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Employee Benefit Plans (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Jan. 31, 2022
Oct. 31, 2020
Jul. 31, 2021
Jan. 31, 2021
Defined Benefit Plan, Plan Assets, Allocation        
Curtailment charge $ 1.2 $ 0.8 $ 0.8  
Accumulated other comprehensive loss $ (140.1)   (118.2)  
Reclassification, Other        
Defined Benefit Plan, Plan Assets, Allocation        
Accumulated other comprehensive loss     $ 4.0 $ 1.7