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Business Segment Information - Net Sales to External Customers by Geographical Area (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jul. 31, 2015 | Jul. 31, 2014 | Jul. 31, 2015 | Jul. 31, 2014
Net sales |  |  |  |
Total net sales | $ 930.0 | $ 1,124.0 | $ 2,748.2 | $ 3,191.0
United States [Member] |  |  |  |
Net sales |  |  |  |
Total net sales | 431.5 | 502.4 | 1,269.7 | 1,417.3
Europe, Middle East and Africa [Member] |  |  |  |
Net sales |  |  |  |
Total net sales | 337.3 | 428.2 | 979.5 | 1,216.7
Asia Pacific and Other Americas [Member] |  |  |  |
Net sales |  |  |  |
Total net sales | $ 161.2 | $ 193.4 | $ 499.0 | $ 557.0

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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