Cost Savings Initiatives (Details) (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2017	Jan. 31, 2016	Apr. 30, 2015
Restructuring Cost And Reserve [Line Items]
Pre-tax charges		$ 1.3	$ 2.7
Cost Savings Initiatives | United States | Wholesale
Restructuring Cost And Reserve [Line Items]
Pre-tax charges	$ 3.8
Cost Savings Initiatives | International | Wholesale
Restructuring Cost And Reserve [Line Items]
Pre-tax charges	2.5
Cost Savings Initiatives | Severance and Payroll Related
Restructuring Cost And Reserve [Line Items]
Pre-tax charges	5.9
Cost Savings Initiatives | Severance and Payroll Related | SG&A
Restructuring Cost And Reserve [Line Items]
Pre-tax charges	4.5
Cost Savings Initiatives | Severance and Payroll Related | Cost of Sales
Restructuring Cost And Reserve [Line Items]
Pre-tax charges	1.4
Cost Savings Initiatives | Other | SG&A
Restructuring Cost And Reserve [Line Items]
Pre-tax charges	0.3
Cost Savings Initiatives | Occupancy charges | SG&A
Restructuring Cost And Reserve [Line Items]
Pre-tax charges	$ 0.1