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SEGMENT INFORMATION Profitability (Details) $ in Millions	12 Months Ended
	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).

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