Annual report pursuant to Section 13 and 15(d)

Composition of Certain Financial Statement Items Other intangible assets (Details)

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Composition of Certain Financial Statement Items Other intangible assets (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 24, 2017
Sep. 25, 2016
Sep. 27, 2015
Other intangible assets [Line Items]      
Gross Carrying Amount $ 6,640 $ 6,042  
Accumulated Amortization $ (2,903) $ (2,542)  
Weighted-average amortization period (years) 10 years 10 years  
Carrying value of acquired in-process research and development $ 74 $ 83  
Amortization of intangible assets 777 804 $ 591
Amortization expense, Fiscal 2018 780    
Amortization expense, Fiscal 2019 734    
Amortization expense, Fiscal 2020 622    
Amortization expense, Fiscal 2021 507    
Amortization expense, Fiscal 2022 415    
Amortization expense, thereafter 679    
Wireless spectrum [Member]      
Other intangible assets [Line Items]      
Gross Carrying Amount 1 2  
Accumulated Amortization $ 0 $ (2)  
Weighted-average amortization period (years) 20 years 5 years  
Marketing-related [Member]      
Other intangible assets [Line Items]      
Gross Carrying Amount $ 77 $ 119  
Accumulated Amortization $ (52) $ (77)  
Weighted-average amortization period (years) 4 years 8 years  
Technology-based [Member]      
Other intangible assets [Line Items]      
Gross Carrying Amount $ 6,413 $ 5,900  
Accumulated Amortization $ (2,818) $ (2,459)  
Weighted-average amortization period (years) 10 years 10 years  
Customer-related [Member]      
Other intangible assets [Line Items]      
Gross Carrying Amount $ 149 $ 21  
Accumulated Amortization $ (33) $ (4)  
Weighted-average amortization period (years) 9 years 7 years