SEGMENT INFORMATION - Segment Assets (Details) - USD ($) $ in Millions	Jan. 31, 2018	Oct. 31, 2017
Segment Reporting Information
Assets	$ 8,698	$ 8,426
Life Sciences and Applied Markets
Segment Reporting Information
Assets	1,804	1,753
Diagnostics and Genomics
Segment Reporting Information
Assets	2,130	2,119
Agilent CrossLab
Segment Reporting Information
Assets	1,181	1,138
Segment Total
Segment Reporting Information
Assets	$ 5,115	$ 5,010