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Disposition - Additional Information (Details) - USD ($) |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Nov. 20, 2019 | Sep. 26, 2020 | Dec. 28, 2019 | Mar. 30, 2019 | Sep. 26, 2020 | Sep. 28, 2019 | Sep. 29, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Proceeds from divestiture of businesses |  |  |  |  | $ 139,300,000 | $ 0 | $ 0
Impairment charge |  |  | $ 30,200,000 | $ 685,400,000 |  |  |
Cost of revenues |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Impairment charge |  |  | 25,800,000 |  |  |  |
Operating Expense |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Impairment charge |  |  | $ 4,400,000 |  |  |  |
Medical Aesthetics Business |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Expenses from disposition |  | $ 6,200,000 |  |  |  |  |
Medical Aesthetics Business | Disposed of by Sale |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Sales price | $ 205,000,000.0 |  |  |  |  |  |
Proceeds from divestiture of businesses | $ 153,400,000 |  |  |  |  |  |
Final sales price |  | 150,000,000.0 |  |  | 150,000,000.0 |  |
Indemnification liabily |  | $ 10,900,000 |  |  | $ 10,900,000 |  |
Medical Aesthetics Business | Disposed of by Sale | Minimum |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Transition services agreement term |  | 3 months |  |  |  |  |
Medical Aesthetics Business | Disposed of by Sale | Maximum |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Transition services agreement term |  | 15 months |  |  |  |  |

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