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Business Combinations - Purchase Price Allocation Focal Therapeutics (Details) - USD ($) $ in Millions | Sep. 26, 2020 | Sep. 28, 2019 | Oct. 01, 2018
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Goodwill | $ 2,657.9 | $ 2,563.7 |
Focal Therapeutics |  |  |
Business Acquisition [Line Items] |  |  |
Cash |  |  | $ 2.2
Accounts receivable |  |  | 2.0
Inventory |  |  | 7.9
Other assets |  |  | 0.5
Accounts payable and accrued expenses |  |  | (5.6)
Long-term debt |  |  | (2.5)
Deferred income taxes, net |  |  | (12.7)
Goodwill |  |  | 31.1
Purchase Price |  |  | 120.1
Focal Therapeutics | Developed technology |  |  |
Business Acquisition [Line Items] |  |  |
Identifiable intangible assets: |  |  | 83.1
Focal Therapeutics | In-process research and development |  |  |
Business Acquisition [Line Items] |  |  |
Identifiable intangible assets: |  |  | 11.4
Focal Therapeutics | Trade names |  |  |
Business Acquisition [Line Items] |  |  |
Identifiable intangible assets: |  |  | $ 2.7

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