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]	Noncontrolling Interest [Member]
Shares, Issued at Oct. 31, 2013		169,353
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Oct. 31, 2013	$ 3,339,164	$ 1,694	$ 441,677	$ 2,892,003	$ 0	$ (2,387)	$ 6,177
Net income	340,032			340,032
Issuance of common stock, shares		7,188
Issuance of common stock, value	$ 220,438	$ 72	220,366
Purchase of treasury stock, shares	(2,947)
Purchase of treasury stock, value	$ (90,754)				(90,754)
Exercise of stock options and stock-based compensation issuances, shares		1,389
Exercise of stock options and stock-based compensation issuances, value	29,753	$ 13	28,197		1,543
Employee stock purchase issuances, shares
Employee stock purchase issuances, value	715		266		449
Stock-based compensation	21,656		21,656
Other Comprehensive Income (Loss)	(451)					(451)
Income (loss) attributable to noncontrolling interest	(28)						(28)
Capital contribution (distribution)	172						172
Shares, Issued at Oct. 31, 2014		177,930
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Oct. 31, 2014	3,860,697	$ 1,779	712,162	3,232,035	(88,762)	(2,838)	6,321
Net income	$ 363,167			363,167
Purchase of treasury stock, shares	(1,665)
Purchase of treasury stock, value	$ (56,888)				(56,888)
Exercise of stock options and stock-based compensation issuances, shares		1
Exercise of stock options and stock-based compensation issuances, value	37,826		(6,956)		44,782
Employee stock purchase issuances, shares
Employee stock purchase issuances, value	844		16		828
Stock-based compensation	22,903		22,903
Other Comprehensive Income (Loss)	329					329
Income (loss) attributable to noncontrolling interest	(14)						(14)
Capital contribution (distribution)	(785)						(785)
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)	5,522
Net income	$ 382,095			382,095
Purchase of treasury stock, shares	(13,652)
Purchase of treasury stock, value	$ (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
Employee stock purchase issuances, shares
Employee stock purchase issuances, value	1,084		(46)		1,130
Stock-based compensation	26,679		26,679
Other Comprehensive Income (Loss)	(827)					(827)
Income (loss) attributable to noncontrolling interest	(16)						(16)
Capital contribution (distribution)	404						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)	$ 5,910