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VARIABLE INTEREST ENTITIES (Narrative) (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2022 USD ($) entity
Variable Interest Entities |
Number of unconsolidated tax credit fund entities that were considered to be Variable Interest Entities | entity | 4
Equity method investment in VIEs, net | $ | $ 24.1

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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
Name: | orly_NumberOfUnconsolidatedTaxCreditFundEntitiesThatWereConsideredToBeVariableInterestEntities
Namespace Prefix: | orly_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition No definition available + References No definition available. + Details
Name: | orly_VariableInterestEntitiesAbstract
Namespace Prefix: | orly_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The carrying amount of the reporting entity's equity method investment in a Variable Interest Entity included in the reporting entity's statement of financial position. + References No definition available. + Details
Name: | orly_VariableInterestEntityEquityMethodInvestmentCarryAmount
Namespace Prefix: | orly_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant