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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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No definition available.

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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

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