Income Per Share Information (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015	Sep. 05, 2012
Earnings Per Share [Abstract]
Net Income Attributable to Parent	$ 105,483	$ 66,749	$ 267,717	$ 216,004
Interest on Convertible Debt, Net of Tax	388	393	1,165	1,179
Net Income Available to Common Stockholders, Diluted	$ 105,871	$ 67,142	$ 268,882	$ 217,183
Basic weighted-average shares	165,919	176,797	169,692	176,443
Common stock equivalents	1,628	2,478	1,853	2,391
Incremental Common Shares Attributable to Conversion of Debt Securities	5,858	5,858	5,858	5,858
Diluted weighted-average shares	173,405	185,133	177,403	184,692
Debt Instrument [Line Items]
Shares Issued under Stock Incentive and Employee Stock Purchase Plans	19	55	502	1,320
Zero Point Five Percent Exchangeable Senior Notes Due Two Thousand and Thirty Two [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					0.50%
Restricted Stock Units RSU And Employee Stock Option Member [Member]
Debt Instrument [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	4,243	1,572	3,854	1,918