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Income Taxes (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended			6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Dec. 29, 2018	Mar. 28, 2020	Mar. 30, 2019	Sep. 28, 2019
Segment Reporting Information [Line Items]
Unrecognized Tax Benefits	$ 212.7			$ 212.7		$ 101.6
Company's effective tax rate	20.30%	22.90%		122.10%	30.20%
Increase to income tax expense adoption of ASU 2016-16		$ 29.5
Decrease in deferred tax liabilities due to ASC 2016-16		48.7
Increase to Net Income resulted from adoption of ASU 2016-16		$ 19.2
Increase to Earnings per Share resulted from adoption of ASC 2016-16		$ 0.07
Increase in deferred tax assets resulting from adoption of ASCU 2016-16			$ 2.9
Decease in accumulated deficit resulting from adoption of ASCU 2016-16			2.5
Decease to prepaid taxes resulting from adoption of ASCU 2016-16			$ 0.4
Medical Aesthetics [Domain]
Segment Reporting Information [Line Items]
Other Tax Expense (Benefit)				$ 310.9

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