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Statements of Cash Flows (Parenthetical) $ in Millions | 12 Months Ended
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Dec. 31, 2024 USD ($)
Statement of Cash Flows [Abstract] |
Payments for purchased federal tax credits | $ 177.5

X
- Definition Payments for purchased federal tax credits. + References No definition available. + Details
Name: | odfl_PaymentsForPurchasedFederalTaxCredits
Namespace Prefix: | odfl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_StatementOfCashFlowsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration