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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, 2017 | Jul. 31, 2016 | Jul. 31, 2017 | Jul. 31, 2016
Net sales |  |  |  |
Total net sales | $ 961.8 | $ 845.0 | $ 2,670.1 | $ 2,456.0
United States |  |  |  |
Net sales |  |  |  |
Total net sales | 463.7 | 400.3 | 1,306.2 | 1,179.0
Europe, Middle East and Africa |  |  |  |
Net sales |  |  |  |
Total net sales | 359.4 | 318.9 | 970.8 | 905.9
Asia Pacific and other Americas |  |  |  |
Net sales |  |  |  |
Total net sales | $ 138.7 | $ 125.8 | $ 393.1 | $ 371.1

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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=63488584&loc=d3e20235-122688 + Details
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