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Financial Instruments (Tables)
 3 Months Ended
Dec. 27, 2025
Financial Instruments [Abstract]  
Cash, Cash Equivalents and Marketable Securities by Significant Investment Category
The following tables show the Company’s cash, cash equivalents and marketable securities by significant investment category as of December 27, 2025 and September 27, 2025 (in millions):
December 27, 2025
Adjusted
Cost		Unrealized
Gains		Unrealized
Losses		Fair
Value		Cash and
Cash
Equivalents		Current
Marketable
Securities
Non-Current
Marketable
Securities
Cash$30,826 $— $— $30,826 $30,826 $— $— 
Level 1:
Money market funds5,959 — — 5,959 5,959 — — 
Mutual funds
792 195 (2)985 — 985 — 
Subtotal6,751 195 (2)6,944 5,959 985 — 
Level 2 (1):
U.S. Treasury securities18,715 64 (211)18,568 2,302 5,341 10,925 
U.S. agency securities8,692 1 (114)8,579 4,192 1,998 2,389 
Non-U.S. government securities6,675 117 (399)6,393 — 771 5,622 
Certificates of deposit and time deposits1,737 — — 1,737 1,723 — 14 
Commercial paper991 — — 991 297 694 — 
Corporate debt securities46,682 280 (695)46,267 18 11,568 34,681 
Municipal securities154 — (1)153 — 97 56 
Mortgage- and asset-backed securities25,296 158 (1,117)24,337 — 136 24,201 
Subtotal108,942 620 (2,537)107,025 8,532 20,605 77,888 
Total
$146,519 $815 $(2,539)$144,795 $45,317 $21,590 $77,888 
September 27, 2025
Adjusted
Cost		Unrealized
Gains		Unrealized
Losses		Fair
Value		Cash and
Cash
Equivalents		Current
Marketable
Securities		Non-Current
Marketable
Securities
Cash$28,267 $— $— $28,267 $28,267 $— $— 
Level 1:
Money market funds5,272 — — 5,272 5,272 — — 
Mutual funds
679 177 (2)854 — 854 — 
Subtotal5,951 177 (2)6,126 5,272 854 — 
Level 2 (1):
U.S. Treasury securities16,074 56 (282)15,848 1,190 3,712 10,946 
U.S. agency securities5,269 — (149)5,120 251 2,456 2,413 
Non-U.S. government securities6,586 111 (424)6,273 — 855 5,418 
Certificates of deposit and time deposits917 — — 917 904 — 13 
Commercial paper100 — — 100 50 50 — 
Corporate debt securities47,210 266 (916)46,560 — 10,623 35,937 
Municipal securities207 — (2)205 — 119 86 
Mortgage- and asset-backed securities24,130 126 (1,252)23,004 — 94 22,910 
Subtotal100,493 559 (3,025)98,027 2,395 17,909 77,723 
Total
$134,711 $736 $(3,027)$132,420 $35,934 $18,763 $77,723 
(1)The valuation techniques used to measure the fair values of the Company’s Level 2 financial instruments, which generally have counterparties with high credit ratings, are based on quoted market prices or model-driven valuations using significant inputs derived from or corroborated by observable market data.
Notional Amounts of Outstanding Derivative Instruments
The notional amounts of the Company’s outstanding derivative instruments as of December 27, 2025 and September 27, 2025, were as follows (in millions):
December 27,
2025		September 27,
2025
Derivative instruments designated as accounting hedges:
Foreign exchange contracts$46,619 $62,647 
Interest rate contracts$12,875 $12,875 
Derivative instruments not designated as accounting hedges:
Foreign exchange contracts$120,980 $109,079