Revenue, Accounts Receivable, Deferred Revenue, and Remaining Performance Obligations - Revenue from External Customers by Geographic Areas (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 497,248	$ 272,198	$ 919,619	$ 501,112
United States
Disaggregation of Revenue [Line Items]
Revenue	394,284	217,382	730,209	403,567
Other
Disaggregation of Revenue [Line Items]
Revenue	10,553	6,137	19,679	11,157
EMEA
Disaggregation of Revenue [Line Items]
Revenue	69,666	39,304	127,684	69,478
Asia-Pacific and Japan
Disaggregation of Revenue [Line Items]
Revenue	$ 22,745	$ 9,375	$ 42,047	$ 16,910