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Goodwill and Other Intangibles - Narrative (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 31, 2024 | Aug. 31, 2023 | May 31, 2024 | May 31, 2023
Goodwill [Line Items] |  |  |  |
Additions |  | $ 0 | $ 0 |
Goodwill, Impairment Loss | $ 0 | 0 | 0 |
Amortizable intangible assets acquired | $ 85,300,000 | 0 | 6,000,000.0 |
Useful life | 9 years |  |  |
Impairment of Intangible Assets, Finite-Lived |  |  | 3,100,000 |
Impairment of intangible assets (excluding goodwill) | $ 0 | $ 0 |  |
Amortizable Intangible Assets - Educational Programs |  |  |  |
Goodwill [Line Items] |  |  |  |
Amortizable intangible assets acquired |  |  | $ 5,800,000 |
Useful life |  |  | 8 years |
Amortizable Intangible Assets - Children's Book Publishing Business |  |  |  |
Goodwill [Line Items] |  |  |  |
Amortizable intangible assets acquired |  |  | $ 200,000 |
Useful life |  |  | 5 years |
9 Story Media Group Inc. |  |  |  |
Goodwill [Line Items] |  |  |  |
Additions | 70,100,000 |  |  |
Amortizable intangible assets acquired | $ 85,300,000 |  |  |
Learning Ovations, Inc. |  |  |  |
Goodwill [Line Items] |  |  |  |
Amortizable intangible assets acquired |  |  |  | $ 4,100,000

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