Financial Instruments - Cash, Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Millions |
Jun. 28, 2025 |
Sep. 28, 2024 |
Marketable Securities [Line Items] |
|
|
Cash, Cash Equivalents and Marketable Securities, Adjusted Cost |
$ 136,270
|
$ 160,600
|
Cash Equivalents and Marketable Securities, Unrealized Gains |
525
|
688
|
Cash Equivalents and Marketable Securities, Unrealized Losses |
(3,809)
|
(4,638)
|
Cash, Cash Equivalents and Marketable Securities, Fair Value |
132,986
|
156,650
|
Cash and Cash Equivalents |
36,269
|
29,943
|
Current Marketable Securities |
19,103
|
35,228
|
Non-Current Marketable Securities |
77,614
|
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 |
4,425
|
1,293
|
Marketable Securities, Equity, Unrealized Gains |
134
|
105
|
Marketable Securities, Equity, Unrealized Losses |
(3)
|
(3)
|
Marketable Securities, Equity, Fair Value |
4,556
|
1,395
|
Cash and Cash Equivalents |
3,779
|
778
|
Current Marketable Securities |
777
|
617
|
Non-Current Marketable Securities |
0
|
0
|
Level 2 |
|
|
Marketable Securities [Line Items] |
|
|
Marketable Securities, Debt, Adjusted Cost |
105,159
|
132,108
|
Marketable Securities, Debt, Unrealized Gains |
391
|
583
|
Marketable Securities, Debt, Unrealized Losses |
(3,806)
|
(4,635)
|
Marketable Securities, Debt, Fair Value |
101,744
|
128,056
|
Cash and Cash Equivalents |
5,804
|
1,966
|
Current Marketable Securities |
18,326
|
34,611
|
Non-Current Marketable Securities |
77,614
|
91,479
|
Cash |
|
|
Marketable Securities [Line Items] |
|
|
Cash |
26,686
|
27,199
|
Cash and Cash Equivalents |
26,686
|
27,199
|
Money market funds | Level 1 |
|
|
Marketable Securities [Line Items] |
|
|
Marketable Securities, Equity, Adjusted Cost |
3,779
|
778
|
Marketable Securities, Equity, Unrealized Gains |
0
|
0
|
Marketable Securities, Equity, Unrealized Losses |
0
|
0
|
Marketable Securities, Equity, Fair Value |
3,779
|
778
|
Cash and Cash Equivalents |
3,779
|
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 |
646
|
515
|
Marketable Securities, Equity, Unrealized Gains |
134
|
105
|
Marketable Securities, Equity, Unrealized Losses |
(3)
|
(3)
|
Marketable Securities, Equity, Fair Value |
777
|
617
|
Cash and Cash Equivalents |
0
|
0
|
Current Marketable Securities |
777
|
617
|
Non-Current Marketable Securities |
0
|
0
|
U.S. Treasury securities | Level 2 |
|
|
Marketable Securities [Line Items] |
|
|
Marketable Securities, Debt, Adjusted Cost |
15,775
|
16,150
|
Marketable Securities, Debt, Unrealized Gains |
46
|
45
|
Marketable Securities, Debt, Unrealized Losses |
(362)
|
(516)
|
Marketable Securities, Debt, Fair Value |
15,459
|
15,679
|
Cash and Cash Equivalents |
1,030
|
212
|
Current Marketable Securities |
3,649
|
4,087
|
Non-Current Marketable Securities |
10,780
|
11,380
|
U.S. agency securities | Level 2 |
|
|
Marketable Securities [Line Items] |
|
|
Marketable Securities, Debt, Adjusted Cost |
5,383
|
5,431
|
Marketable Securities, Debt, Unrealized Gains |
0
|
0
|
Marketable Securities, Debt, Unrealized Losses |
(189)
|
(272)
|
Marketable Securities, Debt, Fair Value |
5,194
|
5,159
|
Cash and Cash Equivalents |
647
|
155
|
Current Marketable Securities |
2,030
|
703
|
Non-Current Marketable Securities |
2,517
|
4,301
|
Non-U.S. government securities | Level 2 |
|
|
Marketable Securities [Line Items] |
|
|
Marketable Securities, Debt, Adjusted Cost |
6,756
|
17,959
|
Marketable Securities, Debt, Unrealized Gains |
43
|
93
|
Marketable Securities, Debt, Unrealized Losses |
(567)
|
(484)
|
Marketable Securities, Debt, Fair Value |
6,232
|
17,568
|
Cash and Cash Equivalents |
297
|
1,158
|
Current Marketable Securities |
795
|
10,810
|
Non-Current Marketable Securities |
5,140
|
5,600
|
Certificates of deposit and time deposits | Level 2 |
|
|
Marketable Securities [Line Items] |
|
|
Marketable Securities, Debt, Adjusted Cost |
3,177
|
873
|
Marketable Securities, Debt, Unrealized Gains |
0
|
0
|
Marketable Securities, Debt, Unrealized Losses |
0
|
0
|
Marketable Securities, Debt, Fair Value |
3,177
|
873
|
Cash and Cash Equivalents |
3,113
|
387
|
Current Marketable Securities |
51
|
478
|
Non-Current Marketable Securities |
13
|
8
|
Commercial paper | Level 2 |
|
|
Marketable Securities [Line Items] |
|
|
Marketable Securities, Debt, Adjusted Cost |
710
|
1,066
|
Marketable Securities, Debt, Unrealized Gains |
0
|
0
|
Marketable Securities, Debt, Unrealized Losses |
0
|
0
|
Marketable Securities, Debt, Fair Value |
710
|
1,066
|
Cash and Cash Equivalents |
710
|
28
|
Current Marketable Securities |
0
|
1,038
|
Non-Current Marketable Securities |
0
|
0
|
Corporate debt securities | Level 2 |
|
|
Marketable Securities [Line Items] |
|
|
Marketable Securities, Debt, Adjusted Cost |
49,671
|
65,622
|
Marketable Securities, Debt, Unrealized Gains |
212
|
270
|
Marketable Securities, Debt, Unrealized Losses |
(1,251)
|
(1,953)
|
Marketable Securities, Debt, Fair Value |
48,632
|
63,939
|
Cash and Cash Equivalents |
7
|
26
|
Current Marketable Securities |
11,576
|
16,027
|
Non-Current Marketable Securities |
37,049
|
47,886
|
Municipal securities | Level 2 |
|
|
Marketable Securities [Line Items] |
|
|
Marketable Securities, Debt, Adjusted Cost |
263
|
412
|
Marketable Securities, Debt, Unrealized Gains |
0
|
0
|
Marketable Securities, Debt, Unrealized Losses |
(3)
|
(7)
|
Marketable Securities, Debt, Fair Value |
260
|
405
|
Cash and Cash Equivalents |
0
|
0
|
Current Marketable Securities |
157
|
190
|
Non-Current Marketable Securities |
103
|
215
|
Mortgage- and asset-backed securities | Level 2 |
|
|
Marketable Securities [Line Items] |
|
|
Marketable Securities, Debt, Adjusted Cost |
23,424
|
24,595
|
Marketable Securities, Debt, Unrealized Gains |
90
|
175
|
Marketable Securities, Debt, Unrealized Losses |
(1,434)
|
(1,403)
|
Marketable Securities, Debt, Fair Value |
22,080
|
23,367
|
Cash and Cash Equivalents |
0
|
0
|
Current Marketable Securities |
68
|
1,278
|
Non-Current Marketable Securities |
$ 22,012
|
$ 22,089
|