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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, unless otherwise specified | Jul. 31, 2014 | Oct. 31, 2013
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Senior Notes Due 2017 [Member] |  |
Estimated Fair Value Of Financial Instruments [Line Items] |  |
Estimated fair value | $ 327.0 | $ 334.5
Senior Notes Due 2019 [Member] |  |
Estimated Fair Value Of Financial Instruments [Line Items] |  |
Estimated fair value | 288.8 | 289.9
Senior Notes Due 2021 [Member] |  |
Estimated Fair Value Of Financial Instruments [Line Items] |  |
Estimated fair value | 320.8 | 317.9
Assets held by special purpose entities [Member] |  |
Estimated Fair Value Of Financial Instruments [Line Items] |  |
Estimated fair value | $ 54.2 | $ 50.1

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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=35750535&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=35750535&loc=d3e13476-108611 + Details
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