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Revenue - Costs to Obtain a Contract (Details) - USD ($) $ in Millions | 12 Months Ended
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Apr. 30, 2025 | Apr. 30, 2024 | Apr. 30, 2023
Disaggregation of Revenue [Line Items] |  |  |
Costs to obtain and fulfill a contract, expense | $ 13.5 | $ 7.2 | $ 5.9
Capitalized contract cost, impairment loss | 0.0 | 0.0 | $ 0.0
Prepaid Expenses and Other Current Assets |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Costs to obtain and fulfill a contract | 7.1 | 7.0 |
Other Assets |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Costs to obtain and fulfill a contract | $ 7.9 | $ 11.0 |

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