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SUPPLEMENTAL BALANCE SHEET DETAILS - Narrative - Impairment of Goodwill and Intangible Assets (Details)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Jun. 24, 2024
USD ($)
Sep. 29, 2024
USD ($)
Jun. 30, 2024
USD ($)
Oct. 01, 2023
USD ($)
Sep. 29, 2024
USD ($)
reporting_unit
Oct. 01, 2023
USD ($)
Dec. 31, 2023
USD ($)
Goodwill [Line Items]              
Number of reporting units | reporting_unit         2    
Goodwill and intangible impairment         $ 1,466    
Goodwill   $ 1,113     1,113   $ 2,545
Effect of 300 point increase in discount rate on impairment loss     $ 20        
Amortization of intangible assets   17   $ 49 $ 113 $ 148  
Developed technologies | Fluent Bio Sciences              
Goodwill [Line Items]              
Finite-lived intangible assets acquired   42          
Useful life (in years)         7 years    
Customer relationships | Fluent Bio Sciences              
Goodwill [Line Items]              
Finite-lived intangible assets acquired   2          
Useful life (in years)         11 years    
In-process research and development (IPR&D)              
Goodwill [Line Items]              
Goodwill fair value recorded impairment             115
Spinoff | GRAIL              
Goodwill [Line Items]              
Amount of continuing cash flows after disposal $ 974            
GRAIL net assets $ 2,738            
Minimum | Spinoff | GRAIL              
Goodwill [Line Items]              
GRAIL net assets     400        
Maximum | Spinoff | GRAIL              
Goodwill [Line Items]              
GRAIL net assets     770        
GRAIL              
Goodwill [Line Items]              
Amount that exceeds carrying value   $ 580     $ 580    
Goodwill and intangible impairment     1,466 712      
Goodwill       3,600   $ 3,600  
Effect of 50 point increase in discount rate on impairment loss       200      
Effect of 100 point increase in discount rate on impairment loss       $ 350      
GRAIL | In-process research and development (IPR&D)              
Goodwill [Line Items]              
Goodwill fair value recorded impairment     $ 420        
GRAIL | Minimum              
Goodwill [Line Items]              
Goodwill             3,000
GRAIL | Maximum              
Goodwill [Line Items]              
Goodwill             $ 4,000
GRAIL | Measurement Input, Expected Term | Valuation Technique, Discounted Cash Flow              
Goodwill [Line Items]              
Goodwill impairment, measurement input   2          
GRAIL | Measurement Input, Expected Term | Valuation Technique, Discounted Cash Flow | In-process research and development (IPR&D)              
Goodwill [Line Items]              
Intangible assets, impairment, measurement input     15        
GRAIL | Measurement Input, Discount Rate | Valuation Technique, Discounted Cash Flow              
Goodwill [Line Items]              
Goodwill impairment, measurement input       0.240      
GRAIL | Measurement Input, Discount Rate | Valuation Technique, Discounted Cash Flow | In-process research and development (IPR&D)              
Goodwill [Line Items]              
Intangible assets, impairment, measurement input     0.465        
GRAIL | Measurement Input, Cash Flow Period | Valuation Technique, Discounted Cash Flow              
Goodwill [Line Items]              
Goodwill impairment, measurement input       15