Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 29, 2025	Jun. 23, 2024	Jun. 29, 2025	Jun. 23, 2024
Segment Reporting Information [Line Items]
Revenues	$ 10,365	$ 9,393	$ 33,013	$ 28,718
Cost of revenues	(4,606)	(4,174)	(14,704)	(12,593)
Research and development expenses	(2,226)	(2,259)	(6,672)	(6,591)
Selling, general and administrative expenses	(771)	(664)	(2,200)	(1,998)
Other Operating Income (Expense), Net	0	(75)	0	(47)
Interest expense	(168)	(168)	(493)	(517)
EBT	2,952	2,279	9,692	7,740
Reconciling Items
Segment Reporting Information [Line Items]
Revenues	54	49	295	131
Cost of revenues	(65)	(54)	(185)	(168)
Research and development expenses	(595)	(549)	(1,752)	(1,664)
Selling, general and administrative expenses	(182)	(175)	(554)	(588)
Other Operating Income (Expense), Net	0	(75)	0	(47)
Interest expense	(168)	(168)	(493)	(518)
Investment and other (expense) income, net	210	213	567	648
EBT	(810)	(810)	(2,289)	(2,350)
Reconciling Items | Licensing Agreements
Segment Reporting Information [Line Items]
Revenues	0	0	143	0
QCT | Operating Segments
Segment Reporting Information [Line Items]
Revenues	8,993	8,069	28,546	24,518
EBT	2,671	2,181	8,774	7,062
QTL | Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,318	1,273	4,172	4,051
EBT	942	894	3,028	2,907
QSI | Operating Segments
Segment Reporting Information [Line Items]
Revenues	0	2	0	18
EBT	149	14	179	121
Other Operating Segment
Segment Reporting Information [Line Items]
Revenues	54	49	152	131
Other Operating Segment | Reconciling Items
Segment Reporting Information [Line Items]
EBT	$ (10)	$ (2)	$ (15)	$ (13)