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DERIVATIVE FINANCIAL INSTRUMENTS (Details 2) (USD $)
In Millions, unless otherwise specified
Jan. 31, 2015
Feb. 01, 2014
Derivative Assets    
Cash Collateral $ 0us-gaap_DerivativeCollateralObligationToReturnCash $ 0us-gaap_DerivativeCollateralObligationToReturnCash
Derivative Liabilities    
Cash Collateral 0us-gaap_DerivativeCollateralRightToReclaimCash 0us-gaap_DerivativeCollateralRightToReclaimCash
Cash flow hedges | Forward-starting interest rate swaps    
Derivative Liabilities    
Gross Amount Recognized 39us-gaap_DerivativeFairValueOfDerivativeLiability
/ us-gaap_DerivativeInstrumentRiskAxis
= kr_ForwardStartingInterestRateSwapMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
 
Net Amount Presented in the Balance Sheet 39us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral
/ us-gaap_DerivativeInstrumentRiskAxis
= kr_ForwardStartingInterestRateSwapMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
 
Net Amount 39us-gaap_DerivativeLiabilities
/ us-gaap_DerivativeInstrumentRiskAxis
= kr_ForwardStartingInterestRateSwapMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
 
Fair value hedges | Interest rate swaps    
Derivative Liabilities    
Gross Amount Recognized   2us-gaap_DerivativeFairValueOfDerivativeLiability
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_FairValueHedgingMember
Net Amount Presented in the Balance Sheet   2us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_FairValueHedgingMember
Net Amount   $ 2us-gaap_DerivativeLiabilities
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_FairValueHedgingMember