v3.25.2
Income taxes (Detail)
3 Months Ended 9 Months Ended
Jul. 31, 2025
Jul. 31, 2024
Jul. 31, 2025
Jul. 31, 2024
Income Tax Disclosure [Abstract]        
Effective tax rates 21.00% 21.50% 19.70% 21.10%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent     21.00%  
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent 19.40%   19.20%