INCOME TAXES INCOME TAXES (Tax incentives) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	9 Months Ended
Jul. 31, 2019	Jul. 31, 2019
Income Tax Disclosure [Abstract]
Tax incentives, Description		Keysight benefits from tax incentives in several jurisdictions, most significantly in Singapore, that have granted us tax incentives that require renewal 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 or specific types of income in those jurisdictions.
Tax incentives, Termination Date		The Singapore tax incentive is due for renewal in fiscal 2024.
Decrease in income tax provision due to tax incentives, Aggregate Dollar Amount	$ 13	$ 32
Decrease in income tax provision due to tax incentives, Income Tax Benefits Per Share	$ 0.07	$ 0.17

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- Definition

The amount of income taxes from which a reporting entity is exempt or for which it will receive a reduction in income taxes as a result of the income tax holiday granted by the taxing jurisdiction.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
-URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330215-122817

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A description of the factual circumstances giving rise to an income tax exemption or special reduction received from a taxing jurisdiction.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 25
-Paragraph 35
-URI http://asc.fasb.org/extlink&oid=115928272&loc=d3e28937-109314

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
-URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330215-122817

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Per share amount effect of the income tax benefit resulting from the income tax holidays granted by taxing jurisdictions.

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The date on which the special tax status will terminate.

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