Leases - Summary of Information Related to Remaining Lease Term and Discount Rate (Details)	Jan. 31, 2021	Jan. 31, 2020
Leases [Abstract]
Weighted average remaining lease term, Operating leases (in years)	5 years 9 months 7 days	6 years 8 months 1 day
Weighted average remaining lease term, Finance leases (in years)	2 years 4 months 6 days	2 years 11 months 4 days
Weighted average discount rate, Operating leases	5.27%	5.40%
Weighted average discount rate, Finance leases	4.44%	4.56%