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REVENUE - Revenue by End Markets (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Jan. 31, 2020 | Jan. 31, 2019
Net revenue | $ 1,357 | $ 1,284
Pharmaceutical and Biopharmaceutical Market |  |
Net revenue | 423 | 391
Chemical and Energy Market |  |
Net revenue | 312 | 308
Diagnostics and Clinical Market |  |
Net revenue | 194 | 187
Food Market |  |
Net revenue | 130 | 129
Academia and Government Market |  |
Net revenue | 141 | 116
Environmental and Forensics Market |  |
Net revenue | $ 157 | $ 153

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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