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Intangible Assets and Goodwill -Narrative (Details) - USD ($) $ in Millions | 3 Months Ended
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Dec. 28, 2019 | Dec. 29, 2018
Finite-Lived Intangible Assets [Line Items] |  |
Intangible asset impairment charges | $ 30.2 | $ 0.0
Medical Aesthetics |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible asset impairment charges | 30.2 |
Developed technology | Medical Aesthetics |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible asset impairment charges | 24.1 |
Customer relationships | Medical Aesthetics |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible asset impairment charges | 0.9 |
Trade names | Medical Aesthetics |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible asset impairment charges | 2.0 |
Distribution agreement | Medical Aesthetics |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible asset impairment charges | $ 1.2 |

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