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Collaboration Agreements And Business Development Activities - Takeda Collaboration Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Jan. 03, 2025
Dec. 29, 2023
Dec. 31, 2017
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Collaboration agreement percent of royalty on net sale 3.00%    
Collaborative arrangement with Takeda      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Upfront payments     $ 50.0
Milestone payments earned to date $ 138.0    
Milestone payments earned   $ 11.0  
Maximum amount eligible for commercial milestones under collaborations agreement 108.0    
Remaining performance obligation 14.7    
Collaborative arrangement with Takeda | Initial      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Royalty tier $ 300.0    
Collaborative arrangement with Takeda | Initial | Minimum      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Percent of royalty on net sale 15.00%    
Collaborative arrangement with Takeda | Initial | Maximum      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Percent of royalty on net sale 24.00%    
Collaborative arrangement with Takeda | Final tier | Minimum      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Percent of royalty on net sale 20.00%    
Collaborative arrangement with Takeda | Final tier | Maximum      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Percent of royalty on net sale 30.00%    
Collaborative arrangement with Takeda | Japan      
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]      
Research and development arrangement performed for others, reimbursement for costs incurred, percent 100.00%    
Collaboration period to achieve specified levels of commercial performance 2 years    
Collaboration agreement percent of royalty on net sale 3.00%