Commitment and Contingencies - Narrative (Details) - USD ($)	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Other Commitments [Line Items]
Lessee, Lease, lease not yet commenced, undiscounted amount	$ 25,300,000
Cost of matching contributions	0	$ 0	$ 0
Letters of credit outstanding	$ 16,800,000
Minimum
Other Commitments [Line Items]
Lessee, lease, lease not yet commenced, term of contract (in years)	4 years 7 months 6 days
Maximum
Other Commitments [Line Items]
Lessee, lease, lease not yet commenced, term of contract (in years)	9 years 6 months