SEGMENT INFORMATION - Segment Assets (Details) - USD ($) $ in Millions	Apr. 30, 2021	Oct. 31, 2020
Segment Reporting Information
Assets	$ 10,398	$ 9,627
Life Sciences and Applied Markets
Segment Reporting Information
Assets	3,119	3,143
Diagnostics and Genomics
Segment Reporting Information
Assets	3,262	2,515
Agilent CrossLab
Segment Reporting Information
Assets	1,425	1,375
Segment Total
Segment Reporting Information
Assets	$ 7,806	$ 7,033