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Shareholders' Equity - Stock-based Compensation Expense (Details) - 2014 Incentive Plan - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 27, 2024 | Jan. 28, 2023 | Jan. 27, 2024 | Jan. 28, 2023
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense | $ (2.1) | $ 2.7 | $ 1.8 | $ 9.4
RSUs | Management |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense | $ (2.1) | $ 2.7 | 0.2 | 7.8
RSUs | Non-employee Directors |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense |  |  | 0.6 | 0.6
RSUs | Deferred Non-Employee Director Awards |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense |  |  | $ 1.0 | $ 1.0

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