Income Per Share Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2015	Apr. 30, 2014	Sep. 05, 2012
Earnings Per Share [Abstract]
Net Income Attributable to Parent	$ 67,930	$ 65,222	$ 149,255	$ 110,802
Interest on Convertible Debt, Net of Tax	392	392	786	789
Net Income Available to Common Stockholders, Diluted	$ 68,322	$ 65,614	$ 150,041	$ 111,591
Basic weighted-average shares	176,458	178,082	176,267	177,278
Common stock equivalents	2,522	2,502	2,347	2,529
Incremental Common Shares Attributable to Conversion of Debt Securities	5,858	5,858	5,858	5,858
Diluted weighted-average shares	184,838	186,442	184,472	185,665
Debt Instrument [Line Items]
Shares Issued under Stock Incentive and Employee Stock Purchase Plans	588	212	1,265	1,225
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	1,814	1,249	2,091	1,426