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Business Segment Information - Net Sales to External Customers by Geographical Area (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2017 | Apr. 30, 2016 | Apr. 30, 2017 | Apr. 30, 2016
Net sales |  |  |  |
Total net sales | $ 887.4 | $ 839.6 | $ 1,708.3 | $ 1,611.0
United States |  |  |  |
Net sales |  |  |  |
Total net sales | 434.5 | 406.3 | 842.5 | 778.7
Europe, Middle East and Africa |  |  |  |
Net sales |  |  |  |
Total net sales | 325.5 | 310.8 | 611.4 | 587.0
Asia Pacific and other Americas |  |  |  |
Net sales |  |  |  |
Total net sales | $ 127.4 | $ 122.5 | $ 254.4 | $ 245.3

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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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