Collaboration Agreements and Business Development Activities - Other Collaborations Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2026	Jan. 03, 2025	Dec. 29, 2023
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	$ 2,320,126	$ 2,168,701	$ 1,830,208
Research and development	825,001	910,408	1,044,071
Research Collaborations, In-Licensing Arrangements and Other Business Development Activities
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Research and development	25,700	$ 69,200	$ 173,000
Collaborative arrangement, maximum aggregate development milestone payments	441,500
Potential regulatory milestone payments	278,000
Collaborative arrangement, rights and obligations, maximum aggregate commercial milestone payments	$ 2,500,000