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SEGMENT INFORMATION - Profitability (Details) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2025 USD ($)	Jul. 31, 2024 USD ($)	Jul. 31, 2025 USD ($)	Jul. 31, 2024 USD ($)
Segment Reporting Information
Number of operating segments	3	3	3	3
Segment Reporting Information
Net revenue	$ 1,738	$ 1,578	$ 5,087	$ 4,809
Income from operations	360	333	1,036	1,080
Operating Segments
Segment Reporting Information
Income from operations	437	432	1,278	1,255
Life Sciences and Diagnostics Markets
Segment Reporting Information
Net revenue	670	585	1,971	1,809
Life Sciences and Diagnostics Markets | Operating Segments
Segment Reporting Information
Income from operations	118	114	364	343
Agilent CrossLab
Segment Reporting Information
Net revenue	744	691	2,153	2,041
Agilent CrossLab | Operating Segments
Segment Reporting Information
Income from operations	248	248	700	686
Applied Markets
Segment Reporting Information
Net revenue	324	302	963	959
Applied Markets | Operating Segments
Segment Reporting Information
Income from operations	$ 71	$ 70	$ 214	$ 226

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