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SEGMENT INFORMATION - Profitability (Details) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2022 USD ($)	Apr. 30, 2021 USD ($)	Apr. 30, 2022 USD ($)	Apr. 30, 2021 USD ($)
Segment Reporting Information
Number of operating segments	3
Segment Reporting Information
Net revenue	$ 1,607	$ 1,525	$ 3,281	$ 3,073
Income from operations	360	288	736	616
Life Sciences and Applied Markets
Segment Reporting Information
Net revenue	896	881	1,872	1,804
Income from operations	228	226	510	491
Diagnostics and Genomics
Segment Reporting Information
Net revenue	358	315	697	609
Income from operations	91	69	159	124
Agilent CrossLab
Segment Reporting Information
Net revenue	353	329	712	660
Income from operations	87	69	178	145
Segment Total
Segment Reporting Information
Net revenue	1,607	1,525	3,281	3,073
Income from operations	$ 406	$ 364	$ 847	$ 760

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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.

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