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Shareholders' Equity - Stock-based Compensation Expense (Benefit) (Details) - 2014 Incentive Plan - USD ($) $ in Millions | 12 Months Ended
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Apr. 30, 2022 | May 01, 2021 | May 02, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Stock-based compensation expense | $ 11.8 | $ 6.8 | $ 0.3
RSAs | Management |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Stock-based compensation expense | 0.0 |  | (2.1)
RSAs | Director |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Stock-based compensation expense | 0.7 | 0.9 | 0.9
RSUs | Management |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Stock-based compensation expense | 10.3 | $ 5.9 | $ 1.5
RSUs | Deferred Director Awards |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Stock-based compensation expense | $ 0.8 |  |

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