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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% |  |  |  |

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