Capital Stock & Accelerated Share Repurchase (Details) (USD $)	0 Months Ended		12 Months Ended
	Feb. 28, 2012	Jan. 05, 2012	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010	Dec. 16, 2005 Common Stock Open Market Purchase Program [Member]	Sep. 30, 2004 Common Stock Open Market Purchase Program [Member]	Dec. 16, 2005 ASR Program [Member]	Mar. 06, 2009 Common Stock Open Market Purchase Program and ASR Program [Member]	Dec. 16, 2005 Common Stock Open Market Purchase Program and ASR Program [Member]	Oct. 31, 2012 Employee Stock Purchase Plan [Member]	Oct. 31, 2012 Dividend Reinvestment Plan [Member]	Oct. 31, 2012 Share Based Compensation Plans [Member]
Capital Stock And Accelerated Share Repurchase Details [Abstract]
Common Stock, Shares, Outstanding, Beginning Balance			72,318,000	72,282,000	73,266,000
Common Stock, Value, Issued, Beginning Balance			$ 446,791,000	$ 445,640,000	$ 471,569,000
Stock Issued During Period Shares Employee Stock Purchase Plans (ESPP)			30,000	30,000	35,000
Stock Issued During Period Value Employee Stock Purchase Plan (ESPP)			894,000	870,000	899,000
Stock Issued During Period Shares Dividend Reinvestment Plan (DRIP)			677,000	657,000	676,000
Stock Issued During Period Value Dividend Reinvestment Plan (DRIP)			20,508,000	18,834,000	17,663,000
Shares Repurchased During Period Shares Accelerated Share Repurchase (ASR) Plan		(800,000)	(800,000)	(800,000)	(1,800,000)
Common Stock Repurchased			(26,528,000)	(23,004,000)	(47,276,000)
Shares Issued During Period Shares Incentive Compensation Plan (ICP)			25,000	149,000	106,000
Shares Issued During Period Value Incentive Compensation Plan (ICP)			796,000	4,451,000	2,804,000
Shares Repurchased During Period Shares Recission Offer					(1,000)
Shares Repurchased During Period Value Recission Offer					(19,000)
Common Stock, Shares, Outstanding, Ending Balance			72,250,000	72,318,000	72,282,000
Common Stock, Value, Issued, Ending Balance			442,461,000	446,791,000	445,640,000
Accelerated Share Repurchases Initial Price Paid Per Share		$ 33.77
Stock Repurchased During Period Value At Initial Price ASR Plan		27,000,000
Accelerated Share Repurchases Settlement Payment Or Receipt	$ (500,000)
Accelerated Share Repurchases Weighted Average Purchase Price Per Share	$ 33.2500
Accelerated Share Repurchases Discount On Weighted Average Purchase Price Per Share	$ 0.09
Accelerated Share Repurchases Final Price Paid Per Share	$ 33.1600
Common Stock Reserved For Future Issuance			2,143,000								243,000	754,000	1,146,000
Class of Stock [Line Items]
Common Stock Reserved For Future Issuance			2,143,000								243,000	754,000	1,146,000
Authorized Common Stock Repurchases Shares						6,000,000	3,000,000			10,000,000
Additional Authorized Common Stock Repurchases Shares								4,000,000	4,000,000