Document and Entity Information - shares
6 Months Ended
Apr. 30, 2017
Jun. 05, 2017
Entity Information [Line Items]    
Entity Registrant Name Keysight Technologies, Inc.  
Entity Central Index Key 0001601046  
Current Fiscal Year End Date --10-31  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   185,367,946
Document Fiscal Year Focus 2017  
Document Fiscal Period Focus Q2  
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Apr. 30, 2017  
Trading Symbol KEYS