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Cost Savings Initiatives (Details) (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jul. 31, 2017
Jan. 31, 2016
Apr. 30, 2015
Jul. 31, 2017
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 $ 0.1     2.6
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       0.4
Cost Savings Initiatives | Occupancy charges | SG&A        
Restructuring Cost And Reserve [Line Items]        
Pre-tax charges       $ 0.1