Deferred Costs and Other Contract Assets - Schedule of Deferred Costs and Other Contract Assets (Details) - USD ($) $ in Millions	Sep. 27, 2025	Dec. 28, 2024	Dec. 30, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred commissions	$ 24.5	$ 25.0
Unbilled contract receivables	19.8	20.2
Prepaid contract allowances	12.4	14.5
Deferred equipment agreements, net	1.8	1.3
Deferred costs and other contract assets	$ 58.5	$ 61.0	$ 57.3

Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 912
-SubTopic 310
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478345/912-310-45-2

Name:	us-gaap_UnbilledContractsReceivable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant