Investments (Tables)

6 Months Ended

Jul. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Schedule of Marketable Securities

As of July 31, 2022 and January 31, 2022, our marketable securities consisted of the following: 

	As of July 31, 2022
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(in thousands)
Commercial paper	$	64,596	$	—	$	—	$	64,596
Agency bonds	654,632		165		(10,965)		643,832
Corporate and other debt securities	411,999		81		(3,615)		408,465
U.S. government agency securities	3,433,437		344		(49,538)		3,384,243
Treasury bills	81,819		—		(247)		81,572
Marketable securities	$	4,646,483	$	590	$	(64,365)	$	4,582,708

	As of January 31, 2022
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(in thousands)
Commercial paper	$	28,723	$	—	$	—	$	28,723
Agency bonds	632,935		2		(3,328)		629,609
Corporate and other debt securities	282,124		5		(1,202)		280,927
U.S. government agency securities	3,046,742		28		(19,261)		3,027,509
Treasury bills	389,826		—		(148)		389,678
Marketable securities	$	4,380,350	$	35	$	(23,939)	$	4,356,446

Schedule of Contractual Maturities of Marketable Securities

The following table presents the contractual maturities of our marketable securities as of July 31, 2022 and January 31, 2022:

	As of
	July 31, 2022		January 31, 2022
	(in thousands)
Less than one year	$	2,827,538	$	2,387,139
Due in one to five years	1,755,170		1,969,307
Total	$	4,582,708	$	4,356,446

Schedule of Strategic Investments

Strategic investments by form and measurement category as of July 31, 2022 were as follows:

	Measurement Category
	Fair Value		Measurement Alternative		Equity Method		Total
	(in thousands)
Equity securities	$	139,908	$	112,064	$	92,603	$	344,575
Debt securities	13,673		—		—		13,673
Strategic investments	$	153,581	$	112,064	$	92,603	$	358,248

Strategic investments by form and measurement category as of January 31, 2022 were as follows:

	Measurement Category
	Fair Value		Measurement Alternative		Equity Method		Total
	(in thousands)
Equity securities	$	168,784	$	91,399	$	93,400	$	353,583
Debt securities	14,231		—		—		14,231
Strategic investments	$	183,015	$	91,399	$	93,400	$	367,814