Open Tax Year Date

No definition available.

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- Definition

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.

+ References

No definition available.

+ Details

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- Definition

Tax year that remains open to examination under enacted tax laws, in CCYY format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319

+ Details

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Period Type:	duration

- Definition

Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 25
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121573983&loc=d3e28511-109314

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 25
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=121573983&loc=d3e28446-109314

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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- Details

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- Details

Name:	dei_LegalEntityAxis=keys_ForeignentitiesMember
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INCOME TAXES Income tax contingencies (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2020
Income Tax Contingency [Line Items]
Income taxes and penalties on gains related to IP rights	$ 68
Internal Revenue Service (IRS) [Member]
Income Tax Contingency [Line Items]
Open Tax Year Date		Nov. 01, 2015
Foreign Tax Authority
Income Tax Contingency [Line Items]
Open Tax Year Date		Nov. 01, 2015
Foreign entities [Member]
Income Tax Contingency [Line Items]
Open Tax Year		2008