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Summary of Significant Accounting Policies - Schedule of Other Assets (Detail) - USD ($) $ in Millions	Sep. 29, 2018	Sep. 30, 2017
Accounting Policies [Abstract]
Life insurance contracts	$ 44.2	$ 41.0
Manufacturing access fees	4.6	7.1
Cost-method equity investments	8.8	3.0
Manufacturing access fees	12.9	9.1
Other	27.2	24.5
Other assets	$ 97.7	$ 84.7

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- Definition

The aggregate carrying value of the Company's cost-method investments at the balance sheet date.

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Represents the net carrying value of a long-term prepaid manufacturing supply agreement.

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Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 4
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6812-107765

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Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences and carryforwards, classified as noncurrent.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84176650&loc=d3e31917-109318

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Amount of other miscellaneous assets.

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Amount of noncurrent assets classified as other.

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-Topic 210
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