Condensed Consolidated Statements of Comprehensive Income (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 86,981	$ 93,928	$ 231,064	$ 234,418
Components of other comprehensive income (loss):
Foreign currency translation adjustments	28,943	(7,172)	10,509	227
Amortization of prior service cost and net actuarial losses, net of tax	2,621	2,378	9,748	5,328
Total other comprehensive income (loss)	31,564	(4,794)	20,257	5,555
Total comprehensive income	$ 118,545	$ 89,134	$ 251,321	$ 239,973