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//1943274/2147479853/942-210-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