Intangible Assets and Goodwill -Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	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