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Restructuring Charges - Charges Taken Related to Accrued Restructuring Actions (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 30, 2023
Restructuring Reserve [Roll Forward]
Restructuring charges	$ 28.6	$ 41.1	$ 12.0
Fiscal 2023 restructuring charges
Restructuring Reserve [Roll Forward]
Balance			3.1
Fiscal restructuring charges			12.0
Restructuring charges			12.0
Severance payments			(6.1)
Fiscal 2024 restructuring charges
Restructuring Reserve [Roll Forward]
Balance	12.0	9.0
Fiscal restructuring charges		41.1
Restructuring charges		41.1
Non-cash impairment charge		(12.5)
Non-cash accelerated depreciation and disposal charge		(7.2)
Severance payments		(18.4)
Balance		12.0	9.0
Fiscal 2025 restructuring charges
Restructuring Reserve [Roll Forward]
Restructuring charges	28.6
Non-cash accelerated depreciation and disposal charge	(0.7)
Severance payments	(26.0)
Other payments and adjustments	(3.2)
Balance	10.7
Fiscal 2025 Actions | Fiscal 2023 restructuring charges
Restructuring Reserve [Roll Forward]
Balance			0.0
Fiscal restructuring charges			0.0
Restructuring charges			0.0
Severance payments			0.0
Fiscal 2025 Actions | Fiscal 2024 restructuring charges
Restructuring Reserve [Roll Forward]
Balance	0.0	0.0
Fiscal restructuring charges		0.0
Restructuring charges		0.0
Non-cash impairment charge		0.0
Non-cash accelerated depreciation and disposal charge		0.0
Severance payments		0.0
Balance		0.0	0.0
Fiscal 2025 Actions | Fiscal 2025 restructuring charges
Restructuring Reserve [Roll Forward]
Restructuring charges	22.0
Non-cash accelerated depreciation and disposal charge	(0.7)
Severance payments	(12.2)
Other payments and adjustments	0.4
Balance	9.5
Fiscal 2024 Actions | Fiscal 2023 restructuring charges
Restructuring Reserve [Roll Forward]
Balance			0.0
Fiscal restructuring charges			0.0
Restructuring charges			0.0
Severance payments			0.0
Fiscal 2024 Actions | Fiscal 2024 restructuring charges
Restructuring Reserve [Roll Forward]
Balance	5.5	0.0
Fiscal restructuring charges		36.7
Restructuring charges		36.7
Non-cash impairment charge		(12.5)
Non-cash accelerated depreciation and disposal charge		(7.2)
Severance payments		(11.5)
Balance		5.5	0.0
Fiscal 2024 Actions | Fiscal 2025 restructuring charges
Restructuring Reserve [Roll Forward]
Restructuring charges	3.4
Non-cash accelerated depreciation and disposal charge	0.0
Severance payments	(7.4)
Other payments and adjustments	(0.9)
Balance	0.6
Fiscal 2023 Actions | Fiscal 2023 restructuring charges
Restructuring Reserve [Roll Forward]
Balance			0.0
Fiscal restructuring charges			5.5
Restructuring charges			5.5
Severance payments			(3.2)
Fiscal 2023 Actions | Fiscal 2024 restructuring charges
Restructuring Reserve [Roll Forward]
Balance	0.3	2.3
Fiscal restructuring charges		0.0
Restructuring charges		0.0
Non-cash impairment charge		0.0
Non-cash accelerated depreciation and disposal charge		0.0
Severance payments		(2.0)
Balance		0.3	2.3
Fiscal 2023 Actions | Fiscal 2025 restructuring charges
Restructuring Reserve [Roll Forward]
Restructuring charges	0.0
Non-cash accelerated depreciation and disposal charge	0.0
Severance payments	(0.1)
Other payments and adjustments	0.0
Balance	0.2
Other | Fiscal 2023 restructuring charges
Restructuring Reserve [Roll Forward]
Balance			3.1
Fiscal restructuring charges			6.5
Restructuring charges			6.5
Severance payments			(2.9)
Other | Fiscal 2024 restructuring charges
Restructuring Reserve [Roll Forward]
Balance	6.2	6.7
Fiscal restructuring charges		4.4
Restructuring charges		4.4
Non-cash impairment charge		0.0
Non-cash accelerated depreciation and disposal charge		0.0
Severance payments		(4.9)
Balance		$ 6.2	$ 6.7
Other | Fiscal 2025 restructuring charges
Restructuring Reserve [Roll Forward]
Restructuring charges	3.2
Non-cash accelerated depreciation and disposal charge	0.0
Severance payments	(6.3)
Other payments and adjustments	(2.7)
Balance	$ 0.4

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4.b.1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482047/420-10-45-3

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479823/420-10-S99-1

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Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan and expenses resulting from the write-down of assets. Excludes expenses related to a business combination, a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4.b.2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482017/420-10-50-1

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Amount of accelerated depreciation charged against earnings associated with exit from or disposal of business activities or restructuring plan.

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