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Summary of Significant Accounting Policies - Intangible Assets and Goodwill (Details) - USD ($) $ in Millions	Sep. 24, 2022	Sep. 25, 2021	Mar. 27, 2021	Mar. 01, 2021	Aug. 23, 2020
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 3,236.5	$ 3,281.6
Goodwill not at risk of failing impairment	$ 3,200.0
Acessa Health
Finite-Lived Intangible Assets [Line Items]
Goodwill					$ 49.1
Diagenode
Finite-Lived Intangible Assets [Line Items]
Goodwill				$ 83.5
Diagenode | Developed Technology
Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			$ 69.8

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