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VARIABLE INTEREST ENTITIES (Narrative) (Details) $ in Millions | 9 Months Ended
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Sep. 30, 2024 USD ($) entity
Variable Interest Entities |
Number of unconsolidated tax credit fund entities that were considered to be Variable Interest Entities | entity | 6
Equity method investment in VIEs, net | $ | $ 28.4

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- Definition Number of unconsolidated tax credit fund entities that were considered to be Variable Interest Entities + References No definition available. + Details
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Namespace Prefix: | orly_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481203/810-10-50-6 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481203/810-10-50-4 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration