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Commitments and Contingencies (Details) $ in Millions | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 28, 2019 USD ($) | Sep. 27, 2019 USD ($) Lawsuit | Jun. 26, 2020 USD ($) | Nov. 30, 2019 USD ($)
Loss Contingencies [Line Items] |  |  |  |
Severance costs | $ 19.8 |  |  |
Number of class action lawsuits | Lawsuit |  | 2 |  |
Accrued Expenses and Other Current Liabilities |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Estimate of possible loss |  |  |  | $ 21.0
Chairman, President and Chief Executive Officer | Employee severance and other costs | Accrued Payroll and Related Expenses |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Severance costs |  | $ 10.4 |  |
Severance costs accrual, current |  |  | $ 6.7 |

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