Document And Entity Information - USD ($)	12 Months Ended
	Nov. 28, 2020	Jan. 21, 2021	May 29, 2020
Document Information [Line Items]
Entity Central Index Key	0000039368
Entity Registrant Name	FULLER H B CO
Amendment Flag	false
Current Fiscal Year End Date	--11-28
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2020
Document Type	10-K
Document Annual Report	true
Document Period End Date	Nov. 28, 2020
Document Transition Report	false
Entity File Number	001-09225
Entity Incorporation, State or Country Code	MN
Entity Tax Identification Number	41-0268370
Entity Address, Address Line One	1200 Willow Lake Boulevard
Entity Address, City or Town	St. Paul
Entity Address, State or Province	MN
Entity Address, Postal Zip Code	55110-5101
City Area Code	651
Local Phone Number	236-5900
Title of 12(b) Security	Common Stock, par value $1.00
Trading Symbol	FUL
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 1,924,019,850
Entity Common Stock, Shares Outstanding		51,969,463