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Acquisitions (Details) - USD ($) $ in Millions |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 01, 2022 | Nov. 30, 2022 | Feb. 28, 2023 | Feb. 28, 2022 | May 31, 2022
Business Acquisition [Line Items] |  |  |  |  |
Acquired receivable, fair value | $ 0.1 |  |  |  |
Amortizable intangible assets acquired |  | $ 4.1 | $ 4.1 | $ 0.0 | $ 0.0
Goodwill acquired |  | $ 7.0 | $ 7.0 | $ 0.0 | $ 0.0
Learning Ovations, Inc. |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Percentage of interests acquired | 100.00% |  |  |  |
Payments to acquire businesses, net of cash acquired | $ 11.1 |  |  |  |
Net assets acquired | 4.2 |  |  |  |
Amortizable intangible assets acquired | 4.1 |  |  |  |
Goodwill acquired | $ 7.0 |  |  |  |
Learning Ovations, Inc. | Valuation Technique, Discounted Cash Flow |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business combination, discount rate | 0.175 |  |  |  |

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