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Collaboration Agreements And Business Development Activities - Collaboration Revenues under the Collaboration Agreement with Takeda (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 04, 2025	Mar. 29, 2024
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	$ 555,447	$ 425,226
Collaborative Arrangement with Takeda
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	3,716	5,895
License revenues
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	42,480	44,676
License revenues | Collaborative Arrangement with Takeda
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	2,759	2,710
Collaboration services revenues
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	(316)	2,027
Collaboration services revenues | Collaborative Arrangement with Takeda
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	$ 957	$ 3,185

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