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Basis of Presentation and Significant Accounting Policies - Summary Of Transactions Related Charges (Details) - USD ($) $ in Millions	3 Months Ended
	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

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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.

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