Stock Based Benefit Plans (Details 6) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercised	2,467,000	2,498,000	4,436,000
Stock swap method [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercised	28,900	29,512	38,379
Shares tendered	14,807	14,459	9,237
Shares issued	14,093	15,053	29,142
Average fair market value per share withheld	20.53	19.71	21.4
Aggregate fair market value of shares withheld	304	285	198

Number of shares issued during the period as a result of any share-based compensation plan other than an employee stock ownership plan (ESOP).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 12

-Paragraph 10

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 5

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration