Earnings Per Share Information (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Sep. 05, 2012
Earnings Per Share [Abstract]
Net income as reported	$ 132,107	$ 70,416
Interest and costs attributable to 0.5% Exchangeable Senior Notes, net of income tax benefit		384
Numerator for diluted earnings per share	$ 132,107	$ 70,800
Basic weighted-average shares	155,882	162,588
Common stock equivalents	3,015	1,971
Shares attributable to 0.5% Exchangeable Senior Notes		5,858
Diluted weighted-average shares	158,897	170,417
Debt Instrument [Line Items]
Shares issued under stock incentive and employee stock purchase plans	823	1,280
Restricted Stock Units RSU And Employee Stock Option Member [Member]
Debt Instrument [Line Items]
Weighted-average number of antidilutive options and restricted stock units	545	5,204
0.5% Exchangeable Senior Notes Due 2032 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			0.50%