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Long-Term Debt (Details) - USD ($)
$ in Millions
6 Months Ended
Jul. 31, 2024
Jan. 31, 2024
Long-Term Debt    
Letters of credit outstanding $ 0.2 $ 0.2
Revolving credit facility | Senior secured credit facility    
Long-Term Debt    
Maturity term (year) 5 years  
Available for use $ 350.0  
Long-term line of credit drawn amount 0.0  
Revolving credit facility | Senior secured credit facility | Maximum    
Long-Term Debt    
Line of credit facility 500.0  
Revolving credit facility | Senior secured credit facility | Minimum    
Long-Term Debt    
Line of credit facility $ 350.0  
Senior secured credit facility | Maximum    
Long-Term Debt    
Percentage of undrawn amounts (in percentage) 0.40%  
Senior secured credit facility | Maximum | Canada or US prime rate, CORRA or SOFR    
Long-Term Debt    
Interest rates under the revolving operating portion 2.50%  
Senior secured credit facility | Minimum    
Long-Term Debt    
Percentage of undrawn amounts (in percentage) 0.20%  
Senior secured credit facility | Minimum | Canada or US prime rate, CORRA or SOFR    
Long-Term Debt    
Interest rates under the revolving operating portion 0.00%