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Fair Value Measurements (Tables)
 12 Months Ended
Jan. 31, 2022
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 January 31, 2022
Fair ValueLevel 1Level 2Level 3
(in thousands)
Financial Assets:
Money market funds$688,722 $688,722 $— $— 
Treasury bills107,496 — 107,496 — 
Corporate debt securities749 — 749 — 
Cash equivalents796,967 688,722 108,245 — 
Commercial paper28,723 — 28,723 — 
Agency bonds629,609 — 629,609 — 
Corporate and other debt securities280,927 — 280,927 — 
U.S. government agency securities3,027,509 — 3,027,509 — 
Treasury bills389,678 — 389,678 — 
Marketable securities4,356,446 — 4,356,446 — 
Certificates of deposit included in other assets, noncurrent297 — 297 — 
Publicly held equity securities included in strategic investments168,784 168,784 — — 
Privately held debt securities included in strategic investments14,231 — — 14,231 
Total financial assets$5,336,725 $857,506 $4,464,988 $14,231 
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