REVENUE- Revenue by Region (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Net revenue	$ 1,357	$ 1,284
Life Sciences and Applied Markets
Net revenue	638	607
Diagnostics and Genomics
Net revenue	249	235
Agilent CrossLab
Net revenue	470	442
Americas
Net revenue	494	433
Americas | Life Sciences and Applied Markets
Net revenue	209	168
Americas | Diagnostics and Genomics
Net revenue	118	109
Americas | Agilent CrossLab
Net revenue	167	156
Europe
Net revenue	392	383
Europe | Life Sciences and Applied Markets
Net revenue	167	164
Europe | Diagnostics and Genomics
Net revenue	92	91
Europe | Agilent CrossLab
Net revenue	133	128
Asia Pacific
Net revenue	471	468
Asia Pacific | Life Sciences and Applied Markets
Net revenue	262	275
Asia Pacific | Diagnostics and Genomics
Net revenue	39	35
Asia Pacific | Agilent CrossLab
Net revenue	$ 170	$ 158