Short-Term Investments - Schedule of Fair Values and Gross Unrealized Loss Position of Available-for-Sale Securities Aggregated by Investment Category (Details) - USD ($) $ in Thousands	Oct. 31, 2023	Jan. 31, 2023
Certificates of deposits
Debt Securities, Available-for-Sale [Line Items]
12 months or less, Fair value	$ 54,902	$ 15,934
12 months or less, Gross unrealized losses	(98)	(66)
Greater than 12 months, Fair value	0	0
Greater than 12 months, Gross unrealized losses	0	0
Asset-backed securities
Debt Securities, Available-for-Sale [Line Items]
12 months or less, Fair value	404,973	293,854
12 months or less, Gross unrealized losses	(3,469)	(3,219)
Greater than 12 months, Fair value	135,578	78,279
Greater than 12 months, Gross unrealized losses	(2,820)	(2,489)
Commercial paper
Debt Securities, Available-for-Sale [Line Items]
12 months or less, Fair value	180,899	144,741
12 months or less, Gross unrealized losses	(203)	(580)
Greater than 12 months, Fair value	0	0
Greater than 12 months, Gross unrealized losses	0	0
Corporate notes and bonds
Debt Securities, Available-for-Sale [Line Items]
12 months or less, Fair value	923,724	604,264
12 months or less, Gross unrealized losses	(11,218)	(6,801)
Greater than 12 months, Fair value	363,115	370,969
Greater than 12 months, Gross unrealized losses	(7,808)	(11,079)
Foreign government bonds
Debt Securities, Available-for-Sale [Line Items]
12 months or less, Fair value	22,269	11,284
12 months or less, Gross unrealized losses	(158)	(126)
Greater than 12 months, Fair value	9,680	11,827
Greater than 12 months, Gross unrealized losses	(264)	(390)
Municipal securities
Debt Securities, Available-for-Sale [Line Items]
12 months or less, Fair value	56,692
12 months or less, Gross unrealized losses	(547)
Greater than 12 months, Fair value	14,214
Greater than 12 months, Gross unrealized losses	(256)
U.S. agency obligations
Debt Securities, Available-for-Sale [Line Items]
12 months or less, Fair value	43,946	4,941
12 months or less, Gross unrealized losses	(223)	(61)
Greater than 12 months, Fair value	4,967	24,461
Greater than 12 months, Gross unrealized losses	(33)	(533)
U.S. treasury securities
Debt Securities, Available-for-Sale [Line Items]
12 months or less, Fair value	542,832	210,246
12 months or less, Gross unrealized losses	(5,613)	(3,661)
Greater than 12 months, Fair value	218,152	63,422
Greater than 12 months, Gross unrealized losses	$ (4,630)	$ (2,353)