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SEGMENT INFORMATION Profitability (Details) $ in Millions | 12 Months Ended
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Oct. 31, 2021 USD ($) segment numberOfCustomers | Oct. 31, 2020 USD ($) numberOfCustomers | Oct. 31, 2019 USD ($) numberOfCustomers
Segment Reporting [Abstract] |  |  |
Number of operating segments | segment | 3 |  |
Select income statement components |  |  |
Net revenue | $ 6,319 | $ 5,339 | $ 5,163
Income from operations | 1,347 | 846 | 941
Depreciation expense | 122 | 119 | 111
Share-based compensation | $ 110 | $ 83 | $ 72
Number of customers representing 10 percent or more of total net revenue | numberOfCustomers | 0 | 0 | 0
Life Sciences and Applied Markets |  |  |
Select income statement components |  |  |
Net revenue | $ 2,823 | $ 2,392 | $ 2,302
Income from operations | 722 | 548 | 542
Depreciation expense | 44 | 43 | 41
Share-based compensation | 45 | 35 | 33
Diagnostics and Genomics |  |  |
Select income statement components |  |  |
Net revenue | 1,296 | 1,047 | 1,021
Income from operations | 273 | 192 | 185
Depreciation expense | 39 | 39 | 35
Share-based compensation | 22 | 17 | 14
Agilent CrossLab |  |  |
Select income statement components |  |  |
Net revenue | 2,200 | 1,900 | 1,840
Income from operations | 618 | 516 | 475
Depreciation expense | 39 | 37 | 35
Share-based compensation | 39 | 29 | 25
Segment Total |  |  |
Select income statement components |  |  |
Net revenue | 6,319 | 5,339 | 5,163
Income from operations | 1,613 | 1,256 | 1,202
Depreciation expense | 122 | 119 | 111
Share-based compensation | $ 106 | $ 81 | $ 72

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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 Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8672-108599 + Details
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