Cash, Cash Equivalents and Short-Term Investments - Schedule of Unrealized Losses Cash Equivalents and Short Term Investment (Details) - USD ($) $ in Thousands	Jul. 31, 2023	Jan. 31, 2023
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Less than 12 months, carrying value	$ 566,730	$ 577,591
Less than 12 months, gross unrealized losses	(2,399)	(4,908)
More than 12 months or greater, carrying value	117,551	0
More than 12 months or greater, gross unrealized losses	(1,156)	0
Fair Value	684,281	577,591
Gross Unrealized Losses	(3,555)	(4,908)
U.S. Agency securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Less than 12 months, carrying value	63,223	73,724
Less than 12 months, gross unrealized losses	(444)	(435)
More than 12 months or greater, carrying value	3,899	0
More than 12 months or greater, gross unrealized losses	(1)	0
Fair Value	67,122	73,724
Gross Unrealized Losses	(445)	(435)
Commercial paper
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Less than 12 months, carrying value	86,797	45,015
Less than 12 months, gross unrealized losses	(80)	(112)
More than 12 months or greater, carrying value	0	0
More than 12 months or greater, gross unrealized losses	0	0
Fair Value	86,797	45,015
Gross Unrealized Losses	(80)	(112)
Corporate debt securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Less than 12 months, carrying value	153,562	75,203
Less than 12 months, gross unrealized losses	(969)	(572)
More than 12 months or greater, carrying value	18,869	0
More than 12 months or greater, gross unrealized losses	(179)	0
Fair Value	172,431	75,203
Gross Unrealized Losses	(1,148)	(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	2,216	0
More than 12 months or greater, gross unrealized losses	(19)	0
Fair Value	2,216	2,170
Gross Unrealized Losses	(19)	(41)
U.S. Treasury securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Less than 12 months, carrying value	263,148	379,509
Less than 12 months, gross unrealized losses	(906)	(3,729)
More than 12 months or greater, carrying value	92,567	0
More than 12 months or greater, gross unrealized losses	(957)	0
Fair Value	355,715	379,509
Gross Unrealized Losses	$ (1,863)	$ (3,729)