Document and Entity Information - shares	6 Months Ended
	Apr. 30, 2021	May 21, 2021
Document and Entity Information [Abstract]
Entity Registrant Name	AGILENT TECHNOLOGIES, INC.
Document Type	10-Q
Document Fiscal Period Focus	Q2
Document Period End Date	Apr. 30, 2021
Current Fiscal Year End Date	--10-31
Document Fiscal Year Focus	2021
Amendment Flag	false
Document Quarterly Report	true
Document Transition Report	false
Entity Central Index Key	0001090872
Entity File Number	001-15405
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0518772
Entity Address, Address Line One	5301 Stevens Creek Blvd.,
Entity Address, City or Town	Santa Clara,
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95051
City Area Code	(800)
Local Phone Number	227-9770
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	A
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		303,443,225