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Basis of Presentation - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2021	Nov. 30, 2020
Long Lived Assets Held-for-sale [Line Items]
(Gain) loss on sale of assets	$ 6.2	$ (0.0)	$ 6.2	$ 6.6
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%
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]
Assets held-for-sale		5.7		$ 5.7
Proceeds from sale	10.4	12.3
(Gain) loss on sale of assets	6.2	$ 6.6
Witney Facilities
Long Lived Assets Held-for-sale [Line Items]
Assets held-for-sale	$ 2.1		$ 2.1

X

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 15
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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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