v2.4.1.9

OVERVIEW, BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Oct. 31, 2014
Accounting Policies [Abstract]
One time separation costs	$ 7keys_Onetimeandpreseparationcosts	$ 8keys_Onetimeandpreseparationcosts
Fair Value of Financial Instruments
Long Term Debt Fair Value Over Carrying Value	$ 24keys_LongTermDebtFairValueOverCarryingValue		$ 1keys_LongTermDebtFairValueOverCarryingValue

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

- Definition

One time and pre separation costs

+ References

No definition available.

+ Details

Name:	keys_Onetimeandpreseparationcosts
Namespace Prefix:	keys_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

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

X

- Details

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