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REVENUE - Revenue by Region (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2019 | Oct. 31, 2018 | Oct. 31, 2017
Disaggregation of Revenue [Line Items] |  |  |
Net revenue | $ 5,163 | $ 4,914 | $ 4,472
Americas |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net revenue | 1,861 |  |
Europe |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net revenue | 1,441 |  |
Asia Pacific |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net revenue | 1,861 |  |
Life Sciences and Applied Markets |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net revenue | 2,302 | 2,270 | 2,081
Life Sciences and Applied Markets | Americas |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net revenue | 692 |  |
Life Sciences and Applied Markets | Europe |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net revenue | 551 |  |
Life Sciences and Applied Markets | Asia Pacific |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net revenue | 1,059 |  |
Diagnostics and Genomics |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net revenue | 1,021 | 943 | 860
Diagnostics and Genomics | Americas |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net revenue | 505 |  |
Diagnostics and Genomics | Europe |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net revenue | 368 |  |
Diagnostics and Genomics | Asia Pacific |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net revenue | 148 |  |
Agilent CrossLab |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net revenue | 1,840 | $ 1,701 | $ 1,531
Agilent CrossLab | Americas |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net revenue | 664 |  |
Agilent CrossLab | Europe |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net revenue | 522 |  |
Agilent CrossLab | Asia Pacific |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Net revenue | $ 654 |  |

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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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