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SEGMENT INFORMATION - Profitability (Details) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2025 USD ($)	Apr. 30, 2024 USD ($)	Apr. 30, 2025 USD ($)	Apr. 30, 2024 USD ($)
Segment Reporting Information
Number of operating segments	3	3	3	3
Segment Reporting Information
Net revenue	$ 1,668	$ 1,573	$ 3,349	$ 3,231
Income from operations	300	363	676	747
Operating Segments
Segment Reporting Information
Income from operations	419	395	841	823
Life Sciences and Diagnostics Markets
Segment Reporting Information
Net revenue	654	604	1,301	1,224
Life Sciences and Diagnostics Markets | Operating Segments
Segment Reporting Information
Income from operations	129	115	246	229
Agilent CrossLab
Segment Reporting Information
Net revenue	713	664	1,409	1,350
Agilent CrossLab | Operating Segments
Segment Reporting Information
Income from operations	231	216	452	438
Applied Markets
Segment Reporting Information
Net revenue	301	305	639	657
Applied Markets | Operating Segments
Segment Reporting Information
Income from operations	$ 59	$ 64	$ 143	$ 156

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