Name:	orly_DebtInstrumentCallFeatureEarliestNumberOfDaysCallable
Namespace Prefix:	orly_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

As described in the Indenture governing the notes, the maximum number of days notice the Company must give to call the notes.

No definition available.

Name:	orly_DebtInstrumentCallFeatureLatestNumberOfDaysCallable
Namespace Prefix:	orly_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

The percentage of the principal amount of the debt instrument that can be redeemed upon a change in control triggering event.

No definition available.

Name:	orly_PercentOfDebtInstrumentPrincipalAmountRedeemableUponChangeInControl
Namespace Prefix:	orly_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

The percentage of the principal amount of the debt instrument that can be redeemed at the option of the Company.

No definition available.

Name:	orly_PercentOfDebtInstrumentPrincipalAmountRedeemed
Namespace Prefix:	orly_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_OtherCommitmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Minimum amount to be expended to satisfy the terms of arrangements in which the entity has agreed to expend funds to procure goods or services, excluding long-term purchase commitments or unconditional purchase obligations.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(17))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(25))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Name:	us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of unrecorded obligation to transfer funds in future for fixed or minimum amount or quantity of product and service at fixed or minimum price. Includes, but is not limited to, lease not yet commenced and take-or-pay and throughput contracts.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 440
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482648/440-10-50-4

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-3