Leases - Narrative (Details) - USD ($)	3 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Jan. 31, 2024
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term	6 years		6 years 2 months 12 days
Weighted average discount rate	2.89%		2.86%
Public income remaining lease term	7 years 9 months 18 days
Sublease income	$ 2,000,000	$ 2,000,000
Sublease income payments	70,000,000
Sublease income payments, expect to receive, for fiscal 2025 through fiscal 2029	40,000,000
Sublease income payments, expect to receive, thereafter	30,000,000
operating lease minimum lease payments	$ 0
Minimum
Lessee, Lease, Description [Line Items]
Operating lease remaining lease term	1 year
Lease renewal term	1 year
Optional termination period	1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating lease remaining lease term	66 years
Lease renewal term	8 years
Optional termination period	6 years