Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 124,144	$ 92,079	$ 201,726	$ 144,083
Components of other comprehensive income (loss):
Foreign currency translation adjustments	(6,943)	(21,227)	21,490	(18,434)
Amortization of prior service cost and net actuarial losses, net of tax	8,385	3,898	11,382	7,127
Total other comprehensive income (loss)	1,442	(17,329)	32,872	(11,307)
Total comprehensive income	$ 125,586	$ 74,750	$ 234,598	$ 132,776