v3.25.1
Accumulated other comprehensive loss - Summary of Accumulated Other Comprehensive Loss (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Apr. 30, 2025
Jan. 31, 2025
Apr. 30, 2024
Jan. 31, 2024
Apr. 30, 2025
Apr. 30, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Beginning balance $ 2,876,611 $ 2,932,192 $ 2,723,967 $ 2,598,060 $ 2,932,192 $ 2,598,060
Pension and other postretirement plan adjustments, net of tax of $10         (92)  
Foreign currency translation adjustments (a) 95,605 (51,679) (32,620) 43,943 43,926 11,323
Ending balance 2,960,304 2,876,611 2,788,271 2,723,967 2,960,304 2,788,271
Amortization of prior service costs and net actuarial losses, tax         10  
Other Comprehensive Income (Loss), Net Investment Hedge, Tax         6,154  
Other Comprehensive Income (Loss), Net Investment Hedge, Gross         (20,602)  
Accumulated Other Comprehensive Income (Loss)            
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Beginning balance (236,007) (184,840) (152,957) (196,441) (184,840) (196,441)
Foreign currency translation adjustments (a) 95,605 (51,679) (32,620) 43,943    
Ending balance (140,822) (236,007) $ (185,558) $ (152,957) (140,822) $ (185,558)
Cumulative translation adjustments            
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Beginning balance   (116,890)     (116,890)  
Pension and other postretirement plan adjustments, net of tax of $10         0  
Foreign currency translation adjustments (a)         43,926  
Ending balance (72,964)       (72,964)  
Pension and postretirement  benefit plan adjustments            
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Beginning balance   $ (67,950)     (67,950)  
Pension and other postretirement plan adjustments, net of tax of $10         (92)  
Foreign currency translation adjustments (a)         0  
Ending balance $ (67,858)       $ (67,858)