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SHARE-BASED COMPENSATION AND BENEFIT PLANS (Benefit Plans) (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Profit sharing and savings plan [Member] | Nonqualified deferred compensation plan [Member] |  |  |  |
Share-Based Compensation and Benefit Plans |  |  |  |
Benefit plans, cost recognized | $ 14.3 | $ 12.8 | $ 28.3 | $ 26.7

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- Definition Amount of expense for the employer contribution to the profit sharing and savings plan and nonqualified deferred compensation plan. + References No definition available. + Details
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Namespace Prefix: | orly_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480794/715-70-50-1 + Details
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Namespace Prefix: | us-gaap_
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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