Pension and Retirement Savings Plan - Weighted-average Assumptions Used to Calculate Benefit Obligations (Details)	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate	0.20%	0.00%	0.00%
Salary progression rate	1.10%	1.10%	1.10%
Expected long-term rate of return on plan assets	1.50%	1.50%	1.50%