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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
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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

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- Definition The weighted average Interest rate used to find the present value of an amount to be paid in the future as an input to measure fair value. + References No definition available. + Details
Name: | lkq_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityWeightedAverageDiscountRate
Namespace Prefix: | lkq_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition The weighted average measure of the probability of achieving the payout target specified in the contingent consideration agreement, which is used as an input to measure fair value. + References No definition available. + Details
Name: | lkq_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityWeightedAverageProbabilityPayoutTargets
Namespace Prefix: | lkq_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration