Cash, Cash Equivalents and Short-Term Investments - Schedule of Unrealized Losses Cash Equivalents and Short Term Investment (Details) - USD ($) $ in Thousands	Oct. 31, 2023	Jan. 31, 2023
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Less than 12 months, carrying value	$ 590,572	$ 577,591
Less than 12 months, gross unrealized losses	(1,902)	(4,908)
More than 12 months or greater, carrying value	108,727	0
More than 12 months or greater, gross unrealized losses	(938)	0
Fair Value	699,299	577,591
Gross Unrealized Losses	(2,840)	(4,908)
U.S. Agency securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Less than 12 months, carrying value	42,820	73,724
Less than 12 months, gross unrealized losses	(154)	(435)
More than 12 months or greater, carrying value	15,006	0
More than 12 months or greater, gross unrealized losses	(159)	0
Fair Value	57,826	73,724
Gross Unrealized Losses	(313)	(435)
Commercial paper
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Less than 12 months, carrying value	54,711	45,015
Less than 12 months, gross unrealized losses	(29)	(112)
More than 12 months or greater, carrying value	0	0
More than 12 months or greater, gross unrealized losses	0	0
Fair Value	54,711	45,015
Gross Unrealized Losses	(29)	(112)
Corporate debt securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Less than 12 months, carrying value	188,536	75,203
Less than 12 months, gross unrealized losses	(1,229)	(572)
More than 12 months or greater, carrying value	15,405	0
More than 12 months or greater, gross unrealized losses	(164)	0
Fair Value	203,941	75,203
Gross Unrealized Losses	(1,393)	(572)
Municipal bonds
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Less than 12 months, carrying value		1,970
Less than 12 months, gross unrealized losses		(19)
More than 12 months or greater, carrying value		0
More than 12 months or greater, gross unrealized losses		0
Fair Value		1,970
Gross Unrealized Losses		(19)
Foreign government bonds
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Less than 12 months, carrying value	0	2,170
Less than 12 months, gross unrealized losses	0	(41)
More than 12 months or greater, carrying value	2,246	0
More than 12 months or greater, gross unrealized losses	(3)	0
Fair Value	2,246	2,170
Gross Unrealized Losses	(3)	(41)
U.S. Treasury securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Less than 12 months, carrying value	304,505	379,509
Less than 12 months, gross unrealized losses	(490)	(3,729)
More than 12 months or greater, carrying value	76,070	0
More than 12 months or greater, gross unrealized losses	(612)	0
Fair Value	380,575	379,509
Gross Unrealized Losses	$ (1,102)	$ (3,729)