Condensed Consolidated Statements of Comprehensive Income (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 69,388	$ 77,879	$ 161,487	$ 174,693
Components of other comprehensive income (loss):
Translation adjustments	(12,003)	(4,769)	(42,564)	(3,517)
Amortization of prior service cost and net actuarial losses, net of tax	2,045	1,722	6,333	5,180
Total other comprehensive income (loss)	(9,958)	(3,047)	(36,231)	1,663
Total comprehensive income	$ 59,430	$ 74,832	$ 125,256	$ 176,356