired, and gain (loss) from the write down of assets from their carrying value to fair value.

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Basis of Presentation - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 28, 2023	Feb. 28, 2022	Feb. 28, 2023	Feb. 28, 2022	Nov. 30, 2022	Aug. 31, 2022	May 31, 2022
Long Lived Assets Held-for-sale [Line Items]
Assets held for sale	$ 0.0	$ 0.0	$ 0.0	$ 0.0	$ 0.0	$ 3.7	$ 3.7
(Gain) loss on sale of assets	$ 0.0	0.0	$ 0.0	6.2
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%