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Collaboration Agreements And Business Development Activities - Research Collaborations and In-Licensing Arrangements Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2025	Sep. 27, 2024	Oct. 03, 2025	Sep. 27, 2024
Asset Acquisition [Line Items]
Research and development	$ 199,164	$ 222,570	$ 611,753	$ 661,406
Research Collaborations, In-Licensing Arrangements and Other Business Development Activities
Asset Acquisition [Line Items]
Research and development	8,400	$ 18,700	19,300	$ 47,200
Collaborative arrangement, maximum aggregate development milestone payments	441,500		441,500
Collaborative arrangement, maximum aggregate regulatory milestone payments	278,000		278,000
Collaborative arrangement, rights and obligations, maximum aggregate commercial milestone payments	$ 2,500,000		$ 2,500,000

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
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-Publisher FASB
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Amount of expense for research and development. Includes, but is not limited to, cost for computer software product to be sold, leased, or otherwise marketed and writeoff of research and development assets acquired in transaction other than business combination or joint venture formation or both. Excludes write-down of intangible asset acquired in business combination or from joint venture formation or both, used in research and development activity.

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