REVENUE - Revenue by Region (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2022
Disaggregation of Revenue [Line Items]
Net revenue	$ 6,510	$ 6,833	$ 6,848
Americas
Disaggregation of Revenue [Line Items]
Net revenue	2,573	2,732	2,682
Europe
Disaggregation of Revenue [Line Items]
Net revenue	1,770	1,754	1,699
Asia Pacific
Disaggregation of Revenue [Line Items]
Net revenue	2,167	2,347	2,467
Life Sciences and Applied Markets
Disaggregation of Revenue [Line Items]
Net revenue	3,215	3,510	3,630
Life Sciences and Applied Markets | Americas
Disaggregation of Revenue [Line Items]
Net revenue	995	1,099	1,109
Life Sciences and Applied Markets | Europe
Disaggregation of Revenue [Line Items]
Net revenue	811	851	844
Life Sciences and Applied Markets | Asia Pacific
Disaggregation of Revenue [Line Items]
Net revenue	1,409	1,560	1,677
Diagnostics and Genomics
Disaggregation of Revenue [Line Items]
Net revenue	1,651	1,755	1,766
Diagnostics and Genomics | Americas
Disaggregation of Revenue [Line Items]
Net revenue	904	999	1,006
Diagnostics and Genomics | Europe
Disaggregation of Revenue [Line Items]
Net revenue	507	486	473
Diagnostics and Genomics | Asia Pacific
Disaggregation of Revenue [Line Items]
Net revenue	240	270	287
Agilent CrossLab
Disaggregation of Revenue [Line Items]
Net revenue	1,644	1,568	1,452
Agilent CrossLab | Americas
Disaggregation of Revenue [Line Items]
Net revenue	674	634	567
Agilent CrossLab | Europe
Disaggregation of Revenue [Line Items]
Net revenue	452	417	382
Agilent CrossLab | Asia Pacific
Disaggregation of Revenue [Line Items]
Net revenue	$ 518	$ 517	$ 503