Document And Entity Information Statistical Measurement [Axis] Note To Financial Statement Details Textual Document Fiscal Period Focus EBP, Basis of Accounting [Policy Text Block] EBP, Note Receivable from Participant [Policy Text Block] Significant Accounting Policies Document Fiscal Year Focus Note 3 - Concentration of Investments Note 7 - Fair Value Measurements Net assets available for benefits: ful_PolicyTable Schedule H, line 4i Amendment Flag Note 3 - Concentration of Investments - Schedule of Concentration of Investments (Details) Note 3 - Concentration of Investments - Schedule of Concentration of Investments 2 (Details) Common Stock [Member] Note 7 - Fair Value Measurements - Schedule of Fair Value Measurements (Details) us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentPartyInInterest true Note 7 - Fair Value Measurements - Schedule of Fair Value Measurements 2 (Details) Interest income on notes receivable from participants Minimum [Member] dei_DocumentPeriodEndDate Document Period End Date Statistical Measurement [Domain] us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContribution Total contributions Maximum [Member] Schedule H, line 4i - Schedule of Investments (Details) Other income Transfers into plan from plan merger (Note 1) EBP, Change in Net Asset Available for Benefit, Transfer to (from) Plan Schedule H, line 4i - Schedule of Investments 2 (Details) Notes To Financial Statements Legal Entity [Axis] Notes To Financial Statements [Abstract] EBP, Schedule of Asset Held for Investment [Table] Notes receivable from participants EBP, Note Receivable from Participant dei_EntityTaxIdentificationNumber Entity Tax Identification Number EBP, Investment, Fair Value and NAV [Text Block] Entity [Domain] Entity Central Index Key Net appreciation in fair value of investments dei_EntityRegistrantName Entity Registrant Name EBP, Contribution [Policy Text Block] Entity Current Reporting Status EBP, Description of Plan [Text Block] EBP, Asset Held for Investment EBP, Related Party and Party-in-Interest Transactions [Table] Current Fiscal Year End Date us-gaap-ebp_EmployeeBenefitPlanTaxDeterminationLetterDate EBP, Tax Determination Letter, Date EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncrease Total additions Entity Shell Company Common Collective Trust [Member] Entity Emerging Growth Company Entity Small Business Investments [Domain] EBP, Employer, Common Stock [Member] us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForPaymentToParticipant Participant distributions and withdrawals Accounting Policies [Abstract] Rollover contributions EBP, Risk and Uncertainty [Table] us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForIncomeLossOnInvestment Total investment income us-gaap-ebp_EmployeeBenefitPlanTaxQualificationStatusExtensibleEnumeration EBP, Tax Qualification Status [Extensible Enumeration] Valuation Approach and Technique [Domain] Valuation, Market Approach [Member] us-gaap-ebp_EbpPlanName EBP, Plan Name Statement of Stockholders' Equity [Abstract] EBP, Tax Status [Text Block] us-gaap-ebp_EmployeeBenefitPlanForfeitedNonvestedAccountDecreaseForAdministrativeExpense EBP, Forfeited Nonvested Account, Decrease from Administrative Expense EBP, Risk and Uncertainty [Table Text Block] EBP 41-0268370 003 [Member] The employee benefit plan EIN 41-0268370 003. ful_EBPNoteReceivableFromParticipantTerm EBP, Note Receivable from Participant, Term (Year) Period for term on note receivable from participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). us-gaap-ebp_EmployeeBenefitPlanInvestmentValuationTechniqueExtensibleEnumeration EBP, Investment, Valuation Technique [Extensible Enumeration] Cash Amount of cash held by the employee stock purchase, saving or similar plan (employee benefit plan (EBP)). H.B. Fuller Company Stock Fund Schedule of Assets [Text Block] Disclosure presenting the schedule of assets. EBP, Risk and Uncertainty [Policy Text Block] Equity Components [Axis] us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValue Total investments ful_EmployeeBenefitPlanInvestmentSharePrice Employee Benefit Plan, Investment, Share Price (in dollars per share) Represents the share price for the employee benefit plan shares. Administration of Plan Assets [Text Block] Disclosure presenting the administration of plan assets. EBP, Other Investment [Member] Class of Stock [Axis] Equity Component [Domain] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 3 [Member] Dividends Fair Value, Inputs, Level 1 [Member] us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease Net increase in net assets available for benefits Deductions: Subsequent Event [Member] us-gaap-ebp_EmployeeBenefitPlanParticipantLoanInterestRate EBP, Asset Held for Investment, Participant Loan, Interest Rate us-gaap-ebp_EmployeeBenefitPlanForfeitedNonvestedAccountDecreaseForEmployerContribution EBP, Forfeited Nonvested Account, Decrease from Employer Contribution EBP, Participant-Directed [Member] Contributions: Subsequent Event Type [Domain] ful_NumberOfEmployeesTransferringPlans Number of Employees Transferring Plans The number of employees transferring ESP plans. Subsequent Event Type [Axis] Investment income: Investments, at fair value Investments EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Legal & General S&P 500 DC Employer contributions us-gaap-ebp_EbpRiskAndUncertaintyConcentrationOfInvestmentAtFairValueToNetAssetsPercentage EBP, Risk and Uncertainty, Concentration of Investment at Fair Value to Net Assets, Percentage us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForAdministrativeExpense Administrative expenses Investment, Identifier [Axis] EBP, Accounting Policy [Table] EBP, Description of Plan [Table] Net Appreciation in the Fair Value of Investments [Policy Text Block] Accounting policy describing the appreciation in the fair value of investments. Concentration of Market Risk [Policy Text Block] Accounting policy describing the concentration of market risks. ful_EBPNonDiscretionaryNonElectiveRetirementContributions EBP, Non-Discretionary Non-Elective Retirement Contributions The percent of non-discretionary non-elective retirement contributions allowed by employees. ful_EBPNonDiscretionaryNonElectiveRetirementContributionsAmount EBP, Non-Discretionary Non-Elective Retirement Contributions, Amount The amount of non-discretionary non-elective retirement contributions made during the period. Statement [Table] ful_EBPAdditionalRothContributionAmountForAges60Through63 EBP, Additional Roth Contribution Amount for Ages 60 Through 63 The amount of additional contribution allowed for a Roth investment for the ages 60-63. ful_EBPDeferralIncreasePercent EBP, Deferral Increase Percent The percent of increase in the deferral percentage if lower than a certain percent. ful_EBPPercentOfEligibleEarningForDeferral EBP, Percent of Eligible Earning for Deferral The percent of deferral eligible earning. ful_EBPEmployeeRothContribution EBP, Employee Roth Contribution The percent of employee contribution pre/post tax for Roth contributions. EBP, Tax Status [Table] Fair Value Hierarchy and NAV [Domain] ful_AnnualDiscretionaryNonElectiveContributionAmountContributed Annual Discretionary Non-Elective Contribution, Amount Contributed The amount of annual discretionary non-elective contribution that was contributed. us-gaap-ebp_EmployeeBenefitPlanPlanNumber EBP, Plan Number ful_EBPAnnualDiscretionaryNonElectiveContributionBasedOnCompaniesEarningPerShare EBP, Annual Discretionary Non-Elective Contribution Based on Companies Earning Per Share The percent of annual discretionary non-elective contribution allowed based on the companies earnings per share. ful_EBPAnnualDiscretionaryNonElectiveContributionPercentContributed EBP, Annual Discretionary Non-Elective Contribution, Percent Contributed The percent of annual discretionary non-elective contribution that was contributed during the period. EBP, Risk and Uncertainty [Text Block] Statement of Financial Position [Abstract] ful_EmployeeBenefitPlanParticipantMinimumAgeRequiredToMakeAdditionalContribution Employee Benefit Plan, Participant Minimum Age Required To Make Additional Contribution The minimum age required to make additional contributions. us-gaap-ebp_EmployeeBenefitPlanInvestmentTypeExtensibleEnumeration H.B. Fuller Company Stock Fund ful_EmployeeBenefitPlanAssetHeldForInvestmentParticipantLoanTransferToFromExternalPlan Employee Benefit Plan, Asset Held For Investment Participant Loan Transfer To (From) External Plan Amount of assets held for investment from participant loans that were transferred to (from) external plans. ful_EmployeeBenefitPlanParticipantContributionNumberOfDaysOfEmployment Employee Benefit Plan, Participant Contribution, Number Of Days Of Employment (Day) The number of days of employment before employees can contribute to the employee benefit plan. ful_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingPercentageOfVestedAccountBalance Employee Benefit Plan, Note Receivable From Participant Account, Maximum Borrowing Percentage Of Vested Account Balance The maximum borrowing percentage of the vested account balance. EBP, Participant-Directed and Nonparticipant-Directed Status [Domain] us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate EBP, Participant Contribution, Automatic, Deferral Rate Mutual Funds And Common Stock [Member] Represents the mutual funds and common stock. Investment Type [Axis] ful_EmployeeBenefitPlanVestingPercentageAfterThreeYearsOfServiceOrUponAge65 Employee Benefit Plan, Vesting Percentage After Three Years Of Service Or Upon Age 65 The vesting percentage after three years of service or reaching the age of 65. ful_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmountVestedAccountBalance Employee Benefit Plan, Note Receivable From Participant Account Maximum Borrowing Amount, Vested Account Balance The maximum borrowing for the vested account balance. Mutual Fund [Member] us-gaap-ebp_EmployeeBenefitPlanEmployerContributionMatchingPercentage EBP, Employer Contribution, Matching Percentage ful_EmployeeBenefitPlanMinimumAgeRequiredToReceiveDistributionInstallments Employee Benefit Plan, Minimum Age Required To Receive Distribution Installments The minimum age required to receive distribution installments. ful_EmployeeBenefitPlanTermOfPermanentDisabilityRequiredToStartDistribution Employee Benefit Plan, Term Of Permanent Disability Required To Start Distribution (Month) The term of permanent disability required to start distributions. us-gaap-ebp_EmployeeBenefitPlanInvestmentNumberOfShares EBP, Investment, Number of Shares (in shares) EBP, Schedule of Asset Held for Investment [Text Block] ful_EBPAdditionalRothContributionsForAges50Through59AndAge64Above EBP, Additional Roth Contributions For Ages 50 Through 59 And Age 64 Above The additional amount allowed to be contributed by employees ages 50 through 59 and above the age of 64. EBP, Use of Estimate [Policy Text Block] ful_EmployeeBenefitPlanParticipantContributionPretaxMaximumAnnualCompensationToTotalCompensationPercentageNonRothPlan Employee Benefit Plan, Participant Contribution Pre-tax Maximum Annual Compensation To Total Compensation Percentage Non-Roth Plan The maximum pre-tax annual compensation percentage to non-Roth plans. us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Other liabilities us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMinimumBorrowingAmount EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount EBP, Expense [Policy Text Block] us-gaap-ebp_EmployeeBenefitPlanParticipantContributionPretaxMaximumAnnualCompensationToTotalCompensationPercentage EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage EBP, Subsequent Event [Policy Text Block] EBP, Schedule of Reportable Transaction [Table] dei_DocumentType Document Type EBP, Summary of Accounting Policy [Text Block] us-gaap-ebp_EmployeeBenefitPlanInvestmentExcludingPlanInterestInMasterTrustCost EBP, Investment, Excluding Plan Interest in Master Trust, Cost Document Information [Line Items] EBP, Investment [Policy Text Block] Employer contributions receivable Document Information [Table] Entity Interactive Data Current Statement [Line Items] Fair Value Hierarchy and NAV [Axis] us-gaap-ebp_EmployeeBenefitPlanAsset Total assets EBP, Payment to Participant [Policy Text Block] us-gaap-ebp_EmployeeBenefitPlanParticipantContributionPretaxMaximumAnnualCompensationAmount EBP, Participant Contribution, Pretax, Maximum Annual Compensation, Amount us-gaap-ebp_EmployeeBenefitPlanInvestmentSoldExcludingPlanInterestInMasterTrustSellingPrice EBP, Investment Sold, Excluding Plan Interest in Master Trust, Selling Price us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage EBP, Employer Contribution, Participant Compensation Matched, Percentage us-gaap-ebp_EmployeeBenefitPlanTaxDeterminationLetterObtained true us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentInvestmentExcludingPlanInterestInMasterTrustParticipationStatusExtensibleEnumeration H.B. Fuller Company Stock Fund us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecrease Total deductions EBP, Related Party and Party-in-Interest Transactions [Text Block] Assets: Beginning of year Net assets available for benefits us-gaap-ebp_EmployeeBenefitPlanInvestmentAcquiredExcludingPlanInterestInMasterTrustCost EBP, Investment Acquired, Excluding Plan Interest in Master Trust, Cost EBP, Investment, Fair Value and NAV [Table Text Block] us-gaap_PolicyTextBlockAbstract Accounting Policies EBP, Investment, Fair Value and NAV [Table] Participant contributions us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements Retirement Plan Tax Status [Domain] us-gaap_TableTextBlock Notes Tables Qualified Plan [Member]