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Business Segments and Geographic Information - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Mar. 28, 2020 USD ($)	Mar. 30, 2019 USD ($)	Mar. 28, 2020 USD ($) Segment	Mar. 30, 2019 USD ($)
Segment Reporting Disclosure [Line Items]
Number of reportable segments | Segment			5
Revenues	$ 756,100,000	$ 818,400,000	$ 1,606,600,000	$ 1,649,100,000
Concentration Risk, Customer	0	0	0	0
Intersegment
Segment Reporting Disclosure [Line Items]
Revenues	$ 0	$ 0	$ 0	$ 0

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Segment Reporting Disclosure [Line Items]

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Description of risks that arise due to the volume of business transacted with a particular customer. At a minimum, the description informs financial statement users of the general nature of the risk, but excludes "Information about Major Customers" that may be disclosed elsewhere (for instance, segment disclosures).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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