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Revenue from Contracts with Customers - Narrative (Details) $ in Millions	3 Months Ended
	Apr. 03, 2021 USD ($)
Revenue from Contract with Customer [Abstract]
Revenue recognized	$ 21.1
Payment terms	30 days

X

- Definition

Revenue Recognition, Payment Terms

+ References

No definition available.

+ Details

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Namespace Prefix:	hni_
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Balance Type:	na
Period Type:	duration

X

- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

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