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Document and Entity Information - shares	6 Months Ended
	Apr. 30, 2019	May 29, 2019
Document and Entity Information [Abstract]
Entity Registrant Name	KEYSIGHT TECHNOLOGIES, INC.
Entity Central Index Key	0001601046
Current Fiscal Year End Date	--10-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		188,170,970
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Apr. 30, 2019
Trading Symbol	KEYS
Entity Emerging Growth Company	false
Entity Small Business	false

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