Consolidated Statements of Changes in Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Stockholders' Equity [Member]	Noncontrolling Interest [Member]
Shares, Issued at Oct. 31, 2015		177,931
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Oct. 31, 2015	$ 4,228,079	$ 1,779	$ 728,125	$ 3,595,202	$ (100,040)	$ (2,509)	$ 4,222,557	$ 5,522
Net income	$ 382,095			382,095			382,095
Purchase of treasury stock, shares	(13,652)
Purchase of treasury stock, value	$ (392,772)				(392,772)		(392,772)
Exercise of stock options and stock-based compensation issuances, shares		6
Exercise of stock options and stock-based compensation issuances, value	(9,524)		(26,294)		16,770		(9,524)
Employee stock purchase issuances, shares
Employee stock purchase issuances, value	1,084		(46)		1,130		1,084
Stock-based compensation	26,679		26,679				26,679
Other Comprehensive Income (Loss)	(827)					(827)	(827)
Income (loss) attributable to noncontrolling interest	(16)						0	(16)
Noncontrolling Interest, Period Increase (Decrease)	404						0	404
Shares, Issued at Oct. 31, 2016		177,937
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Oct. 31, 2016	4,235,202	$ 1,779	728,464	3,977,297	(474,912)	(3,336)	4,229,292	5,910
Net income	$ 535,495			535,495			535,495
Purchase of treasury stock, shares	(7,694)
Purchase of treasury stock, value	$ (290,881)				(290,881)		(290,881)
Exercise of stock options and stock-based compensation issuances, shares
Exercise of stock options and stock-based compensation issuances, value	64,903		(36,896)		101,799		64,903
Employee stock purchase issuances, shares
Employee stock purchase issuances, value	1,221		81		1,140		1,221
Stock-based compensation	28,466		28,466				28,466
Dividends	(38,728)			(38,728)			(38,728)
Other Comprehensive Income (Loss)	1,426					1,426	1,426
Income (loss) attributable to noncontrolling interest	(14)						0	(14)
Shares, Issued at Oct. 31, 2017		177,937
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Oct. 31, 2017	4,537,090	$ 1,779	720,115	4,474,064	(662,854)	(1,910)	4,531,194	5,896
Net income	$ 748,151			748,151			748,151
Purchase of treasury stock, shares	(12,108)
Purchase of treasury stock, value	$ (503,159)				(503,159)		(503,159)
Exercise of stock options and stock-based compensation issuances, shares
Exercise of stock options and stock-based compensation issuances, value	12,180		(21,789)		33,969		12,180
Employee stock purchase issuances, shares
Employee stock purchase issuances, value	1,209		43		1,166		1,209
Stock-based compensation	28,312		28,312				28,312
Dividends	(62,077)			(62,077)			(62,077)
Other Comprehensive Income (Loss)	2,926					2,926	2,926
Income (loss) attributable to noncontrolling interest	(15)						0	(15)
Noncontrolling Interest, Period Increase (Decrease)	2,832						0	2,832
Shares, Issued at Oct. 31, 2018		177,937
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Oct. 31, 2018	4,768,912	$ 1,779	727,053	5,161,551	(1,130,878)	694	4,760,199	8,713
Cumulative Effect of New Accounting Principle in Period of Adoption	$ 1,463		$ 372	$ 1,413		$ (322)	$ 1,463