XML 20 R8.htm IDEA: XBRL DOCUMENT v3.25.0.1

Statements of Cash Flows (Parenthetical) $ in Millions	12 Months Ended
	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

X

- References

No definition available.

+ Details

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