XML 150 R1.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Document And Entity Information - USD ($)
$ in Billions
 12 Months Ended
Oct. 31, 2019
Dec. 16, 2019
Apr. 30, 2019
Cover page.      
Document Annual Report true    
Title of 12(b) Security Common Stockpar value $0.01 per share    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 46-4254555    
Entity Registrant Name Keysight Technologies, Inc.    
Entity Central Index Key 0001601046    
Current Fiscal Year End Date --10-31    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 11
Entity Common Stock, Shares Outstanding   188,447,566  
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Document Type 10-K    
Amendment Flag false    
Document Period End Date Oct. 31, 2019    
Document Transition Report false    
Trading Symbol KEYS    
Entity Emerging Growth Company false    
Entity Small Business false    
Entity Shell Company false    
Entity File Number 001-36334    
Entity Address, Address Line One 1400 Fountaingrove Parkway    
Entity Address, City or Town Santa Rosa    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 95403    
City Area Code (800)    
Local Phone Number 829-4444    
Security Exchange Name NYSE    
Entity Interactive Data Current Yes