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Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted (Tables) | 6 Months Ended
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Jun. 30, 2020
Schedule of Earnings Per Share, Basic and Diluted [Line Items] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following chart sets forth the computation of earnings per share (in thousands, except per share amounts):
| Three Months Ended |  |  |  | Six Months Ended |  |
| June 30, |  |  |  | June 30, |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
Income from continuing operations | $ | 118,493 |  |  | $ | 151,707 |  |  | $ | 265,387 |  |  | $ | 250,770 |
Denominator for basic earnings per share—Weighted-average shares outstanding | 304,001 |  |  | 311,891 |  |  | 305,123 |  |  | 313,460 |
Effect of dilutive securities: |  |  |  |  |  |  |
RSUs | 189 |  |  | 315 |  |  | 352 |  |  | 364 |
PSUs | — |  |  | — |  |  | — |  |  | — |
Stock options | — |  |  | 513 |  |  | 2 |  |  | 536 |
Denominator for diluted earnings per share—Adjusted weighted-average shares outstanding | 304,190 |  |  | 312,719 |  |  | 305,477 |  |  | 314,360 |
Basic earnings per share from continuing operations | $ | 0.39 |  |  | $ | 0.49 |  |  | $ | 0.87 |  |  | $ | 0.80 |
Diluted earnings per share from continuing operations (1) | $ | 0.39 |  |  | $ | 0.49 |  |  | $ | 0.87 |  |  | $ | 0.80 |

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- Definition [Line Items] for Schedule of Earnings Per Share, Basic and Diluted [Table] - Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References No definition available. + Details
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Namespace Prefix: | lkq_
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
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Period Type: | duration