Cover Page - USD ($)	12 Months Ended
	Jan. 01, 2022	Feb. 04, 2022	Jul. 03, 2021
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Current Fiscal Year End Date	--01-01
Document Period End Date	Jan. 01, 2022
Document Transition Report	false
Entity File Number	1-14225
Entity Registrant Name	HNI Corporation
Entity Incorporation, State or Country Code	IA
Entity Tax Identification Number	42-0617510
Entity Address, Address Line One	600 East Second Street
Entity Address, Address Line Two	P. O. Box 1109
Entity Address, City or Town	Muscatine
Entity Address, State or Province	IA
Entity Address, Postal Zip Code	52761-0071
City Area Code	563
Local Phone Number	272-7400
Title of 12(b) Security	Common Stock
Trading Symbol	HNI
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
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 1,136,887,520
Entity Common Stock, Share Outstanding		42,338,775
Documents Incorporated by Reference	Portions of the Registrant's Definitive Proxy Statement on Schedule 14A for the Annual Meeting of Shareholders to be held on May 26, 2022 are incorporated by reference into Part III.
Entity Central Index Key	0000048287
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	false