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Acquisitions - Narrative (Details) - USD ($) $ in Millions |  |  |  | 11 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Jun. 20, 2024 | Jun. 01, 2023 | Sep. 01, 2022 | May 31, 2025 | May 31, 2025 | May 31, 2024 | May 31, 2023
Business Combination [Line Items] |  |  |  |  |  |  |
Additional paid-in capital |  |  |  | $ 607.1 | $ 607.1 | $ 604.6 |
Revenues |  |  |  |  | 1,625.5 | 1,589.7 | $ 1,704.0
Net income (loss) |  |  |  |  | (1.9) | 12.1 | 86.5
Business Combination, Acquisition-Related Cost, Expense |  |  |  |  | 3.0 | 9.3 |
Payments to acquire businesses, net of cash acquired |  |  |  |  | 176.2 | 6.4 | 10.7
Goodwill |  |  |  | 198.9 | 198.9 | 132.8 | 132.7
Payments to Acquire Additional Interest in Subsidiaries |  |  |  |  | 0.0 | 2.1 | $ 0.0
Education Solutions |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |
Goodwill |  |  |  | 75.7 | $ 75.7 | $ 75.7 |
9 Story Media Group Inc. |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |
Percentage of outstanding shares acquired | 100.00% |  |  |  |  |  |
Percentage of interests acquired | 25.00% |  |  |  |  |  |
Revenues |  |  |  | 58.0 |  |  |
Net income (loss) |  |  |  | $ 8.5 |  |  |
Accounts receivable | $ 14.8 |  |  |  |  |  |
Net assets acquired | 129.5 |  |  |  |  |  |
Goodwill | 64.2 |  |  |  |  |  |
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill | $ 193.7 |  |  |  |  |  |
9 Story Media Group Inc. | Intellectual Property and Customer Contracts/Relationships |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life | 10 years |  |  |  |  |  |
9 Story Media Group Inc. | Customer Relationships |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life | 5 years |  |  |  |  |  |
Other Intangible assets: | $ 51.5 |  |  |  |  |  |
9 Story Media Group Inc. | Trade Names |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life | 10 years |  |  |  |  |  |
Other Intangible assets: | $ 16.5 |  |  |  |  |  |
9 Story Media Group Inc. | Software Development |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life | 3 years |  |  |  |  |  |
Other Intangible assets: | $ 1.3 |  |  |  |  |  |
Learning Ovations, Inc. |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |
Payments to acquire businesses, net of cash acquired |  |  | $ 11.1 |  |  |  |
Accounts receivable |  |  | $ 0.1 |  |  |  |
Business combination, discount rate |  |  | 0.175 |  |  |  |
Net assets acquired |  |  | $ 3.6 |  |  |  |
Other Intangible assets: |  |  | 4.1 |  |  |  |
Deferred tax liabilities acquired |  |  | 0.6 |  |  |  |
Learning Ovations, Inc. | Education Solutions |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |
Goodwill |  |  | $ 7.6 |  |  |  |
Make Believe Ideas Limited (MBI) |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |
Noncontrolling interest, equity, carrying amount |  | $ 1.6 |  |  |  |  |
Adjustments to additional paid in capital |  | 0.5 |  |  |  |  |
Payments to Acquire Additional Interest in Subsidiaries |  | $ 2.1 |  |  |  |  |
Scholastic, Inc. | Learning Ovations, Inc. |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |
Percentage of interests acquired |  |  | 100.00% |  |  |  |
Scholastic, Inc. | Make Believe Ideas Limited (MBI) |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |
Noncontrolling interest, ownership percentage by parent |  | 100.00% |  |  |  |  | 95.00%

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