Schedule H, line 4i - Schedule of Investments 2 (Details) - EBP 41-0268370 003 [Member]	12 Months Ended
Dec. 31, 2025 USD ($)
Investment, Identifier [Axis]: BlackrockTotalRetutnBondFundMember
H.B. Fuller Company Stock Fund	Common Collective Trust [Member]
H.B. Fuller Company Stock Fund	EBP, Participant-Directed [Member]
H.B. Fuller Company Stock Fund	$ 17,200,036
Investment, Identifier [Axis]: BostonTrustWaldenSmidCapCITMember
H.B. Fuller Company Stock Fund	Common Collective Trust [Member]
H.B. Fuller Company Stock Fund	EBP, Participant-Directed [Member]
H.B. Fuller Company Stock Fund	$ 16,849,800
Investment, Identifier [Axis]: CommonStockMember
true	true
H.B. Fuller Company Stock Fund	Common Stock [Member]
H.B. Fuller Company Stock Fund	EBP, Participant-Directed [Member]
H.B. Fuller Company Stock Fund	$ 19,944,995
Investment, Identifier [Axis]: FidelityUSBondIndexMember
H.B. Fuller Company Stock Fund	Mutual Fund [Member]
H.B. Fuller Company Stock Fund	EBP, Participant-Directed [Member]
H.B. Fuller Company Stock Fund	$ 25,222,296
Investment, Identifier [Axis]: GQCPartnersInternationalEquityCITDMember
H.B. Fuller Company Stock Fund	Common Collective Trust [Member]
H.B. Fuller Company Stock Fund	EBP, Participant-Directed [Member]
H.B. Fuller Company Stock Fund	$ 20,045,237
Investment, Identifier [Axis]: Legal&GeneralACWIEXUSDCMember
H.B. Fuller Company Stock Fund	Common Collective Trust [Member]
H.B. Fuller Company Stock Fund	EBP, Participant-Directed [Member]
H.B. Fuller Company Stock Fund	$ 21,355,829
Investment, Identifier [Axis]: Legal&GeneralS&P500DCMember
H.B. Fuller Company Stock Fund	Common Collective Trust [Member]
H.B. Fuller Company Stock Fund	EBP, Participant-Directed [Member]
H.B. Fuller Company Stock Fund	$ 136,483,182
Investment, Identifier [Axis]: ParticipantLoansMember
true	true
EBP, Investment, Excluding Plan Interest in Master Trust, Cost	$ 0
Investment, Identifier [Axis]: StatStRealAssetNLCLCMember
H.B. Fuller Company Stock Fund	Common Collective Trust [Member]
H.B. Fuller Company Stock Fund	EBP, Participant-Directed [Member]
H.B. Fuller Company Stock Fund	$ 2,781,245
Investment, Identifier [Axis]: StateStRusselSmall/MidIDXSLCLMember
H.B. Fuller Company Stock Fund	Common Collective Trust [Member]
H.B. Fuller Company Stock Fund	EBP, Participant-Directed [Member]
H.B. Fuller Company Stock Fund	$ 40,851,850
Investment, Identifier [Axis]: VanguardRMTSavingsTrustMember
H.B. Fuller Company Stock Fund	Common Collective Trust [Member]
H.B. Fuller Company Stock Fund	EBP, Participant-Directed [Member]
H.B. Fuller Company Stock Fund	$ 24,451,648
Investment, Identifier [Axis]: VanguardTgtRmt2020InvFundMember
H.B. Fuller Company Stock Fund	Common Collective Trust [Member]
H.B. Fuller Company Stock Fund	EBP, Participant-Directed [Member]
H.B. Fuller Company Stock Fund	$ 7,891,032
Investment, Identifier [Axis]: VanguardTgtRmt2025InvFundMember
H.B. Fuller Company Stock Fund	Common Collective Trust [Member]
H.B. Fuller Company Stock Fund	EBP, Participant-Directed [Member]
H.B. Fuller Company Stock Fund	$ 18,140,965
Investment, Identifier [Axis]: VanguardTgtRmt2030InvFundMember
H.B. Fuller Company Stock Fund	Common Collective Trust [Member]
H.B. Fuller Company Stock Fund	EBP, Participant-Directed [Member]
H.B. Fuller Company Stock Fund	$ 36,033,336
Investment, Identifier [Axis]: VanguardTgtRmt2035InvFundMember
H.B. Fuller Company Stock Fund	Common Collective Trust [Member]
H.B. Fuller Company Stock Fund	EBP, Participant-Directed [Member]
H.B. Fuller Company Stock Fund	$ 43,315,505
Investment, Identifier [Axis]: VanguardTgtRmt2040InvFundMember
H.B. Fuller Company Stock Fund	Common Collective Trust [Member]
H.B. Fuller Company Stock Fund	EBP, Participant-Directed [Member]
H.B. Fuller Company Stock Fund	$ 26,795,981
Investment, Identifier [Axis]: VanguardTgtRmt2045InvFundMember
H.B. Fuller Company Stock Fund	Common Collective Trust [Member]
H.B. Fuller Company Stock Fund	EBP, Participant-Directed [Member]
H.B. Fuller Company Stock Fund	$ 24,365,771
Investment, Identifier [Axis]: VanguardTgtRmt2050InvFundMember
H.B. Fuller Company Stock Fund	Common Collective Trust [Member]
H.B. Fuller Company Stock Fund	EBP, Participant-Directed [Member]
H.B. Fuller Company Stock Fund	$ 28,590,292
Investment, Identifier [Axis]: VanguardTgtRmt2055InvFundMember
H.B. Fuller Company Stock Fund	Common Collective Trust [Member]
H.B. Fuller Company Stock Fund	EBP, Participant-Directed [Member]
H.B. Fuller Company Stock Fund	$ 19,441,064
Investment, Identifier [Axis]: VanguardTgtRmt2060InvFundMember
H.B. Fuller Company Stock Fund	Common Collective Trust [Member]
H.B. Fuller Company Stock Fund	EBP, Participant-Directed [Member]
H.B. Fuller Company Stock Fund	$ 11,905,537
Investment, Identifier [Axis]: VanguardTgtRmt2065InvFundMember
H.B. Fuller Company Stock Fund	Common Collective Trust [Member]
H.B. Fuller Company Stock Fund	EBP, Participant-Directed [Member]
H.B. Fuller Company Stock Fund	$ 4,095,059
Investment, Identifier [Axis]: VanguardTgtRmt2070InvFundMember
H.B. Fuller Company Stock Fund	Common Collective Trust [Member]
H.B. Fuller Company Stock Fund	EBP, Participant-Directed [Member]
H.B. Fuller Company Stock Fund	$ 1,245,347
Investment, Identifier [Axis]: VanguardTgtRmtINCMTrustMember
H.B. Fuller Company Stock Fund	Common Collective Trust [Member]
H.B. Fuller Company Stock Fund	EBP, Participant-Directed [Member]
H.B. Fuller Company Stock Fund	$ 5,161,402

Current value of investment, excluding plan interest in master trust, in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Includes, but is not limited to, derivative, investment measured at net asset value per share as practical expedient, and insurance contract.

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

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- Definition

Indicates status of participation by participant for investment, excluding plan interest in master trust, in schedule of asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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- Definition

Indicates (true false) whether asset held for investment of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) was transacted with party-in-interest.

+ References

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- Definition

Cost of investment, excluding plan interest in master trust, held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Includes, but is not limited to, derivative, investment measured at net asset value per share as practical expedient, and insurance contract.

+ References

Reference 1: 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

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-02(d))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (4)
-Publisher DOL-EBSA

Reference 4: 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)(C)
-Publisher DOL-EBSA

+ Details

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- Definition

Indicates type of investment at current value held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: 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

Reference 2: 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)(A)
-Publisher DOL-EBSA

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Employee Retirement Income Security Act of 1974
-Number 2520
-Section 103
-Subsection 10
-Paragraph b
-Subparagraph (2)(i)(A)
-Publisher DOL-EBSA

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