Leases Weighted Average Lease Terms and Discount Rate (Details)	Jan. 31, 2021	Jan. 31, 2020
Leases [Abstract]
Operating Lease, Weighted Average Remaining Lease Term	5 years	4 years
Finance Lease, Weighted Average Remaining Lease Term	2 years	2 years
Operating Lease, Weighted Average Discount Rate, Percent	2.70%	3.50%
Finance Lease, Weighted Average Discount Rate, Percent	2.90%	3.50%