Composition of Certain Financial Statement Items Goodwill (Details) - USD ($) $ in Millions		12 Months Ended
		Sep. 29, 2024		Sep. 24, 2023
Goodwill [Roll Forward]
Beginning balance		$ 10,642	[1]	$ 10,508
Acquisitions		126		76
Foreign currency translation adjustments		31		58
Ending balance	[1]	10,799		10,642
Cumulative goodwill impairments		812		812
QCT
Goodwill [Roll Forward]
Beginning balance		9,909	[1]	9,777
Acquisitions		126		76
Foreign currency translation adjustments		30		56
Ending balance	[1]	10,065		9,909
QTL
Goodwill [Roll Forward]
Beginning balance		733	[1]	731
Acquisitions		0		0
Foreign currency translation adjustments		1		2
Ending balance	[1]	$ 734		$ 733

[1] Cumulative goodwill impairments were $812 million at both September 29, 2024 and September 24, 2023.