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DEBT Long Term Debt (Details) - USD ($) $ in Millions	1 Months Ended	9 Months Ended	12 Months Ended
	May 31, 2016	Jul. 31, 2016	Oct. 31, 2015
Debt Instrument [Line Items]
Unsecured Long-term Debt, Noncurrent		$ 1,100	$ 1,099
Long Term Debt Fair Value below (above) carrying Value		(36)	8
3.30% Senior Notes due 2019
Debt Instrument [Line Items]
Unsecured Long-term Debt, Noncurrent		500	499
4.55% Senior Notes due 2024
Debt Instrument [Line Items]
Unsecured Long-term Debt, Noncurrent		$ 600	$ 600
Other Debt Obligations [Member]
Debt Instrument [Line Items]
Repayment of debt	$ 1

X

- Definition

Long Term Debt Fair Value Over Carrying Value

+ References

No definition available.

+ Details

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Namespace Prefix:	keys_
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Balance Type:	credit
Period Type:	duration

X

- 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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X

- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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X

- Details

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X

- Details

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X

- Details

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