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Collaboration Agreements And Business Development Activities - Collaboration Revenues under the Collaboration Agreement with Ipsen (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 03, 2025
Dec. 29, 2023
Dec. 30, 2022
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Total revenues $ 2,168,701 $ 1,830,208 $ 1,611,062
Collaborative Arrangement with Ipsen      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Total revenues 318,633 144,969 168,592
License revenues      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Total revenues 349,244 178,635 162,056
License revenues | Collaborative Arrangement with Ipsen      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Total revenues 317,026 135,818 133,732
Collaboration services revenues      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Total revenues 10,062 22,694 47,763
Collaboration services revenues | Collaborative Arrangement with Ipsen      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Total revenues $ 1,607 $ 9,151 $ 34,860