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Financial Instruments And Fair Value Measurements - Estimated Fair Values for the Company's Senior Notes and the Assets Held by Special Purpose Entities (Detail) - USD ($) $ in Millions | Jul. 31, 2015 | Oct. 31, 2014
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Estimated Fair Value Of Financial Instruments [Line Items] |  |
Assets held by special purpose entities Estimated fair value | $ 50.9 | $ 50.9
Estimate of Fair Value Measurement [Member] |  |
Estimated Fair Value Of Financial Instruments [Line Items] |  |
Assets held by special purpose entities Estimated fair value | 54.4 | 54.5
Senior Notes Due 2017 [Member] | Estimate of Fair Value Measurement [Member] |  |
Estimated Fair Value Of Financial Instruments [Line Items] |  |
Estimated fair value | 317.3 | 325.5
Senior Notes Due 2019 [Member] | Estimate of Fair Value Measurement [Member] |  |
Estimated Fair Value Of Financial Instruments [Line Items] |  |
Estimated fair value | 278.1 | 287.5
Senior Notes Due 2021 [Member] | Estimate of Fair Value Measurement [Member] |  |
Estimated Fair Value Of Financial Instruments [Line Items] |  |
Estimated fair value | $ 260.7 | $ 297.7

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- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13433-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13476-108611 + Details
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- Definition The carrying amount of the consolidated Variable Interest Entity's assets included in the reporting entity's statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=52262685&loc=d3e5710-111685 + Details
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