The amount of annual discretionary non-elective contribution that was contributed.

No definition available.

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- Definition

The amount of additional contribution allowed for a Roth investment for the ages 60-63.

+ References

No definition available.

+ Details

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- Definition

The additional amount allowed to be contributed by employees ages 50 through 59 and above the age of 64.

+ References

No definition available.

+ Details

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- Definition

The percent of annual discretionary non-elective contribution allowed based on the companies earnings per share.

+ References

No definition available.

+ Details

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- Definition

The percent of annual discretionary non-elective contribution that was contributed during the period.

+ References

No definition available.

+ Details

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- Definition

The percent of increase in the deferral percentage if lower than a certain percent.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
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- Definition

The percent of employee contribution pre/post tax for Roth contributions.

+ References

No definition available.

+ Details

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- Definition

The percent of non-discretionary non-elective retirement contributions allowed by employees.

+ References

No definition available.

+ Details

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- Definition

The amount of non-discretionary non-elective retirement contributions made during the period.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Period for term on note receivable from participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The percent of deferral eligible earning.

+ References

No definition available.

+ Details

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Namespace Prefix:	ful_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of assets held for investment from participant loans that were transferred to (from) external plans.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The minimum age required to receive distribution installments.

+ References

No definition available.

+ Details

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Namespace Prefix:	ful_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The maximum borrowing for the vested account balance.

+ References

No definition available.

+ Details

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Namespace Prefix:	ful_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The maximum borrowing percentage of the vested account balance.

+ References

No definition available.

+ Details

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Namespace Prefix:	ful_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of days of employment before employees can contribute to the employee benefit plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	ful_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The maximum pre-tax annual compensation percentage to non-Roth plans.

+ References

No definition available.

+ Details

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Namespace Prefix:	ful_
Data Type:	dtr-types:percentItemType
Balance Type:	na
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- Definition

The minimum age required to make additional contributions.

+ References

No definition available.

+ Details

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Namespace Prefix:	ful_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The term of permanent disability required to start distributions.

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The vesting percentage after three years of service or reaching the age of 65.

+ References

No definition available.

+ Details

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Namespace Prefix:	ful_
Data Type:	dtr-types:percentItemType
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- Definition

The number of employees transferring ESP plans.

+ References

No definition available.

+ Details

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Namespace Prefix:	ful_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of net asset available for benefit transferred to (from) employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) from (to) external plan.

+ References

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/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule III))
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-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 45
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477063/962-205-45-8

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

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

+ References

+ Details

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- Definition

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

+ References

+ Details

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (j)
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
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-Name Accounting Standards Codification
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-Subparagraph (SX 210.6A-04(5)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

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

+ References

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
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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

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- Definition

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

+ References

+ Details

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- Definition

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.

+ References

+ Details

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- Definition

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

+ References

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Period Type:	instant

- Definition

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

+ References

+ Details

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- Definition

Amount of maximum pretax annual compensation that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), is permitted to contribute.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

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- Definition

Percentage of maximum pretax annual compensation that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), is permitted to contribute to total pretax annual compensation.

+ References

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- Definition

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

+ References

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
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-Publisher FASB
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Note 1 - Description of the Plan (Details Textual) - EBP 41-0268370 003 [Member]	1 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2025 USD ($)	Mar. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Number of Employees Transferring Plans			175
EBP, Change in Net Asset Available for Benefit, Transfer to (from) Plan	$ 17,790,158		$ 321,892	$ 4,400,439
Employee Benefit Plan, Asset Held For Investment Participant Loan Transfer To (From) External Plan			$ 321,892
EBP, Participant Contribution, Automatic, Deferral Rate			4.00%
Employee Benefit Plan, Participant Contribution, Number Of Days Of Employment (Day)			30 days
EBP, Employee Roth Contribution			1.00%
EBP, Deferral Increase Percent			1.00%
Employee Benefit Plan, Participant Minimum Age Required To Make Additional Contribution			50
EBP, Additional Roth Contributions For Ages 50 Through 59 And Age 64 Above			$ 7,500
EBP, Additional Roth Contribution Amount for Ages 60 Through 63			$ 11,250
Employee Benefit Plan, Participant Contribution Pre-tax Maximum Annual Compensation To Total Compensation Percentage Non-Roth Plan			3.00%
EBP, Employer Contribution, Matching Percentage			100.00%
EBP, Employer Contribution, Participant Compensation Matched, Percentage			4.00%
EBP, Non-Discretionary Non-Elective Retirement Contributions			1.00%
EBP, Non-Discretionary Non-Elective Retirement Contributions, Amount			$ 2,786,030
EBP, Annual Discretionary Non-Elective Contribution Based on Companies Earning Per Share			3.00%
EBP, Annual Discretionary Non-Elective Contribution, Percent Contributed			1.00%
Annual Discretionary Non-Elective Contribution, Amount Contributed				$ 0
Employee Benefit Plan, Minimum Age Required To Receive Distribution Installments			55
Employee Benefit Plan, Term Of Permanent Disability Required To Start Distribution (Month)			12 months
Employee Benefit Plan, Vesting Percentage After Three Years Of Service Or Upon Age 65			65.00%
EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount			$ 1,000
EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount			50,000
Employee Benefit Plan, Note Receivable From Participant Account Maximum Borrowing Amount, Vested Account Balance			$ 10,000
Employee Benefit Plan, Note Receivable From Participant Account, Maximum Borrowing Percentage Of Vested Account Balance			50.00%
EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage			100.00%
EBP, Asset Held for Investment, Participant Loan, Interest Rate			6.75%	7.50%
EBP, Forfeited Nonvested Account, Decrease from Administrative Expense			$ 436,929
EBP, Forfeited Nonvested Account, Decrease from Employer Contribution			$ 150,172
Subsequent Event [Member]
Annual Discretionary Non-Elective Contribution, Amount Contributed		$ 2,566,547
Maximum [Member]
EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage			75.00%
EBP, Participant Contribution, Pretax, Maximum Annual Compensation, Amount			$ 23,500
EBP, Percent of Eligible Earning for Deferral			10.00%
EBP, Asset Held for Investment, Participant Loan, Interest Rate			8.50%	8.50%
EBP, Note Receivable from Participant, Term (Year)			15 years
Minimum [Member]
EBP, Asset Held for Investment, Participant Loan, Interest Rate			3.25%	3.25%
EBP, Note Receivable from Participant, Term (Year)			5 years