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Summary of Significant Accounting Policies - Foreign Currency Translation (Detail) - USD ($)	12 Months Ended
	Sep. 30, 2023	Sep. 24, 2022	Sep. 25, 2021
Accounting Policies [Abstract]
Conversion Gains and Losses on Foreign Investments	$ (7,900,000)	$ 48,500,000	$ (15,100,000)

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- References

No definition available.

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- Definition

Represents gains or losses resulting from transactions conducted in foreign currencies.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 35
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482014/830-20-35-1

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