SEGMENT INFORMATION - Profitability (Details) $ in Millions	3 Months Ended
	Jan. 31, 2022 USD ($)	Jan. 31, 2021 USD ($)
Segment Reporting Information
Number of operating segments	3
Segment Reporting Information
Net revenue	$ 1,674	$ 1,548
Income from operations	376	328
Life Sciences and Applied Markets
Segment Reporting Information
Net revenue	976	923
Income from operations	282	265
Diagnostics and Genomics
Segment Reporting Information
Net revenue	339	294
Income from operations	68	55
Agilent CrossLab
Segment Reporting Information
Net revenue	359	331
Income from operations	91	76
Segment Total
Segment Reporting Information
Net revenue	1,674	1,548
Income from operations	$ 441	$ 396