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Business Segment Information - Net Sales to External Customers by Geographical Area (Detail) - USD ($) $ in Millions | 3 Months Ended
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Jan. 31, 2016 | Jan. 31, 2015
Net sales |  |
Total net sales | $ 771.4 | $ 902.3
United States [Member] |  |
Net sales |  |
Total net sales | 372.4 | 410.0
Europe, Middle East and Africa [Member] |  |
Net sales |  |
Total net sales | 276.2 | 319.4
Asia Pacific and Other Americas [Member] |  |
Net sales |  |
Total net sales | $ 122.8 | $ 172.9

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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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