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Acquisitions, Goodwill and Intangible Assets - Summary of Amount Assigned to Identifiable Intangible Assets (Details) - USD ($)
$ in Millions
12 Months Ended
Jan. 02, 2022
Aug. 18, 2021
Developed technology    
Indefinite-lived Intangible Assets [Line Items]    
Useful life (in years) 18 years  
Trade name    
Indefinite-lived Intangible Assets [Line Items]    
Useful life (in years) 9 years  
GRAIL Inc    
Indefinite-lived Intangible Assets [Line Items]    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total $ 3,120 $ 3,180
GRAIL Inc | In-process research and development (IPR&D)    
Indefinite-lived Intangible Assets [Line Items]    
Indefinite lived intangible assets acquired 670  
GRAIL Inc | Developed technology    
Indefinite-lived Intangible Assets [Line Items]    
Finite-lived intangible assets acquired 2,410  
GRAIL Inc | Trade name    
Indefinite-lived Intangible Assets [Line Items]    
Finite-lived intangible assets acquired $ 40