Income Per Share Information (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Apr. 30, 2015	Sep. 05, 2012
Earnings Per Share [Abstract]
Net Income Attributable to Parent	$ 89,054	$ 67,930	$ 162,234	$ 149,255
Interest on Convertible Debt, Net of Tax	388	392	777	786
Net Income Available to Common Stockholders, Diluted	$ 89,442	$ 68,322	$ 163,011	$ 150,041
Basic weighted-average shares	168,952	176,458	171,578	176,267
Common stock equivalents	1,604	2,522	1,967	2,347
Incremental Common Shares Attributable to Conversion of Debt Securities	5,858	5,858	5,858	5,858
Diluted weighted-average shares	176,414	184,838	179,403	184,472
Debt Instrument [Line Items]
Shares Issued under Stock Incentive and Employee Stock Purchase Plans	10	588	483	1,265
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	4,364	1,814	3,659	2,091