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SEGMENT INFORMATION - Profitability (Details) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2018 USD ($)	Apr. 30, 2017 USD ($)	Apr. 30, 2018 USD ($)	Apr. 30, 2017 USD ($)
Segment Reporting Information
Number of operating segments	3
Segment Reporting Information
Net revenue	$ 1,206	$ 1,102	$ 2,417	$ 2,169
Income from operations	215	201	454	407
Life Sciences and Applied Markets
Segment Reporting Information
Net revenue	561	523	1,179	1,063
Income from operations	119	110	278	236
Diagnostics and Genomics
Segment Reporting Information
Net revenue	219	201	404	365
Income from operations	44	49	66	72
Agilent CrossLab
Segment Reporting Information
Net revenue	426	378	834	741
Income from operations	98	82	186	156
Segment Total
Segment Reporting Information
Net revenue	1,206	1,102	2,417	2,169
Income from operations	$ 261	$ 241	$ 530	$ 464

X

- 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.

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The net result for the period of deducting operating expenses from operating revenues.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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