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SEGMENT INFORMATION Profitability (Details) $ in Millions	12 Months Ended
	Oct. 31, 2021 USD ($) segment numberOfCustomers	Oct. 31, 2020 USD ($) numberOfCustomers	Oct. 31, 2019 USD ($) numberOfCustomers
Segment Reporting [Abstract]
Number of operating segments | segment	3
Select income statement components
Net revenue	$ 6,319	$ 5,339	$ 5,163
Income from operations	1,347	846	941
Depreciation expense	122	119	111
Share-based compensation	$ 110	$ 83	$ 72
Number of customers representing 10 percent or more of total net revenue | numberOfCustomers	0	0	0
Life Sciences and Applied Markets
Select income statement components
Net revenue	$ 2,823	$ 2,392	$ 2,302
Income from operations	722	548	542
Depreciation expense	44	43	41
Share-based compensation	45	35	33
Diagnostics and Genomics
Select income statement components
Net revenue	1,296	1,047	1,021
Income from operations	273	192	185
Depreciation expense	39	39	35
Share-based compensation	22	17	14
Agilent CrossLab
Select income statement components
Net revenue	2,200	1,900	1,840
Income from operations	618	516	475
Depreciation expense	39	37	35
Share-based compensation	39	29	25
Segment Total
Select income statement components
Net revenue	6,319	5,339	5,163
Income from operations	1,613	1,256	1,202
Depreciation expense	122	119	111
Share-based compensation	$ 106	$ 81	$ 72

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