The percent of face value, at which the debt instrument was offered to the public.

No definition available.

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Period Type:	instant

- Definition

The number of days in a year used to calculate interest.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
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- Definition

Number of guarantors under the senior notes

+ References

No definition available.

+ Details

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

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Date the debt instrument was issued, in YYYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
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+ Details

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Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
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Period Type:	duration

- Details

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Balance Type:
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- Details

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- Details

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- Details

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Namespace Prefix:
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- Details

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- Details

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FINANCING (Senior Notes) (Narrative) (Details) $ in Thousands		6 Months Ended
	Jun. 15, 2022 USD ($) D	Jun. 30, 2022 USD ($) D entity	Dec. 31, 2021 USD ($)
Financing
Face amount of senior notes		$ 4,700,000	$ 3,850,000
Senior notes [Member]
Financing
Face amount of senior notes		$ 4,700,000
Number of days in annual interest calculation period \| D		360
Number of guarantors under the senior notes \| entity		0
Minimum [Member] \| Senior notes [Member]
Financing
Interest rate of senior notes		1.75%
Maximum [Member] \| Senior notes [Member]
Financing
Interest rate of senior notes		4.70%
3.800% Senior Notes due 2022 [Member] \| Senior notes [Member]
Financing
Face amount of senior notes		$ 300,000	$ 300,000
Interest rate of senior notes		3.80%	3.80%
3.850% Senior Notes due 2023 [Member] \| Senior notes [Member]
Financing
Face amount of senior notes		$ 300,000	$ 300,000
Interest rate of senior notes		3.85%	3.85%
4.700% Senior Notes due 2032 [Member] \| Senior notes [Member]
Financing
Issuance date of senior notes	Jun. 15, 2022
Face amount of senior notes	$ 850,000	$ 850,000
Interest rate of senior notes	4.70%	4.70%
Percentage of face value of debt instrument	99.684%
Number of days in annual interest calculation period \| D	360