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Cash Equivalents and Marketable Securities (Tables)
 9 Months Ended
Oct. 26, 2025
Investments, Debt and Equity Securities [Abstract]  
Schedule of Cash Equivalents and Marketable Securities The following is a summary of cash equivalents and marketable securities:
 Oct 26, 2025
Pricing CategoryAmortized
Cost		Unrealized
Gain		Unrealized
Loss		Estimated
Fair Value		Reported as
 Cash EquivalentsMarketable Securities
 (In millions)
Debt securities issued by the U.S. TreasuryLevel 2$22,032 $188 $— $22,220 $665 $21,555 
Corporate debt securitiesLevel 221,588 172 (1)21,759 320 21,439 
Money market fundsLevel 18,610 — — 8,610 8,610 — 
Debt securities issued by U.S. government agenciesLevel 22,206 12 — 2,218 — 2,218 
Certificates of depositLevel 2104 — — 104 104 — 
Foreign government bonds
Level 240 1 — 41 — 41 
Total debt securities with fair value adjustments recorded in other comprehensive income54,580 373 (1)54,952 9,699 45,253 
Publicly-held equity securities (1)
Level 13,869 — 3,869 
Total$54,580 $373 $(1)$58,821 $9,699 $49,122 
(1)    In the first quarter of fiscal year 2026, one investment was reclassified from non-marketable equity securities to marketable securities following public market trading.
 Jan 26, 2025
Pricing CategoryAmortized
Cost		Unrealized
Gain		Unrealized
Loss		Estimated
Fair Value		Reported as
 Cash EquivalentsMarketable Securities
 (In millions)
Corporate debt securitiesLevel 2$18,504 $51 $(29)$18,526 $2,071 $16,455 
Debt securities issued by the U.S. TreasuryLevel 216,749 42 (22)16,769 1,801 14,968 
Money market fundsLevel 13,760 — — 3,760 3,760 — 
Debt securities issued by U.S. government agenciesLevel 22,775 7 (5)2,777 — 2,777 
Foreign government bondsLevel 2177 — — 177 137 40 
Certificates of depositLevel 297 — — 97 97 — 
Total debt securities with fair value adjustments recorded in other comprehensive income42,062 100 (56)42,106 7,866 34,240 
Publicly-held equity securities
Level 1381 — 381 
Total$42,062 $100 $(56)$42,487 $7,866 $34,621 
The estimated fair value of debt securities included in cash equivalents and marketable securities are shown below by contractual maturity.
Oct 26, 2025
(In millions)
Less than one year$21,848 
Due in 1 - 5 years33,104 
Total$54,952 
Schedule of Investments in a Continuous Unrealized Loss Position
The following table provides the breakdown of unrealized losses, aggregated by investment category and length of time that individual debt securities have been in a continuous loss position:
Oct 26, 2025Jan 26, 2025
 Less than 12 MonthsLess than 12 Months
 Estimated Fair ValueGross Unrealized LossEstimated Fair ValueGross Unrealized Loss
 (In millions)
Debt securities issued by the U.S. Treasury$1,223 $— $6,315 $(22)
Corporate debt securities899 (1)5,291 (29)
Debt securities issued by U.S. government agencies75 — 816 (5)
Total$2,197 $(1)$12,422 $(56)