v3.22.0.1
Cash Equivalents and Marketable Securities
 12 Months Ended
Jan. 30, 2022
Investments, Debt and Equity Securities [Abstract]  
Cash Equivalents and Marketable Securities Cash Equivalents and Marketable SecuritiesOur cash equivalents and marketable securities related to debt securities are classified as “available-for-sale” debt securities.
The following is a summary of cash equivalents and marketable securities as of January 30, 2022 and January 31, 2021:
 January 30, 2022
Amortized
Cost		Unrealized
Gain		Unrealized
Loss		Estimated
Fair Value		Reported as
 Cash EquivalentsMarketable Securities
 (In millions)
Corporate debt securities$9,977 $— $(3)$9,974 $1,102 $8,872 
Debt securities issued by the United States Treasury7,314 — (14)7,300 — 7,300 
Debt securities issued by United States government agencies1,612 — — 1,612 256 1,356 
Certificates of deposit1,561 — — 1,561 21 1,540 
Money market funds316 — — 316 316 — 
Foreign government bonds150 — — 150 — 150 
Total$20,930 $— $(17)$20,913 $1,695 $19,218 
 January 31, 2021
Amortized
Cost		Unrealized
Gain		Unrealized
Loss		Estimated
Fair Value		Reported as
 Cash EquivalentsMarketable Securities
 (In millions)
Corporate debt securities$4,442 $2 $— $4,444 $234 $4,210 
Debt securities issued by United States government agencies2,975 1 — 2,976 28 2,948 
Debt securities issued by the United States Treasury2,846 — — 2,846 25 2,821 
Certificates of deposit705 — — 705 37 668 
Money market funds313 — — 313 313 — 
Foreign government bonds67 — — 67 — 67 
Total$11,348 $3 $— $11,351 $637 $10,714 
The following table provides the breakdown of unrealized losses as of January 30, 2022, aggregated by investment category and length of time that individual securities have been in a continuous loss position:
 Less than 12 Months12 Months or GreaterTotal
 Estimated Fair ValueGross Unrealized LossEstimated Fair ValueGross Unrealized LossEstimated Fair ValueGross Unrealized Loss
 (In millions)
Corporate debt securities$2,445 $(3)$19 $— $2,464 $(3)
Debt securities issued by the United States Treasury5,292 (14)— — 5,292 (14)
Total$7,737 $(17)$19 $— $7,756 $(17)
Net realized gains and unrealized gains and losses were not significant for all periods presented.
The amortized cost and estimated fair value of cash equivalents and marketable securities as of January 30, 2022 and January 31, 2021 are shown below by contractual maturity.
 January 30, 2022January 31, 2021
 Amortized
Cost		Estimated
Fair Value		Amortized
Cost		Estimated
Fair Value
 (In millions)
Less than one year$16,346 $16,343 $10,782 $10,783 
Due in 1 - 5 years4,584 4,570 566 568 
Total$20,930 $20,913 $11,348 $11,351