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Income Taxes - Rate reconciliation (Details) - USD ($)
$ in Millions
12 Months Ended
Oct. 31, 2020
Oct. 31, 2019
Dec. 31, 2018
Oct. 31, 2018
Income Taxes        
Federal statutory tax rate 21.00% 21.00%   23.30%
State taxes, net of federal effects 4.40% 3.70%   3.60%
NOL carryback - CARES Act 6.20%      
Foreign income taxes greater than U.S. (2.30%) 0.40%   0.70%
Revaluation of deferred taxes       4.50%
Section 199 deduction       (1.90%)
Provision to return (2.50%) 0.70%   (1.20%)
Transition Tax       0.60%
State rate change (0.10%) (0.20%)   0.20%
Valuation allowance (2.70%)      
Other (0.30%) 0.40%   (1.40%)
Effective Income Tax Rate, Total 23.70% 26.00%   28.40%
Domestic operations income (loss) before taxes $ (18.9) $ 47.9 $ 45.8  
Foreign operations income (loss) before taxes $ 0.8 1.6 $ (1.1)  
Unrecognized tax benefits   $ 0.1