CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2022	Oct. 31, 2021
Statement of Comprehensive Income [Abstract]
Net loss	$ (208,897)	$ (221,311)	$ (662,082)	$ (607,225)
Other comprehensive loss:
Net change in unrealized gains or losses on available-for-sale securities	(7,896)	(2,998)	(26,595)	(4,164)
Foreign currency translation adjustments	(6,982)	(973)	(17,460)	(822)
Other comprehensive loss	(14,878)	(3,971)	(44,055)	(4,986)
Comprehensive loss	$ (223,775)	$ (225,282)	$ (706,137)	$ (612,211)