Intangible Assets - Components of Intangible Assets (Detail) - USD ($) $ in Millions	Jun. 30, 2023	Sep. 30, 2022
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 21,087	$ 20,987
Accumulated Amortization	(9,820)	(8,723)
Net Carrying Amount	11,267	12,264
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	15,105	15,087
Accumulated Amortization	(6,770)	(5,979)
Net Carrying Amount	8,335	9,108
Customer relationships
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,861	4,853
Accumulated Amortization	(2,435)	(2,170)
Net Carrying Amount	2,426	2,683
Patents, trademarks and other
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,120	1,046
Accumulated Amortization	(614)	(574)
Net Carrying Amount	$ 506	$ 473