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REVENUE- Revenue by Region (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024
Net revenue	$ 1,738	$ 1,578	$ 5,087	$ 4,809
Life Sciences and Diagnostics Markets
Net revenue	670	585	1,971	1,809
Agilent CrossLab
Net revenue	744	691	2,153	2,041
Applied Markets
Net revenue	324	302	963	959
Americas
Net revenue	683	626	2,030	1,893
Americas | Life Sciences and Diagnostics Markets
Net revenue	316	268	953	841
Americas | Agilent CrossLab
Net revenue	274	267	805	779
Americas | Applied Markets
Net revenue	93	91	272	273
Europe
Net revenue	492	432	1,397	1,316
Europe | Life Sciences and Diagnostics Markets
Net revenue	201	177	568	537
Europe | Agilent CrossLab
Net revenue	212	184	594	551
Europe | Applied Markets
Net revenue	79	71	235	228
Asia Pacific
Net revenue	563	520	1,660	1,600
Asia Pacific | Life Sciences and Diagnostics Markets
Net revenue	153	140	450	431
Asia Pacific | Agilent CrossLab
Net revenue	258	240	754	711
Asia Pacific | Applied Markets
Net revenue	$ 152	$ 140	$ 456	$ 458

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