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Intangible assets and goodwil - Schedule of Intangible Assets and Goodwill (Details) - USD ($)
$ in Millions
Dec. 29, 2024
Sep. 30, 2024
Dec. 31, 2023
Dec. 22, 2022
Intangible assets with indefinite lives:        
Indefinite lived intangible assets $ 12,281   $ 10,929  
Total intangible assets - net 37,618   34,175  
Intangible assets useful life       14 years
Trademarks        
Intangible assets with indefinite lives:        
Indefinite lived intangible assets 0   1,714  
Purchased in-process research and development        
Intangible assets with indefinite lives:        
Indefinite lived intangible assets 12,281   9,215  
Patents And Trademarks        
Intangible assets with definite lives:        
Finite lived intangible assets gross 44,695   40,417  
Less accumulated amortization (26,124)   (24,808)  
Finite lived intangible assets net $ 18,571   15,609  
Intangible assets with indefinite lives:        
Intangible assets useful life 12 years      
Customer relationships and other intangible assets        
Intangible assets with definite lives:        
Finite lived intangible assets gross $ 20,310   20,322  
Less accumulated amortization (13,544)   (12,685)  
Finite lived intangible assets net $ 6,766   $ 7,637  
Intangible assets with indefinite lives:        
Intangible assets useful life 18 years      
Trademarks        
Intangible assets with definite lives:        
Finite lived intangible assets gross   $ 1,700    
Intangible assets with indefinite lives:        
Intangible assets useful life   25 years