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Financial Instruments - Cash, Cash Equivalents and Marketable Securities (Details) - USD ($)
$ in Millions
Apr. 01, 2023
Sep. 24, 2022
Marketable Securities [Line Items]    
Cash, Cash Equivalents and Marketable Securities, Adjusted Cost $ 177,228 $ 183,061
Cash Equivalents and Marketable Securities, Unrealized Gains 67 11
Cash Equivalents and Marketable Securities, Unrealized Losses (10,962) (13,963)
Cash, Cash Equivalents and Marketable Securities, Fair Value 166,333 169,109
Cash and Cash Equivalents 24,687 23,646
Current Marketable Securities 31,185 24,658
Non-Current Marketable Securities 110,461 120,805
Total marketable securities that were restricted from general use 13,100 12,700
Level 1    
Marketable Securities [Line Items]    
Marketable Securities, Equity, Adjusted Cost 2,001 3,203
Marketable Securities, Equity, Unrealized Gains 5 0
Marketable Securities, Equity, Unrealized Losses (26) (47)
Marketable Securities, Equity, Fair Value 1,980 3,156
Cash and Cash Equivalents 1,656 2,929
Current Marketable Securities 324 227
Non-Current Marketable Securities 0 0
Level 2    
Marketable Securities [Line Items]    
Marketable Securities, Debt, Adjusted Cost 155,177 161,312
Marketable Securities, Debt, Unrealized Gains 62 11
Marketable Securities, Debt, Unrealized Losses (10,936) (13,916)
Marketable Securities, Debt, Fair Value 144,303 147,407
Cash and Cash Equivalents 2,981 2,171
Current Marketable Securities 30,861 24,431
Non-Current Marketable Securities 110,461 120,805
Cash    
Marketable Securities [Line Items]    
Cash 20,050 18,546
Cash and Cash Equivalents 20,050 18,546
Current Marketable Securities 0 0
Non-Current Marketable Securities 0 0
Money market funds | Level 1    
Marketable Securities [Line Items]    
Marketable Securities, Equity, Adjusted Cost 1,656 2,929
Marketable Securities, Equity, Unrealized Gains 0 0
Marketable Securities, Equity, Unrealized Losses 0 0
Marketable Securities, Equity, Fair Value 1,656 2,929
Cash and Cash Equivalents 1,656 2,929
Current Marketable Securities 0 0
Non-Current Marketable Securities 0 0
Mutual funds | Level 1    
Marketable Securities [Line Items]    
Marketable Securities, Equity, Adjusted Cost 345 274
Marketable Securities, Equity, Unrealized Gains 5 0
Marketable Securities, Equity, Unrealized Losses (26) (47)
Marketable Securities, Equity, Fair Value 324 227
Cash and Cash Equivalents 0 0
Current Marketable Securities 324 227
Non-Current Marketable Securities 0 0
U.S. Treasury securities | Level 2    
Marketable Securities [Line Items]    
Marketable Securities, Debt, Adjusted Cost 22,754 25,134
Marketable Securities, Debt, Unrealized Gains 1 0
Marketable Securities, Debt, Unrealized Losses (1,262) (1,725)
Marketable Securities, Debt, Fair Value 21,493 23,409
Cash and Cash Equivalents 9 338
Current Marketable Securities 8,002 5,091
Non-Current Marketable Securities 13,482 17,980
U.S. agency securities | Level 2    
Marketable Securities [Line Items]    
Marketable Securities, Debt, Adjusted Cost 5,743 5,823
Marketable Securities, Debt, Unrealized Gains 0 0
Marketable Securities, Debt, Unrealized Losses (538) (655)
Marketable Securities, Debt, Fair Value 5,205 5,168
Cash and Cash Equivalents 0 0
Current Marketable Securities 199 240
Non-Current Marketable Securities 5,006 4,928
Non-U.S. government securities | Level 2    
Marketable Securities [Line Items]    
Marketable Securities, Debt, Adjusted Cost 17,380 16,948
Marketable Securities, Debt, Unrealized Gains 20 2
Marketable Securities, Debt, Unrealized Losses (961) (1,201)
Marketable Securities, Debt, Fair Value 16,439 15,749
Cash and Cash Equivalents 0 0
Current Marketable Securities 10,222 8,806
Non-Current Marketable Securities 6,217 6,943
Certificates of deposit and time deposits | Level 2    
Marketable Securities [Line Items]    
Marketable Securities, Debt, Adjusted Cost 2,999 2,067
Marketable Securities, Debt, Unrealized Gains 0 0
Marketable Securities, Debt, Unrealized Losses 0 0
Marketable Securities, Debt, Fair Value 2,999 2,067
Cash and Cash Equivalents 2,881 1,805
Current Marketable Securities 118 262
Non-Current Marketable Securities 0 0
Commercial paper | Level 2    
Marketable Securities [Line Items]    
Marketable Securities, Debt, Adjusted Cost 271 718
Marketable Securities, Debt, Unrealized Gains 0 0
Marketable Securities, Debt, Unrealized Losses 0 0
Marketable Securities, Debt, Fair Value 271 718
Cash and Cash Equivalents 0 28
Current Marketable Securities 271 690
Non-Current Marketable Securities 0 0
Corporate debt securities | Level 2    
Marketable Securities [Line Items]    
Marketable Securities, Debt, Adjusted Cost 82,802 87,148
Marketable Securities, Debt, Unrealized Gains 32 9
Marketable Securities, Debt, Unrealized Losses (6,049) (7,707)
Marketable Securities, Debt, Fair Value 76,785 79,450
Cash and Cash Equivalents 91 0
Current Marketable Securities 11,676 9,023
Non-Current Marketable Securities 65,018 70,427
Municipal securities | Level 2    
Marketable Securities [Line Items]    
Marketable Securities, Debt, Adjusted Cost 790 921
Marketable Securities, Debt, Unrealized Gains 0 0
Marketable Securities, Debt, Unrealized Losses (20) (35)
Marketable Securities, Debt, Fair Value 770 886
Cash and Cash Equivalents 0 0
Current Marketable Securities 257 266
Non-Current Marketable Securities 513 620
Mortgage- and asset-backed securities | Level 2    
Marketable Securities [Line Items]    
Marketable Securities, Debt, Adjusted Cost 22,438 22,553
Marketable Securities, Debt, Unrealized Gains 9 0
Marketable Securities, Debt, Unrealized Losses (2,106) (2,593)
Marketable Securities, Debt, Fair Value 20,341 19,960
Cash and Cash Equivalents 0 0
Current Marketable Securities 116 53
Non-Current Marketable Securities $ 20,225 $ 19,907