Revenue Recognition - Summary Disaggregation of Revenue by Region (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 1,021,495	$ 663,520	$ 1,977,732	$ 991,687
Percentage of revenue	100.00%	100.00%	100.00%	100.00%
Americas
Disaggregation of Revenue [Line Items]
Revenue	$ 681,414	$ 454,160	$ 1,317,199	$ 699,793
Percentage of revenue	67.00%	69.00%	67.00%	71.00%
Asia Pacific (“APAC”)
Disaggregation of Revenue [Line Items]
Revenue	$ 135,321	$ 81,384	$ 259,084	$ 111,641
Percentage of revenue	13.00%	12.00%	13.00%	11.00%
Europe, Middle East, and Africa (“EMEA”)
Disaggregation of Revenue [Line Items]
Revenue	$ 204,760	$ 127,976	$ 401,449	$ 180,253
Percentage of revenue	20.00%	19.00%	20.00%	18.00%