Income Taxes - Narrative (Details) $ in Millions	12 Months Ended
Jan. 01, 2022 USD ($)
Income Tax Disclosure [Abstract]
Benefit related to change in estimate of research and development credits and other items	$ 0.4

Effective Income Tax Rate Reconciliation, Change In Estimate Of Research And Development Credits And Other Items

No definition available.

Name:	hni_EffectiveIncomeTaxRateReconciliationChangeInEstimateOfResearchAndDevelopmentCreditsAndOtherItems
Namespace Prefix:	hni_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration