Financial Instruments - Cash, Cash Equivalents and Marketable Securities (Details) - USD ($)
$ in Millions |
Sep. 27, 2025 |
Sep. 28, 2024 |
| Marketable Securities [Line Items] |
|
|
| Cash, Cash Equivalents and Marketable Securities, Adjusted Cost |
$ 134,711
|
$ 160,600
|
| Cash Equivalents and Marketable Securities, Unrealized Gains |
736
|
688
|
| Cash Equivalents and Marketable Securities, Unrealized Loss |
(3,027)
|
(4,638)
|
| Cash, Cash Equivalents and Marketable Securities, Fair Value |
132,420
|
156,650
|
| Cash and Cash Equivalents |
35,934
|
29,943
|
| Current Marketable Securities |
18,763
|
35,228
|
| Non-Current Marketable Securities |
77,723
|
91,479
|
| Unfavorable investigation outcome, EU State Aid rules |
|
|
| Marketable Securities [Line Items] |
|
|
| Cash and cash equivalents held in escrow and restricted from general use |
|
2,600
|
| Current marketable securities held in escrow and restricted from general use |
|
13,200
|
| Level 1 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Equity, Adjusted Cost |
5,951
|
1,293
|
| Marketable Securities, Equity, Unrealized Gains |
177
|
105
|
| Marketable Securities, Equity, Unrealized Losses |
(2)
|
(3)
|
| Marketable Securities, Equity, Fair Value |
6,126
|
1,395
|
| Cash and Cash Equivalents |
5,272
|
778
|
| Current Marketable Securities |
854
|
617
|
| Non-Current Marketable Securities |
0
|
0
|
| Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
100,493
|
132,108
|
| Marketable Securities, Debt, Unrealized Gains |
559
|
583
|
| Marketable Securities, Debt, Unrealized Losses |
(3,025)
|
(4,635)
|
| Marketable Securities, Debt, Fair Value |
98,027
|
128,056
|
| Cash and Cash Equivalents |
2,395
|
1,966
|
| Current Marketable Securities |
17,909
|
34,611
|
| Non-Current Marketable Securities |
77,723
|
91,479
|
| Cash |
|
|
| Marketable Securities [Line Items] |
|
|
| Cash |
28,267
|
27,199
|
| Cash and Cash Equivalents |
28,267
|
27,199
|
| Money market funds | Level 1 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Equity, Adjusted Cost |
5,272
|
778
|
| Marketable Securities, Equity, Unrealized Gains |
0
|
0
|
| Marketable Securities, Equity, Unrealized Losses |
0
|
0
|
| Marketable Securities, Equity, Fair Value |
5,272
|
778
|
| Cash and Cash Equivalents |
5,272
|
778
|
| Current Marketable Securities |
0
|
0
|
| Non-Current Marketable Securities |
0
|
0
|
| Mutual funds | Level 1 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Equity, Adjusted Cost |
679
|
515
|
| Marketable Securities, Equity, Unrealized Gains |
177
|
105
|
| Marketable Securities, Equity, Unrealized Losses |
(2)
|
(3)
|
| Marketable Securities, Equity, Fair Value |
854
|
617
|
| Cash and Cash Equivalents |
0
|
0
|
| Current Marketable Securities |
854
|
617
|
| Non-Current Marketable Securities |
0
|
0
|
| U.S. Treasury securities | Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
16,074
|
16,150
|
| Marketable Securities, Debt, Unrealized Gains |
56
|
45
|
| Marketable Securities, Debt, Unrealized Losses |
(282)
|
(516)
|
| Marketable Securities, Debt, Fair Value |
15,848
|
15,679
|
| Cash and Cash Equivalents |
1,190
|
212
|
| Current Marketable Securities |
3,712
|
4,087
|
| Non-Current Marketable Securities |
10,946
|
11,380
|
| U.S. agency securities | Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
5,269
|
5,431
|
| Marketable Securities, Debt, Unrealized Gains |
0
|
0
|
| Marketable Securities, Debt, Unrealized Losses |
(149)
|
(272)
|
| Marketable Securities, Debt, Fair Value |
5,120
|
5,159
|
| Cash and Cash Equivalents |
251
|
155
|
| Current Marketable Securities |
2,456
|
703
|
| Non-Current Marketable Securities |
2,413
|
4,301
|
| Non-U.S. government securities | Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
6,586
|
17,959
|
| Marketable Securities, Debt, Unrealized Gains |
111
|
93
|
| Marketable Securities, Debt, Unrealized Losses |
(424)
|
(484)
|
| Marketable Securities, Debt, Fair Value |
6,273
|
17,568
|
| Cash and Cash Equivalents |
0
|
1,158
|
| Current Marketable Securities |
855
|
10,810
|
| Non-Current Marketable Securities |
5,418
|
5,600
|
| Certificates of deposit and time deposits | Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
917
|
873
|
| Marketable Securities, Debt, Unrealized Gains |
0
|
0
|
| Marketable Securities, Debt, Unrealized Losses |
0
|
0
|
| Marketable Securities, Debt, Fair Value |
917
|
873
|
| Cash and Cash Equivalents |
904
|
387
|
| Current Marketable Securities |
0
|
478
|
| Non-Current Marketable Securities |
13
|
8
|
| Commercial paper | Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
100
|
1,066
|
| Marketable Securities, Debt, Unrealized Gains |
0
|
0
|
| Marketable Securities, Debt, Unrealized Losses |
0
|
0
|
| Marketable Securities, Debt, Fair Value |
100
|
1,066
|
| Cash and Cash Equivalents |
50
|
28
|
| Current Marketable Securities |
50
|
1,038
|
| Non-Current Marketable Securities |
0
|
0
|
| Corporate debt securities | Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
47,210
|
65,622
|
| Marketable Securities, Debt, Unrealized Gains |
266
|
270
|
| Marketable Securities, Debt, Unrealized Losses |
(916)
|
(1,953)
|
| Marketable Securities, Debt, Fair Value |
46,560
|
63,939
|
| Cash and Cash Equivalents |
0
|
26
|
| Current Marketable Securities |
10,623
|
16,027
|
| Non-Current Marketable Securities |
35,937
|
47,886
|
| Municipal securities | Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
207
|
412
|
| Marketable Securities, Debt, Unrealized Gains |
0
|
0
|
| Marketable Securities, Debt, Unrealized Losses |
(2)
|
(7)
|
| Marketable Securities, Debt, Fair Value |
205
|
405
|
| Cash and Cash Equivalents |
0
|
0
|
| Current Marketable Securities |
119
|
190
|
| Non-Current Marketable Securities |
86
|
215
|
| Mortgage- and asset-backed securities | Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
24,130
|
24,595
|
| Marketable Securities, Debt, Unrealized Gains |
126
|
175
|
| Marketable Securities, Debt, Unrealized Losses |
(1,252)
|
(1,403)
|
| Marketable Securities, Debt, Fair Value |
23,004
|
23,367
|
| Cash and Cash Equivalents |
0
|
0
|
| Current Marketable Securities |
94
|
1,278
|
| Non-Current Marketable Securities |
$ 22,910
|
$ 22,089
|