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Fair Value Measurements - Additional Information (Details) (USD $) | 3 Months Ended |  |
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Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014 | May 09, 2013
Fair Value Measurements |  |  |  |
Portion of change in fair value included in earnings related to contingent consideration obligations outstanding at period end | $ 151,000 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 | $ (1,222,000)us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 |  |
lkq_Contingent_consideration_amounts_outstanding [Member] |  |  |  |
Fair Value Measurements |  |  |  |
Portion of change in fair value included in earnings related to contingent consideration obligations outstanding at period end | 200,000 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_LongtermDebtTypeAxis = lkq_Lkq_Contingent_consideration_amounts_outstandingMember | 100,000 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_LongtermDebtTypeAxis = lkq_Lkq_Contingent_consideration_amounts_outstandingMember |  |
Credit Agreement |  |  |  |
Fair Value Measurements |  |  |  |
Borrowings under credit agreement, carrying value | 974,000,000 lkq_CreditFacilityBorrowings / us-gaap_LongtermDebtTypeAxis = lkq_CreditAgreementMember |  | 1,100,000,000 lkq_CreditFacilityBorrowings / us-gaap_LongtermDebtTypeAxis = lkq_CreditAgreementMember |
Receivables Securitization Facility |  |  |  |
Fair Value Measurements |  |  |  |
Borrowings under receivable securitization facility, carrying value | 97,000,000 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_LongtermDebtTypeAxis = lkq_ReceivablesSecuritizationMember |  | 94,900,000 us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount / us-gaap_LongtermDebtTypeAxis = lkq_ReceivablesSecuritizationMember |
Senior Notes |  |  |  |
Fair Value Measurements |  |  |  |
Debt instrument, fair value | 593,000,000 us-gaap_LongTermDebtFairValue / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  | 569,000,000 us-gaap_LongTermDebtFairValue / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Debt instrument, carrying value | $ 600,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |  | $ 600,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember | $ 600,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember

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- Definition Total outstanding balance for the credit facility borrowings, including term loan borrowings and line of credit borrowings as of the balance sheet date. + References No definition available. + Details
Name: | lkq_CreditFacilityBorrowings
Namespace Prefix: | lkq_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
Name: | us-gaap_LongTermDebtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Carrying amount of liabilities associated with financial assets accounted for as secured borrowings recognized in the transferor's statement of financial position at the end of each period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=55761124&loc=SL6224234-111729 + Details
Name: | us-gaap_TransfersAccountedForAsSecuredBorrowingsAssociatedLiabilitiesCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=lkq_CreditAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=lkq_Lkq_Contingent_consideration_amounts_outstandingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=lkq_ReceivablesSecuritizationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |