v3.24.1.1.u2
Cash Equivalents and Marketable Securities
 3 Months Ended
Apr. 28, 2024
Investments, Debt and Equity Securities [Abstract]  
Cash Equivalents and Marketable Securities Cash Equivalents and Marketable Securities 
Our cash equivalents and marketable securities related to publicly held debt securities are classified as “available-for-sale” debt securities.
The following is a summary of cash equivalents and marketable securities:
 Apr 28, 2024
Amortized
Cost		Unrealized
Gain		Unrealized
Loss		Estimated
Fair Value		Reported as
 Cash EquivalentsMarketable Securities
 (In millions)
Corporate debt securities$11,397 $3 $(43)$11,357 $733 $10,624 
Debt securities issued by the U.S. Treasury11,314 — (62)11,252 886 10,366 
Money market funds5,374 — — 5,374 5,374 — 
Debt securities issued by U.S. government agencies2,826 — (7)2,819 189 2,630 
Certificates of deposit286 — — 286 69 217 
Foreign government bonds14 — — 14 — 14 
Total$31,211 $3 $(112)$31,102 $7,251 $23,851 
 Jan 28, 2024
Amortized
Cost		Unrealized
Gain		Unrealized
Loss		Estimated
Fair Value		Reported as
 Cash EquivalentsMarketable Securities
 (In millions)
Corporate debt securities$10,126 $31 $(5)$10,152 $2,231 $7,921 
Debt securities issued by the U.S. Treasury9,517 17 (10)9,524 1,315 8,209 
Money market funds3,031 — — 3,031 3,031 — 
Debt securities issued by U.S. government agencies2,326 8 (1)2,333 89 2,244 
Certificates of deposit510 — — 510 294 216 
Foreign government bonds174 — — 174 60 114 
Total$25,684 $56 $(16)$25,724 $7,020 $18,704 
The following tables provide the breakdown of unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous loss position:
Apr 28, 2024
 Less than 12 Months12 Months or GreaterTotal
 Estimated Fair ValueGross Unrealized LossEstimated Fair ValueGross Unrealized LossEstimated Fair ValueGross Unrealized Loss
 (In millions)
Debt securities issued by the U.S. Treasury$9,720 $(60)$756 $(2)$10,476 $(62)
Corporate debt securities6,943 (42)188 (1)7,131 (43)
Debt securities issued by U.S. government agencies2,391 (7)— — 2,391 (7)
Total$19,054 $(109)$944 $(3)$19,998 $(112)
Jan 28, 2024
 Less than 12 Months12 Months or GreaterTotal
 Estimated Fair ValueGross Unrealized LossEstimated Fair ValueGross Unrealized LossEstimated Fair ValueGross Unrealized Loss
 (In millions)
Debt securities issued by the U.S. Treasury$3,343 $(5)$1,078 $(5)$4,421 $(10)
Corporate debt securities1,306 (3)618 (2)1,924 (5)
Debt securities issued by U.S. government agencies670 (1)— — 670 (1)
Total$5,319 $(9)$1,696 $(7)$7,015 $(16)
The gross unrealized losses are related to fixed income securities, driven primarily by changes in interest rates. Net realized gains and losses were not significant for all periods presented.
The amortized cost and estimated fair value of cash equivalents and marketable securities are shown below by contractual maturity.
Apr 28, 2024Jan 28, 2024
Amortized CostEstimated Fair ValueAmortized CostEstimated Fair Value
(In millions)
Less than one year$16,811 $16,800 $16,336 $16,329 
Due in 1 - 5 years14,400 14,302 9,348 9,395 
Total$31,211 $31,102 $25,684 $25,724