Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 30, 2025	Mar. 24, 2024	Mar. 30, 2025	Mar. 24, 2024
Segment Reporting Information [Line Items]
Revenues	$ 10,979	$ 9,389	$ 22,649	$ 19,325
Cost of revenues	(4,937)	(4,106)	(10,098)	(8,418)
Research and development expenses	(2,216)	(2,236)	(4,446)	(4,332)
Selling, general and administrative expenses	(706)	(707)	(1,430)	(1,335)
Other Operating Income (Expense), Net	0	0	0	28
Interest expense	(163)	(172)	(326)	(350)
EBT	3,105	2,498	6,740	5,460
Reconciling Items
Segment Reporting Information [Line Items]
Revenues	191	42	242	82
Cost of revenues	(60)	(57)	(119)	(113)
Research and development expenses	(558)	(584)	(1,156)	(1,116)
Selling, general and administrative expenses	(184)	(229)	(372)	(414)
Other Operating Income (Expense), Net	0	0	0	28
Interest expense	(163)	(172)	(326)	(350)
Investment and other (expense) income, net	138	228	358	434
EBT	(691)	(819)	(1,478)	(1,541)
Reconciling Items | Licensing Agreements
Segment Reporting Information [Line Items]
Revenues	143	0	143	0
QCT
Segment Reporting Information [Line Items]
Revenues	9,469	8,026	19,553	16,449
EBT	2,857	2,288	6,103	4,881
QTL
Segment Reporting Information [Line Items]
Revenues	1,319	1,318	2,854	2,778
EBT	929	933	2,086	2,013
QSI
Segment Reporting Information [Line Items]
Revenues	0	3	0	16
EBT	10	96	29	107
Other Operating Segment
Segment Reporting Information [Line Items]
Revenues	48	42	99	82
Other Operating Segment | Reconciling Items
Segment Reporting Information [Line Items]
EBT	$ (7)	$ (5)	$ (6)	$ (10)