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INCOME TAXES INCOME TAXES (Tax incentives) (Details) - USD ($)
$ in Millions
3 Months Ended
Jan. 31, 2024
Jan. 31, 2023
Income Tax Disclosure [Abstract]    
Tax incentives, Description Keysight benefits from tax incentives in several jurisdictions, most significantly in Singapore and Malaysia, that will expire at various times in the future. The tax incentives provide lower rates of taxation on certain classes of income and require thresholds of investments and employment in those jurisdictions.  
Decrease in income tax provision due to tax incentives, Aggregate Dollar Amount $ 13 $ 25