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Basis of Presentation and Significant Accounting Policies - Summary Of Transactions Related Charges (Details) - USD ($) $ in Millions | 3 Months Ended
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Jan. 03, 2021 | Dec. 29, 2019
Business Acquisition [Line Items] |  |
Total transaction-related charges | $ 20.6 | $ 4.1
Armitage acquisition |  |
Business Acquisition [Line Items] |  |
Total transaction-related charges | 4.8 | 0.0
Other |  |
Business Acquisition [Line Items] |  |
Total transaction-related charges | 11.2 | 1.6
Coevorden operations divestiture |  |
Business Acquisition [Line Items] |  |
Total transaction-related charges | 2.8 | 0.2
GBL divestiture |  |
Business Acquisition [Line Items] |  |
Total transaction-related charges | $ 1.8 | $ 2.3

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- Definition Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs. + References No definition available. + Details
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