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Pension and other postretirement plans (Tables)
 6 Months Ended
Apr. 30, 2024
Retirement Benefits [Abstract]  
Components of Net Periodic Benefits Cost
The components of net periodic pension and other postretirement cost for the three and six months ended April 30, 2024 and 2023 were:
 U.S.International
Three Months Ended2024202320242023
Service cost$2,507 $2,744 $234 $283 
Interest cost4,752 4,176 685 642 
Expected return on plan assets(6,652)(6,529)(416)(383)
Amortization of prior service credit— — (2)(13)
Amortization of net actuarial loss— — 8 21 
Total benefit cost$607 $391 $509 $550 
 U.S.International
Six months ended2024202320242023
Service cost$5,015 $5,488 $471 $558 
Interest cost9,505 8,351 1,374 1,245 
Expected return on plan assets(13,306)(13,058)(833)(760)
Amortization of prior service credit— — (4)(26)
Amortization of net actuarial loss— — 17 41 
Total benefit cost$1,214 $781 $1,025 $1,058 
The components of other postretirement benefit costs for the three and six months ended April 30, 2024 and 2023 were:
 U.S.International
Three Months Ended2024202320242023
Service cost$70 $100 $1 $1 
Interest cost754 766 3 3 
Amortization of net actuarial gain(147)— (14)(15)
Total benefit cost (income)$677 $866 $(10)$(11)
 U.S.International
Six months ended2024202320242023
Service cost$141 $200 $2 $2 
Interest cost1,508 1,531 7 6 
Amortization of net actuarial gain(295)— (29)(31)
Total benefit cost (income)$1,354 $1,731 $(20)$(23)