SHARE-BASED COMPENSATION (Fair Value Assumptions) (Details) - LTPP [Member]	12 Months Ended
Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility of Keysight shares	32.00%	29.00%	35.00%
Volatility of peer group	31.00%	18.00%	25.00%
Price-wise correlation with peer group	31.00%	69.00%	75.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details