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Pension and Other Postretirement Plans - Net Periodic Benefit Cost (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Apr. 30, 2017
Apr. 30, 2016
Apr. 30, 2017
Apr. 30, 2016
Pension Plan, United States [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 3,184 $ 2,984 $ 6,243 $ 5,745
Interest cost 3,243 4,032 6,454 7,966
Expected return on plan assets (5,265) (4,914) (10,443) (9,833)
Amortization of prior service cost (credit) 11 19 23 38
Amortization of net actuarial loss 2,457 2,314 4,785 4,240
Total benefit cost 3,630 4,435 7,062 8,156
Pension Plan, International [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 625 719 1,159 1,420
Interest cost 419 609 768 1,222
Expected return on plan assets (358) (377) (643) (765)
Amortization of prior service cost (credit) (76) (24) (147) (45)
Amortization of net actuarial loss 662 471 1,261 936
Total benefit cost $ 1,272 $ 1,398 $ 2,398 $ 2,768