Commitments and Contingencies (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2024	Jul. 31, 2023	May 31, 2024	Jan. 31, 2024
Other Commitments [Line Items]
Sublease income	$ 1,900,000	$ 3,100,000	$ 4,300,000	$ 6,200,000
Cost of matching contributions	0	$ 0	0	$ 0
Loss contingency accrual	0		0			$ 0
Letters of credit outstanding	17,500,000		17,500,000
Minimum
Other Commitments [Line Items]
Loss contingency, range of possible loss	0		0
Maximum
Other Commitments [Line Items]
Loss contingency, range of possible loss	25,000,000		$ 25,000,000
New Office Facility Lease In The US
Other Commitments [Line Items]
Lessee, operating lease, liability, to be paid					$ 95,600,000
Increase in operating lease right-of-use assets	35,200,000
Increase in operating lease liabilities	$ 38,300,000