SEGMENT INFORMATION - Profitability (Details) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2024 USD ($)	Jul. 31, 2023 USD ($)	Jul. 31, 2024 USD ($)	Jul. 31, 2023 USD ($)
Segment Reporting Information
Number of operating segments	3	3	3	3
Segment Reporting Information
Net revenue	$ 1,578	$ 1,672	$ 4,809	$ 5,145
Income from operations	333	133	1,080	942
Operating Segments
Segment Reporting Information
Income from operations	432	490	1,255	1,406
Life Sciences and Applied Markets
Segment Reporting Information
Net revenue	782	854	2,382	2,671
Life Sciences and Applied Markets | Operating Segments
Segment Reporting Information
Income from operations	222	265	644	809
Diagnostics and Genomics
Segment Reporting Information
Net revenue	385	422	1,209	1,310
Diagnostics and Genomics | Operating Segments
Segment Reporting Information
Income from operations	70	96	226	262
Agilent CrossLab
Segment Reporting Information
Net revenue	411	396	1,218	1,164
Agilent CrossLab | Operating Segments
Segment Reporting Information
Income from operations	$ 140	$ 129	$ 385	$ 335