Equity - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Number of Stock Options Outstanding (in thousands)
Balance, beginning of period (in shares)	16,043,000	16,253,000	9,817,000
Options granted (in shares)	7,936,000	4,622,000	10,632,000
Options exercised (in shares)	(4,789,000)	(2,862,000)	(2,141,000)
Options cancelled (in shares)	(81,000)	(79,000)	(164,000)
Options forfeited (in shares)	(1,963,000)	(1,891,000)	(1,891,000)
Balance, end of period (in shares)	17,146,000	16,043,000	16,253,000	9,817,000
Exercisable (in shares)	17,146,000
Options vested (in shares)	4,968,000
Options expected to vest (in shares)	12,178,000
Weighted Average Exercise Price
Balance, beginning of period (in USD per share)	$ 6.33	$ 4.56	$ 1.67
Options granted (in USD per share)	18.68	11.27	6.20
Options exercised (in USD per share)	5.40	4.87	1.44
Options cancelled (in USD per share)	6.20	3.79	0.61
Options forfeited (in USD per share)	10.47	5.50	2.64
Balance, end of period (in USD per share)	11.83	$ 6.33	$ 4.56	$ 1.67
Options vested (in USD per share)	5.22
Options expected to vest (in USD per share)	$ 14.52
Weighted Average Remaining Years
Beginning balance (in years)	8 years 2 months 26 days	8 years 4 months 20 days	9 years 10 days	8 years 9 months 14 days
Options granted (in years)	8 years 6 months	9 years 1 month 9 days	8 years 11 months 26 days
Options exercised (in years)	5 years 25 days	5 years 6 months 21 days	4 years 10 months 28 days
Options vested (in years)	7 years 1 month 2 days
Options expected to vest (in years)	8 years 8 months 15 days
Aggregate Intrinsic value (in millions)
Beginning balance	$ 166.6	$ 70.6	$ 24.0
Ending balance	894.8	$ 166.6	$ 70.6	$ 24.0
Options vested	292.1
Options expected to vest	$ 602.8