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Revenue - Revenue by end Markets and by type (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2019 | Apr. 30, 2018 | Apr. 30, 2019 | Apr. 30, 2018
Net revenue | $ 1,238 | $ 1,206 | $ 2,522 | $ 2,417
Instrumentation |  |  |  |
Net revenue | 491 |  | 1,058 |
Non-Instrumentation and Other |  |  |  |
Net revenue | 747 |  | 1,464 |
Pharmaceutical and Biotechnology Market |  |  |  |
Net revenue | 371 |  | 762 |
Chemical and Energy Market |  |  |  |
Net revenue | 300 |  | 608 |
Diagnostics and Clinical Market |  |  |  |
Net revenue | 193 |  | 380 |
Food Market |  |  |  |
Net revenue | 114 |  | 243 |
Academia and Government Market |  |  |  |
Net revenue | 114 |  | 230 |
Environmental and Forensics Market |  |  |  |
Net revenue | $ 146 |  | $ 299 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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