v2.4.1.9

Debt Long Term Debt (Details) (USD $)	3 Months Ended	12 Months Ended
	Jan. 31, 2015	Oct. 31, 2014
Debt Instrument [Line Items]
Long Term Debt Fair Value Over Carrying Value	$ 24,000,000keys_LongTermDebtFairValueOverCarryingValue	$ 1,000,000keys_LongTermDebtFairValueOverCarryingValue
Senior Notes 2019 [Member]
Debt Instrument [Line Items]
Unsecured Long-term Debt, Noncurrent	499us-gaap_UnsecuredLongTermDebt / us-gaap_LongtermDebtTypeAxis = keys_SeniorNotes2019Member	499us-gaap_UnsecuredLongTermDebt / us-gaap_LongtermDebtTypeAxis = keys_SeniorNotes2019Member
Senior Notes 2024 [Member]
Debt Instrument [Line Items]
Unsecured Long-term Debt, Noncurrent	600us-gaap_UnsecuredLongTermDebt / us-gaap_LongtermDebtTypeAxis = keys_SeniorNotes2024Member	600us-gaap_UnsecuredLongTermDebt / us-gaap_LongtermDebtTypeAxis = keys_SeniorNotes2024Member
Senior Notes [Member]
Debt Instrument [Line Items]
Unsecured Long-term Debt, Noncurrent	$ 1,099us-gaap_UnsecuredLongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember	$ 1,099us-gaap_UnsecuredLongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember

X

- Definition

Long Term Debt Fair Value Over Carrying Value

+ References

No definition available.

+ Details

Name:	keys_LongTermDebtFairValueOverCarryingValue
Namespace Prefix:	keys_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Carrying value as of the balance sheet date of uncollateralized debt obligation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

+ 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



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=keys_SeniorNotes2019Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=keys_SeniorNotes2024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: