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Pension and other postretirement plans (Tables)
 9 Months Ended
Jul. 31, 2024
Retirement Benefits [Abstract]  
Components of Net Periodic Benefits Cost
The components of net periodic pension and other postretirement cost for the three and nine months ended July 31, 2024 and 2023 were:
 U.S.International
Three Months Ended2024202320242023
Service cost$2,507 $2,744 $231 $281 
Interest cost4,752 4,176 688 642 
Expected return on plan assets(6,652)(6,529)(417)(392)
Amortization of prior service credit— — (2)(13)
Amortization of net actuarial loss— — 7 20 
Settlement loss56 — — — 
Total benefit cost$663 $391 $507 $538 
 U.S.International
Nine Months Ended2024202320242023
Service cost$7,522 $8,233 $702 $838 
Interest cost14,257 12,526 2,062 1,887 
Expected return on plan assets(19,958)(19,587)(1,250)(1,151)
Amortization of prior service credit— — (6)(38)
Amortization of net actuarial loss— — 24 61 
Settlement loss56 — — — 
Total benefit cost$1,877 $1,172 $1,532 $1,597 
The components of other postretirement benefit costs for the three and nine months ended July 31, 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)(16)
Total benefit cost (income)$677 $866 $(10)$(12)
 U.S.International
Nine Months Ended2024202320242023
Service cost$211 $299 $4 $4 
Interest cost2,262 2,297 10 8 
Amortization of net actuarial gain(443)— (43)(47)
Total benefit cost (income)$2,030 $2,596 $(29)$(35)