REVENUE- Revenue by Region (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2024	Jul. 31, 2023
Net revenue	$ 1,578	$ 1,672	$ 4,809	$ 5,145
Life Sciences and Applied Markets
Net revenue	782	854	2,382	2,671
Agilent CrossLab
Net revenue	411	396	1,218	1,164
Diagnostics and Genomics
Net revenue	385	422	1,209	1,310
Americas
Net revenue	626	667	1,893	2,030
Americas | Life Sciences and Applied Markets
Net revenue	251	270	735	819
Americas | Agilent CrossLab
Net revenue	170	159	501	467
Americas | Diagnostics and Genomics
Net revenue	205	238	657	744
Europe
Net revenue	432	432	1,316	1,321
Europe | Life Sciences and Applied Markets
Net revenue	193	203	605	649
Europe | Agilent CrossLab
Net revenue	113	108	335	309
Europe | Diagnostics and Genomics
Net revenue	126	121	376	363
Asia Pacific
Net revenue	520	573	1,600	1,794
Asia Pacific | Life Sciences and Applied Markets
Net revenue	338	381	1,042	1,203
Asia Pacific | Agilent CrossLab
Net revenue	128	129	382	388
Asia Pacific | Diagnostics and Genomics
Net revenue	$ 54	$ 63	$ 176	$ 203