Name:	jbht_EBPAssetHeldForInvestmentParticipantLoanLoanTerm
Namespace Prefix:	jbht_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The maximum number of loans a participant may have in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

No definition available.

Name:	jbht_EBPAssetHeldForInvestmentParticipantLoanMaximumNumberOfLoansPerParticipant
Namespace Prefix:	jbht_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Variable rate on participant loan in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

No definition available.

Name:	jbht_EBPAssetHeldForInvestmentParticipantLoanVariableRate
Namespace Prefix:	jbht_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

The minimum hours of service a participant must complete within a year to receive vesting service credit.

No definition available.

Name:	jbht_EBPMinimumHoursOfServiceWithinAYearRequiredForParticipantsToReceiveVestingServiceCredit
Namespace Prefix:	jbht_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The minimum vesting period in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

No definition available.

Name:	jbht_EBPMinimumVestingPeriod
Namespace Prefix:	jbht_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The percent vesting over the fifth year.

No definition available.

Name:	jbht_EBPVestingPercentageOverFifthYear
Namespace Prefix:	jbht_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

The percent vesting over the first year.

No definition available.

Name:	jbht_EBPVestingPercentageOverFirstYear
Namespace Prefix:	jbht_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

The percent vesting over the fourth year.

No definition available.

Name:	jbht_EBPVestingPercentageOverFourthYear
Namespace Prefix:	jbht_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

The percent vesting over the second year.

No definition available.

Name:	jbht_EBPVestingPercentageOverSecondYear
Namespace Prefix:	jbht_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

The percent vesting over the sixth year.

No definition available.

Name:	jbht_EBPVestingPercentageOverSixthYear
Namespace Prefix:	jbht_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

The percent vesting over the third year.

No definition available.

Name:	jbht_EBPVestingPercentageOverThirdYear
Namespace Prefix:	jbht_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Amount of decrease in forfeited nonvested account of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

No definition available.

Name:	jbht_EmployeeBenefitPlanForfeitedNonvestedAccountDecrease
Namespace Prefix:	jbht_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The minimum age a participant must be to make make-up contributions to the employee benefit plan.

No definition available.

Name:	jbht_EmployeeBenefitPlanMinimumAgeOfParticipantRequiredToMakeMakeupContribution
Namespace Prefix:	jbht_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Percentage of employer matching contribution on eligible participant contribution to employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

Name:	us-gaap-ebp_EmployeeBenefitPlanEmployerContributionMatchingPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Percentage of participant compensation eligible for employer matching contribution for participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

Name:	us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Amount of plan asset, in forfeited nonvested account, no longer allocated to participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

Name:	us-gaap-ebp_EmployeeBenefitPlanForfeitedNonvestedAccount
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of decrease in forfeited nonvested account of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) from employer contribution.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (j)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-04(5)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Name:	us-gaap-ebp_EmployeeBenefitPlanForfeitedNonvestedAccountDecreaseForEmployerContribution
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

Name:	us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Percentage of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow to total participant account balance.

Name:	us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Amount of minimum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

Name:	us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMinimumBorrowingAmount
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Percentage of eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

Name:	us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Interest rate on participant loan in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (1)(i)(D)
-Publisher DOL-EBSA

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule I))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Name:	us-gaap-ebp_EmployeeBenefitPlanParticipantLoanInterestRate
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Name:	dei_LegalEntityAxis=jbht_EBP710335111001Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_InvestmentTypeAxis=jbht_LoanForPrimaryResidenceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_InvestmentTypeAxis=jbht_GeneralLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: