Commitment and Contingencies - Narrative (Details) - USD ($)	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	May 31, 2022
Other Commitments [Line Items]
Sublease income	$ 3,400,000	$ 3,200,000
Lessee, Lease, lease not yet commenced, undiscounted amount	38,500,000
Cost of matching contributions	0	$ 0
Letters of credit outstanding	$ 17,000,000
Subsequent Event
Other Commitments [Line Items]
Lessee, Lease, lease not yet commenced, undiscounted amount			$ 68,000,000
Minimum
Other Commitments [Line Items]
Lessee, lease, lease not yet commenced, term of contract (in years)	1 year 10 months 24 days
Maximum
Other Commitments [Line Items]
Lessee, lease, lease not yet commenced, term of contract (in years)	10 years