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Significant Unobservable Inputs Used in Fair Value Measurements (Details) (Contingent consideration liabilities, Fair Value, Inputs, Level 3)
Mar. 31, 2015
Dec. 31, 2014
Contingent consideration liabilities | Fair Value, Inputs, Level 3
    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation    
Weighted Average, Probability of achieving payout targets 75.00%lkq_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityWeightedAverageProbabilityPayoutTargets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= lkq_ContingentConsiderationLiabilitiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		 79.10%lkq_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityWeightedAverageProbabilityPayoutTargets
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= lkq_ContingentConsiderationLiabilitiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
Weighted Average, Discount rate 7.50%lkq_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityWeightedAverageDiscountRate
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= lkq_ContingentConsiderationLiabilitiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member		 7.50%lkq_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityWeightedAverageDiscountRate
/ us-gaap_EligibleItemOrGroupForFairValueOptionAxis
= lkq_ContingentConsiderationLiabilitiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member