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Fair Value Measurements (Tables)
9 Months Ended
Oct. 31, 2021
Fair Value Disclosures [Abstract]  
Schedule of Financial Instruments Measured at Fair Value on Recurring Basis
The following tables present information about our financial instruments that are measured at fair value on a recurring basis and indicate the fair value hierarchy of the valuation inputs utilized to determine such fair value:
As of October 31, 2021
Fair ValueLevel 1Level 2Level 3
(in thousands)
Financial Assets:
Money market funds$295,943 $295,943 $— $— 
Treasury bills576,668 — 576,668 — 
Cash equivalents872,611 295,943 576,668 — 
Commercial paper23,482 — 23,482 — 
Agency bonds437,453 — 437,453 — 
Corporate and other debt securities314,521 — 314,521 — 
U.S. government agency securities2,996,045 — 2,996,045 — 
Treasury bills324,019 — 324,019 — 
Marketable securities4,095,520 — 4,095,520 — 
Publicly held equity securities included in strategic investments179,918 179,918 — — 
Privately held debt securities included in strategic investments13,366 — — 13,366 
Certificates of deposit included in other assets, noncurrent297 — 297 — 
Total financial assets$5,161,712 $475,861 $4,672,485 $13,366 
As of January 31, 2021
Fair ValueLevel 1Level 2Level 3
(in thousands)
Financial Assets:
Money market funds$958,357 $958,357 $— $— 
Treasury bills618,498 — 618,498 — 
Cash equivalents1,576,855 958,357 618,498 — 
Commercial paper26,222 — 26,222 — 
Agency bonds461,365 — 461,365 — 
Corporate and other debt securities466,256 — 466,256 — 
U.S. government agency securities834,665 — 834,665 — 
Treasury bills215,902 — 215,902 — 
Marketable securities2,004,410 — 2,004,410 — 
Certificate of deposit included in prepaid expenses and other current assets100 — 100 — 
Certificates of deposit included in other assets, noncurrent2,238 — 2,238 — 
Privately held debt securities included in strategic investments5,130 — — 5,130 
Total financial assets$3,588,733 $958,357 $2,625,246 $5,130