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Collaboration Agreements And Business Development Activities - Collaboration Revenues under the Collaboration Agreement with Ipsen (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2025	Sep. 27, 2024	Oct. 03, 2025	Sep. 27, 2024
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	$ 597,755	$ 539,542	$ 1,721,463	$ 1,601,946
Collaborative Arrangement with Ipsen
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	44,966	51,081	114,705	277,343
License revenues
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	56,236	60,239	148,017	299,901
License revenues | Collaborative Arrangement with Ipsen
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	47,313	51,275	120,832	276,062
Collaboration services revenues
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	(1,411)	1,244	(2,781)	7,882
Collaboration services revenues | Collaborative Arrangement with Ipsen
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	$ (2,347)	$ (194)	$ (6,127)	$ 1,281

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