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Investments (Tables)
 9 Months Ended
Oct. 31, 2024
Investments, Debt and Equity Securities [Abstract]  
Summary of Debt Securities
As of October 31, 2024, debt securities consisted of the following (in millions):
Amortized CostUnrealized GainsUnrealized LossesAggregate Fair Value
U.S. treasury securities$1,660 $5 $(1)$1,664 
U.S. agency obligations694 2 0 696 
Corporate bonds3,058 12 (2)3,068 
Commercial paper566 0 0 566 
Total debt securities$5,978 $19 $(3)$5,994 
Included in Cash and cash equivalents$148 $0 $0 $148 
Included in Marketable securities$5,830 $19 $(3)$5,846 
As of January 31, 2024, debt securities consisted of the following (in millions):
Amortized CostUnrealized GainsUnrealized LossesAggregate Fair Value
U.S. treasury securities$2,072 $4 $(2)$2,074 
U.S. agency obligations753 2 (1)754 
Corporate bonds2,496 9 (5)2,500 
Commercial paper1,232 0 0 1,232 
Total debt securities$6,553 $15 $(8)$6,560 
Included in Cash and cash equivalents$759 $0 $0 $759 
Included in Marketable securities$5,794 $15 $(8)$5,801 
Contractual Maturity of Debt Securities
The fair values of debt securities, by remaining contractual maturity, were as follows (in millions):
October 31, 2024
Due within 1 year$2,983 
Due in 1 year through 5 years3,011 
Total debt securities$5,994 
Aggregate Fair Value and Gross Unrealized Losses for Debt Securities In Unrealized Loss Position The following tables summarize the aggregate fair value and gross unrealized losses for all debt securities in an unrealized loss position, aggregated by investment category and the length of time that individual securities have been in a continuous loss position (in millions):
As of October 31, 2024
Less than 12 Months
12 Months or Greater
Total
Fair ValueUnrealized LossFair ValueUnrealized LossFair ValueUnrealized Loss
U.S. treasury securities$266 $(1)$120 $0 $386 $(1)
U.S. agency obligations142 0 15 0 157 0 
Corporate bonds640 (2)184 0 824 (2)
Total
$1,048 $(3)$319 $0 $1,367 $(3)
As of January 31, 2024
Less than 12 Months
12 Months or Greater
Total
Fair ValueUnrealized LossFair ValueUnrealized LossFair ValueUnrealized Loss
U.S. treasury securities$921 $(2)$78 $(1)$999 $(3)
U.S. agency obligations234 0 100 (1)334 (1)
Corporate bonds921 (3)171 (1)1,092 (4)
Commercial paper
5 0 0 0 5 0 
Total
$2,081 $(5)$349 $(3)$2,430 $(8)
Equity Investments
Equity investments consisted of the following (in millions):
Condensed Consolidated Balance Sheets LocationOctober 31, 2024January 31, 2024
Money market funds Cash and cash equivalents$849 $1,017 
Non-marketable equity investments measured using the measurement alternative Other assets242 248 
Total equity investments$1,091 $1,265 
Realized and Unrealized Gains and Losses With Equity Investments
Total realized and unrealized gains and losses associated with our equity investments were as follows (in millions):
Three Months Ended October 31, Nine Months Ended October 31,
2024202320242023
Net realized gains (losses) recognized on equity investments sold (1)
$0 $(1)$(3)$2 
Net unrealized gains (losses) recognized on equity investments held as of the end of the period3 (13)(4)(24)
Total net gains (losses) recognized in Other income (expense), net$3 $(14)$(7)$(22)
(1)Reflects the difference between the sale proceeds and the carrying value of the equity investments at the beginning of the period.
Carrying Values Of Non-marketable Equity Investments The carrying values for our non-marketable equity investments are summarized below (in millions):
October 31, 2024January 31, 2024
Total initial cost$210 $213 
Cumulative net unrealized gains (losses)32 35 
Carrying value$242 $248