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SEGMENT INFORMATION Profitability (Details) $ in Millions | 12 Months Ended
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Oct. 31, 2019 USD ($) segment | Oct. 31, 2018 USD ($) | Oct. 31, 2017 USD ($)
Segment Reporting [Abstract] |  |  |
Number of operating segments | segment | 3 |  |
Percentage of revenue from a single customer | Less than 10 percent | Less than 10 percent | Less than 10 percent
Select income statement components |  |  |
Net revenue | $ 5,163 | $ 4,914 | $ 4,472
Income from operations | 941 | 904 | 807
Depreciation expense | 111 | 102 | 94
Share-based compensation | 72 | 70 | 60
Life Sciences and Applied Markets |  |  |
Select income statement components |  |  |
Net revenue | 2,302 | 2,270 | 2,081
Income from operations | 542 | 543 | 470
Depreciation expense | 41 | 38 | 35
Share-based compensation | 33 | 33 | 30
Diagnostics and Genomics |  |  |
Select income statement components |  |  |
Net revenue | 1,021 | 943 | 860
Income from operations | 185 | 173 | 167
Depreciation expense | 35 | 33 | 30
Share-based compensation | 14 | 14 | 10
Agilent CrossLab |  |  |
Select income statement components |  |  |
Net revenue | 1,840 | 1,701 | 1,531
Income from operations | 475 | 388 | 336
Depreciation expense | 35 | 31 | 29
Share-based compensation | 25 | 24 | 21
Segment Total [Member] |  |  |
Select income statement components |  |  |
Net revenue | 5,163 | 4,914 | 4,472
Income from operations | 1,202 | 1,104 | 973
Depreciation expense | 111 | 102 | 94
Share-based compensation | $ 72 | $ 71 | $ 61

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- Definition Description of risks that arise due to the volume of business transacted with a particular customer. At a minimum, the description informs financial statement users of the general nature of the risk, but excludes "Information about Major Customers" that may be disclosed elsewhere (for instance, segment disclosures). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6327-108592 + Details
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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References No definition available. + Details
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