Leases - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2024	Oct. 31, 2023	Jan. 31, 2024
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term	5 years 10 months 24 days		5 years 10 months 24 days		6 years 2 months 12 days
Weighted average discount rate	2.93%		2.93%		2.86%
Public income remaining lease term			7 years 3 months 18 days
Sublease income	$ 2,000,000	$ 2,000,000	$ 6,000,000	$ 6,000,000
Sublease income payments			66,000,000
Sublease income payments, expect to receive, for fiscal 2025 through fiscal 2029	36,000,000		36,000,000
Sublease income payments, expect to receive, thereafter	30,000,000		30,000,000
Aggregate purchase commitments	$ 0		$ 0
Minimum
Lessee, Lease, Description [Line Items]
Operating lease remaining lease term	1 year		1 year
Lease renewal term	1 year		1 year
Optional termination period	1 year		1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating lease remaining lease term	65 years		65 years
Lease renewal term	8 years		8 years
Optional termination period	5 years		5 years