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Pension and other postretirement plans (Tables)
 6 Months Ended
Apr. 30, 2022
Retirement Benefits [Abstract]  
Components of Net Periodic Benefits Cost
The components of net periodic pension cost for the three and six months ended April 30, 2022 and 2021 were:
 U.S.International
Three Months Ended2022202120222021
Service cost$4,728 $5,722 $431 $662 
Interest cost4,241 3,494 290 250 
Expected return on plan assets(8,511)(7,335)(367)(431)
Amortization of prior service cost (credit)12 (21)(13)(88)
Amortization of net actuarial loss2,318 4,042 593 1,011 
Settlement loss41,221 2,018 — — 
Total benefit cost$44,009 $7,920 $934 $1,404 
 U.S.International
Six Months Ended2022202120222021
Service cost$9,915 $11,488 $920 $1,180 
Interest cost7,824 6,834 588 470 
Expected return on plan assets(16,389)(14,088)(761)(822)
Amortization of prior service cost (credit)24 (41)(30)(165)
Amortization of net actuarial loss5,084 7,616 1,200 1,801 
Settlement loss41,221 2,018 — — 
Total benefit cost$47,679 $13,827 $1,917 $2,464 
The components of other postretirement benefit costs for the three and six months ended April 30, 2022 and 2021 were:
 U.S.International
Three Months Ended2022202120222021
Service cost$148 $216 $3 $3 
Interest cost474 456 3 3 
Amortization of net actuarial (gain) loss226 338 (12)(10)
Total benefit cost (income)$848 $1,010 $(6)$(4)
 U.S.International
Six Months Ended2022202120222021
Service cost$343 $392 $6 $7 
Interest cost962 910 6 6 
Amortization of net actuarial (gain) loss489 685 (24)(20)
Total benefit cost (income)$1,794 $1,987 $(12)$(7)