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Note 23 (Detail) (USD $) | Apr. 30, 2013 | Oct. 31, 2012 | Feb. 09, 2011 | Apr. 30, 2013 Net [Member] Subsidiary Issuer [Member] | Apr. 30, 2013 Subsidiary Issuer [Member] Senior Notes [Member] | Apr. 30, 2013 Subsidiary Issuer [Member] | Apr. 30, 2013 Tangible Equity Units [Member] | Apr. 30, 2013 Senior Exchangeable Notes Due 2017 [Member] | Apr. 30, 2013 The 6.00% Exchangable Note Units [Member] | Oct. 02, 2012 The 6.00% Exchangable Note Units [Member] | Apr. 30, 2013 Senior Amortizing Notes [Member] Fair Value, Inputs, Level 3 [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Tangible Equity Units, Rate | 7.25% |  |  | 7.25% |  |  |  | 7.25% |  |  |  |
Number of Wholly Owned Subsidiaries | 1 |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  | $ 460,600,000 | $ 992,000,000 |  | $ 64,900,000 |  | $ 100,000,000 |
Secured Debt | 978,000,000 |  |  |  | 978,000,000 |  |  |  |  |  |  |
Senior Notes, Unsecured | 459,000,000 |  |  |  | 459,000,000 |  |  |  | 64,900,000 |  |  | 23,100,000
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  | 6.00% |  | 6.00% | 6.00% |
Subordinated Debt | $ 4,180,000 | $ 6,091,000 | [1] |  |  |  | $ 4,200,000 | $ 4,200,000 |  |  |  |
[1] | Derived from the audited balance sheet as of October 31, 2012.

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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest second claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off after secured debt and before any payments are made to junior note holders. + References No definition available. + Details
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- Definition Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 + Details
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 10 -Section F Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Article 5 -Subsection 19, 20, 22 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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