Summary of Significant Accounting Policies - Medical Aesthetics Impairment and Other Activity (Details) - USD ($)	3 Months Ended					12 Months Ended
	Sep. 26, 2020	Mar. 28, 2020	Dec. 28, 2019	Mar. 30, 2019	Mar. 31, 2018	Sep. 28, 2019	Oct. 01, 2018
Business Acquisition [Line Items]
Impairment charge			$ 30,200,000	$ 685,400,000
Goodwill and Intangible Asset Impairment						$ 685,400,000
Acessa Health [Member] | Developed technology
Business Acquisition [Line Items]
Identifiable intangible assets:	$ 127,000,000.0
Acessa Health [Member] | Trade names
Business Acquisition [Line Items]
Identifiable intangible assets:	1,200,000
Focal Therapeutics | Developed technology
Business Acquisition [Line Items]
Identifiable intangible assets:							$ 83,100,000
Focal Therapeutics | Trade names
Business Acquisition [Line Items]
Identifiable intangible assets:							2,700,000
Focal Therapeutics | In-process research and development
Business Acquisition [Line Items]
Identifiable intangible assets:							$ 11,400,000
In process research and development reclassified to developed technology						$ 5,500,000
Medical Aesthetics
Business Acquisition [Line Items]
Impairment charge		$ 30,200,000
Distribution agreement [Member] | Medical Aesthetics
Business Acquisition [Line Items]
Impairment charge	27,700,000	1,200,000
Customer relationships | Medical Aesthetics
Business Acquisition [Line Items]
Impairment charge	22,400,000	900,000
Trade names | Medical Aesthetics
Business Acquisition [Line Items]
Impairment charge	48,600,000	2,000,000.0
Developed Technology [Member] | Medical Aesthetics
Business Acquisition [Line Items]
Impairment charge	576,900,000	$ 24,100,000
Property, Plant and Equipment [Member] | Medical Aesthetics
Business Acquisition [Line Items]
Impairment charge	$ 9,800,000
In-process research and development | Medical Aesthetics
Business Acquisition [Line Items]
Impairment charge					$ 46,000,000.0