Income Per Share Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013	Sep. 05, 2012 Zero Point Five Percent Exchangeable Senior Notes Due Two Thousand and Thirty Two [Member]
Debt Instrument [Line Items]
Net Income Attributable to Parent	$ 97,707	$ 46,595	$ 208,508	$ 75,701
Interest on Convertible Debt, Net of Tax	396	404	1,185	1,208
Net Income Available to Common Stockholders, Diluted	$ 98,103	$ 46,999	$ 209,693	$ 76,909
Basic weighted-average shares	178,217	169,268	177,591	169,237
Common stock equivalents	2,426	2,875	2,495	2,871
Incremental Common Shares Attributable to Conversion of Debt Securities	5,858	5,858	5,858	5,858
Diluted weighted-average shares	186,501	178,001	185,944	177,966
Weighted-Average Number of Anti-Dilutive Options and RSU's	1,830	1,198	1,560	1,159
Shares Issued under Stock Incentive and Employee Stock Purchase Plans	138	94	1,362	728
Debt Instrument, Interest Rate, Stated Percentage					0.50%