Financial Instruments - Cash, Cash Equivalents and Marketable Securities (Details) - USD ($)
$ in Millions |
Jun. 27, 2026 |
Sep. 27, 2025 |
| Marketable Securities [Line Items] |
|
|
| Cash, Cash Equivalents and Marketable Securities, Adjusted Cost |
$ 148,631
|
$ 134,711
|
| Cash Equivalents and Marketable Securities, Unrealized Gains |
490
|
736
|
| Cash Equivalents and Marketable Securities, Unrealized Losses |
(2,604)
|
(3,027)
|
| Cash, Cash Equivalents and Marketable Securities, Fair Value |
146,517
|
132,420
|
| Cash and Cash Equivalents |
39,544
|
35,934
|
| Current Marketable Securities |
22,855
|
18,763
|
| Non-Current
Marketable
Securities |
84,118
|
77,723
|
| Level 1 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Equity, Adjusted Cost |
8,713
|
5,951
|
| Marketable Securities, Equity, Unrealized Gains |
222
|
177
|
| Marketable Securities, Equity, Unrealized Losses |
(1)
|
(2)
|
| Marketable Securities, Equity, Fair Value |
8,934
|
6,126
|
| Cash and Cash Equivalents |
7,840
|
5,272
|
| Current Marketable Securities |
1,094
|
854
|
| Non-Current
Marketable
Securities |
0
|
0
|
| Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
113,141
|
100,493
|
| Marketable Securities, Debt, Unrealized Gains |
268
|
559
|
| Marketable Securities, Debt, Unrealized Losses |
(2,603)
|
(3,025)
|
| Marketable Securities, Debt, Fair Value |
110,806
|
98,027
|
| Cash and Cash Equivalents |
4,927
|
2,395
|
| Current Marketable Securities |
21,761
|
17,909
|
| Non-Current
Marketable
Securities |
84,118
|
77,723
|
| Cash |
|
|
| Marketable Securities [Line Items] |
|
|
| Cash |
26,777
|
28,267
|
| Cash and Cash Equivalents |
26,777
|
28,267
|
| Money market funds | Level 1 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Equity, Adjusted Cost |
7,840
|
5,272
|
| Marketable Securities, Equity, Unrealized Gains |
0
|
0
|
| Marketable Securities, Equity, Unrealized Losses |
0
|
0
|
| Marketable Securities, Equity, Fair Value |
7,840
|
5,272
|
| Cash and Cash Equivalents |
7,840
|
5,272
|
| Current Marketable Securities |
0
|
0
|
| Non-Current
Marketable
Securities |
0
|
0
|
| Mutual funds | Level 1 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Equity, Adjusted Cost |
873
|
679
|
| Marketable Securities, Equity, Unrealized Gains |
222
|
177
|
| Marketable Securities, Equity, Unrealized Losses |
(1)
|
(2)
|
| Marketable Securities, Equity, Fair Value |
1,094
|
854
|
| Cash and Cash Equivalents |
0
|
0
|
| Current Marketable Securities |
1,094
|
854
|
| Non-Current
Marketable
Securities |
0
|
0
|
| U.S. Treasury securities | Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
20,398
|
16,074
|
| Marketable Securities, Debt, Unrealized Gains |
11
|
56
|
| Marketable Securities, Debt, Unrealized Losses |
(253)
|
(282)
|
| Marketable Securities, Debt, Fair Value |
20,156
|
15,848
|
| Cash and Cash Equivalents |
735
|
1,190
|
| Current Marketable Securities |
4,034
|
3,712
|
| Non-Current
Marketable
Securities |
15,387
|
10,946
|
| U.S. agency securities | Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
6,176
|
5,269
|
| Marketable Securities, Debt, Unrealized Gains |
0
|
0
|
| Marketable Securities, Debt, Unrealized Losses |
(100)
|
(149)
|
| Marketable Securities, Debt, Fair Value |
6,076
|
5,120
|
| Cash and Cash Equivalents |
988
|
251
|
| Current Marketable Securities |
2,898
|
2,456
|
| Non-Current
Marketable
Securities |
2,190
|
2,413
|
| Non-U.S. government securities | Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
5,207
|
6,586
|
| Marketable Securities, Debt, Unrealized Gains |
71
|
111
|
| Marketable Securities, Debt, Unrealized Losses |
(349)
|
(424)
|
| Marketable Securities, Debt, Fair Value |
4,929
|
6,273
|
| Cash and Cash Equivalents |
0
|
0
|
| Current Marketable Securities |
299
|
855
|
| Non-Current
Marketable
Securities |
4,630
|
5,418
|
| Certificates of deposit and time deposits | Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
3,025
|
917
|
| Marketable Securities, Debt, Unrealized Gains |
0
|
0
|
| Marketable Securities, Debt, Unrealized Losses |
0
|
0
|
| Marketable Securities, Debt, Fair Value |
3,025
|
917
|
| Cash and Cash Equivalents |
2,521
|
904
|
| Current Marketable Securities |
504
|
0
|
| Non-Current
Marketable
Securities |
0
|
13
|
| Commercial paper | Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
3,828
|
100
|
| Marketable Securities, Debt, Unrealized Gains |
0
|
0
|
| Marketable Securities, Debt, Unrealized Losses |
0
|
0
|
| Marketable Securities, Debt, Fair Value |
3,828
|
100
|
| Cash and Cash Equivalents |
683
|
50
|
| Current Marketable Securities |
3,145
|
50
|
| Non-Current
Marketable
Securities |
0
|
0
|
| Corporate debt securities | Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
49,679
|
47,210
|
| Marketable Securities, Debt, Unrealized Gains |
121
|
266
|
| Marketable Securities, Debt, Unrealized Losses |
(709)
|
(916)
|
| Marketable Securities, Debt, Fair Value |
49,091
|
46,560
|
| Cash and Cash Equivalents |
0
|
0
|
| Current Marketable Securities |
10,808
|
10,623
|
| Non-Current
Marketable
Securities |
38,283
|
35,937
|
| Municipal securities | Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
|
207
|
| Marketable Securities, Debt, Unrealized Gains |
|
0
|
| Marketable Securities, Debt, Unrealized Losses |
|
(2)
|
| Marketable Securities, Debt, Fair Value |
|
205
|
| Cash and Cash Equivalents |
|
0
|
| Current Marketable Securities |
|
119
|
| Non-Current
Marketable
Securities |
|
86
|
| Mortgage- and asset-backed securities | Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
24,828
|
24,130
|
| Marketable Securities, Debt, Unrealized Gains |
65
|
126
|
| Marketable Securities, Debt, Unrealized Losses |
(1,192)
|
(1,252)
|
| Marketable Securities, Debt, Fair Value |
23,701
|
23,004
|
| Cash and Cash Equivalents |
0
|
0
|
| Current Marketable Securities |
73
|
94
|
| Non-Current
Marketable
Securities |
$ 23,628
|
$ 22,910
|