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Investments - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Feb. 28, 2026 | Nov. 30, 2025 | Feb. 28, 2025 | Feb. 28, 2026 | Feb. 28, 2025 | Jun. 20, 2024
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |  |  |
Equity Securities without readily determinable fair value, impairment loss | $ 0.0 |  |  | $ 0.0 |  |
Income (loss) from equity method investments | $ 0.1 |  | $ (0.1) | $ 0.4 | $ 0.8 |
9 Story Media Group Inc. |  |  |  |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |  |  |
Equity method and other investments |  |  |  |  |  | $ 0.9
Financing and Production Company | Financing and Production Company |  |  |  |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |  |  |
Other equity percentage |  |  |  | 4.60% |  |
UK Children's Book Publishing |  |  |  |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |  |  |
Equity Securities without readily determinable fair value, impairment loss |  | $ 0.3 |  |  |  |
Other equity investments, percentage acquired |  | 12.00% |  |  |  |
Animated Television Production Companies |  |  |  |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |  |  |
Equity method ownership percentage |  |  |  |  |  | 50.00%
UK Book Publishing Business |  |  |  |  |  |
Debt and Equity Securities, FV-NI [Line Items] |  |  |  |  |  |
Equity method ownership percentage | 26.20% |  |  | 26.20% |  |

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