Financial Instruments - Cash, Cash Equivalents and Marketable Securities (Details) - USD ($)
$ in Millions |
Sep. 26, 2026 |
Sep. 27, 2025 |
| Marketable Securities [Line Items] |
|
|
| Cash, Cash Equivalents and Marketable Securities, Adjusted Cost |
$ 140,970
|
$ 134,711
|
| Cash Equivalents and Marketable Securities, Unrealized Gains |
303
|
736
|
| Cash Equivalents and Marketable Securities, Unrealized Loss |
(4,338)
|
(3,027)
|
| Cash, Cash Equivalents and Marketable Securities, Fair Value |
136,935
|
132,420
|
| Cash and Cash Equivalents |
36,305
|
35,934
|
| Current Marketable Securities |
20,417
|
18,763
|
| Non-Current Marketable Securities |
80,213
|
77,723
|
| Level 1 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Equity, Adjusted Cost |
1,809
|
5,951
|
| Marketable Securities, Equity, Unrealized Gains |
243
|
177
|
| Marketable Securities, Equity, Unrealized Losses |
(4)
|
(2)
|
| Marketable Securities, Equity, Fair Value |
2,048
|
6,126
|
| Cash and Cash Equivalents |
897
|
5,272
|
| Current Marketable Securities |
1,151
|
854
|
| Non-Current Marketable Securities |
0
|
0
|
| Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
106,475
|
100,493
|
| Marketable Securities, Debt, Unrealized Gains |
60
|
559
|
| Marketable Securities, Debt, Unrealized Losses |
(4,334)
|
(3,025)
|
| Marketable Securities, Debt, Fair Value |
102,201
|
98,027
|
| Cash and Cash Equivalents |
2,722
|
2,395
|
| Current Marketable Securities |
19,266
|
17,909
|
| Non-Current Marketable Securities |
80,213
|
77,723
|
| Cash |
|
|
| Marketable Securities [Line Items] |
|
|
| Cash |
32,686
|
28,267
|
| Cash and Cash Equivalents |
32,686
|
28,267
|
| Money market funds | Level 1 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Equity, Adjusted Cost |
897
|
5,272
|
| Marketable Securities, Equity, Unrealized Gains |
0
|
0
|
| Marketable Securities, Equity, Unrealized Losses |
0
|
0
|
| Marketable Securities, Equity, Fair Value |
897
|
5,272
|
| Cash and Cash Equivalents |
897
|
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 |
912
|
679
|
| Marketable Securities, Equity, Unrealized Gains |
243
|
177
|
| Marketable Securities, Equity, Unrealized Losses |
(4)
|
(2)
|
| Marketable Securities, Equity, Fair Value |
1,151
|
854
|
| Cash and Cash Equivalents |
0
|
0
|
| Current Marketable Securities |
1,151
|
854
|
| Non-Current Marketable Securities |
0
|
0
|
| U.S. Treasury securities | Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
19,413
|
16,074
|
| Marketable Securities, Debt, Unrealized Gains |
1
|
56
|
| Marketable Securities, Debt, Unrealized Losses |
(507)
|
(282)
|
| Marketable Securities, Debt, Fair Value |
18,907
|
15,848
|
| Cash and Cash Equivalents |
27
|
1,190
|
| Current Marketable Securities |
4,793
|
3,712
|
| Non-Current Marketable Securities |
14,087
|
10,946
|
| U.S. agency securities | Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
5,164
|
5,269
|
| Marketable Securities, Debt, Unrealized Gains |
0
|
0
|
| Marketable Securities, Debt, Unrealized Losses |
(106)
|
(149)
|
| Marketable Securities, Debt, Fair Value |
5,058
|
5,120
|
| Cash and Cash Equivalents |
565
|
251
|
| Current Marketable Securities |
2,459
|
2,456
|
| Non-Current Marketable Securities |
2,034
|
2,413
|
| Non-U.S. government securities | Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
5,171
|
6,586
|
| Marketable Securities, Debt, Unrealized Gains |
25
|
111
|
| Marketable Securities, Debt, Unrealized Losses |
(504)
|
(424)
|
| Marketable Securities, Debt, Fair Value |
4,692
|
6,273
|
| Cash and Cash Equivalents |
0
|
0
|
| Current Marketable Securities |
310
|
855
|
| Non-Current Marketable Securities |
4,382
|
5,418
|
| Certificates of deposit and time deposits | Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
2,334
|
917
|
| Marketable Securities, Debt, Unrealized Gains |
0
|
0
|
| Marketable Securities, Debt, Unrealized Losses |
0
|
0
|
| Marketable Securities, Debt, Fair Value |
2,334
|
917
|
| Cash and Cash Equivalents |
2,030
|
904
|
| Current Marketable Securities |
304
|
0
|
| Non-Current Marketable Securities |
0
|
13
|
| Commercial paper | Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
1,486
|
100
|
| Marketable Securities, Debt, Unrealized Gains |
0
|
0
|
| Marketable Securities, Debt, Unrealized Losses |
0
|
0
|
| Marketable Securities, Debt, Fair Value |
1,486
|
100
|
| Cash and Cash Equivalents |
0
|
50
|
| Current Marketable Securities |
1,486
|
50
|
| Non-Current Marketable Securities |
0
|
0
|
| Corporate debt securities | Level 2 |
|
|
| Marketable Securities [Line Items] |
|
|
| Marketable Securities, Debt, Adjusted Cost |
48,229
|
47,210
|
| Marketable Securities, Debt, Unrealized Gains |
29
|
266
|
| Marketable Securities, Debt, Unrealized Losses |
(1,323)
|
(916)
|
| Marketable Securities, Debt, Fair Value |
46,935
|
46,560
|
| Cash and Cash Equivalents |
100
|
0
|
| Current Marketable Securities |
9,875
|
10,623
|
| Non-Current Marketable Securities |
36,960
|
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 |
24,678
|
24,130
|
| Marketable Securities, Debt, Unrealized Gains |
5
|
126
|
| Marketable Securities, Debt, Unrealized Losses |
(1,894)
|
(1,252)
|
| Marketable Securities, Debt, Fair Value |
22,789
|
23,004
|
| Cash and Cash Equivalents |
0
|
0
|
| Current Marketable Securities |
39
|
94
|
| Non-Current Marketable Securities |
$ 22,750
|
$ 22,910
|