Financial Instruments and Fair Value Measurements - SG&A (Details) - Level 3 - Contingent Liabilities - Recurring - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 26, 2025	Sep. 27, 2024	Sep. 26, 2025	Sep. 27, 2024
Asset Acquisition, Contingent Consideration [Line Items]
Total contingent consideration expense	$ 2.1	$ 1.1	$ 2.9	$ 3.2
Terlivaz CVR
Asset Acquisition, Contingent Consideration [Line Items]
Total contingent consideration expense	1.7	1.1	2.5	3.2
Auxilium
Asset Acquisition, Contingent Consideration [Line Items]
Total contingent consideration expense	$ 0.4	$ 0.0	$ 0.4	$ 0.0

Amount of increase (decrease) of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-3

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration