SEGMENT INFORMATION - Profitability (Details) $ in Millions	3 Months Ended
	Jan. 31, 2018 USD ($)	Jan. 31, 2017 USD ($)
Segment Reporting Information
Number of operating segments	3
Segment Reporting Information
Net revenue	$ 1,211	$ 1,067
Income from operations	239	206
Life Sciences and Applied Markets
Segment Reporting Information
Net revenue	618	540
Income from operations	159	126
Diagnostics and Genomics
Segment Reporting Information
Net revenue	185	164
Income from operations	22	23
Agilent CrossLab
Segment Reporting Information
Net revenue	408	363
Income from operations	88	74
Segment Total
Segment Reporting Information
Net revenue	1,211	1,067
Income from operations	$ 269	$ 223