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Intangible Assets - Components of Intangible Assets (Detail) - USD ($)
$ in Millions
Jun. 30, 2024
Sep. 30, 2023
Finite And Indefinite Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 21,126 $ 21,069
Accumulated Amortization (11,263) (10,168)
Net Carrying Amount 9,864 10,901
Unamortized intangible assets 46 46
Acquired in-process research and development    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Unamortized intangible assets 44 44
Trademarks    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Unamortized intangible assets 2 2
Developed technology    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Gross Carrying Amount 15,088 15,080
Accumulated Amortization (7,813) (7,023)
Net Carrying Amount 7,275 8,058
Customer relationships    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Gross Carrying Amount 4,860 4,859
Accumulated Amortization (2,783) (2,521)
Net Carrying Amount 2,076 2,338
Patents, trademarks and other    
Finite And Indefinite Lived Intangible Assets [Line Items]    
Gross Carrying Amount 1,179 1,130
Accumulated Amortization (666) (624)
Net Carrying Amount $ 513 $ 505