v2.4.1.9
SHARE-BASED COMPENSATION Fair Value Assumptions (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Jan. 31, 2015
Jan. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation capitalized within inventory $ 2keys_Sharebasedcompensationcapitalizedwithininventory $ 1keys_Sharebasedcompensationcapitalizedwithininventory
ESPP plan purchase price (in hundredths) 85.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate 85.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate
Stock Options [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted average risk-free interest rate (in hundredths) 1.60%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
1.70%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
Dividend yield 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
1.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
Weighted average volatility (in hundredths) 31.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
39.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
Expected life (in years) 4 years 10 months 5 years 10 months
LTPP [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Volatility of Keysight shares (in hundredths) 26.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= keys_LtppMember
0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= keys_LtppMember
Volatility of selected peer-company shares minimum (in hundredths) 17.00%keys_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsPeerCompanySharesVolatilityRateRangeMinimum
/ us-gaap_AwardTypeAxis
= keys_LtppMember
0.00%keys_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsPeerCompanySharesVolatilityRateRangeMinimum
/ us-gaap_AwardTypeAxis
= keys_LtppMember
Volatility of selected peer-company shares maximum (in hundredths) 67.00%keys_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsPeerCompanySharesVolatilityRateRangeMaximum
/ us-gaap_AwardTypeAxis
= keys_LtppMember
0.00%keys_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsPeerCompanySharesVolatilityRateRangeMaximum
/ us-gaap_AwardTypeAxis
= keys_LtppMember
Price-wise correlation with selected peers (in hundredths) 38.00%keys_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsPeerCompanySharesPriceWiseCorrelationyRate
/ us-gaap_AwardTypeAxis
= keys_LtppMember
0.00%keys_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsPeerCompanySharesPriceWiseCorrelationyRate
/ us-gaap_AwardTypeAxis
= keys_LtppMember