Revenue from Contracts with Customers - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 29, 2025	Dec. 28, 2024
Revenue from Contract with Customer [Abstract]
Contract liability, customer deposits	$ 34.0	$ 42.1
Revenue recognized	$ 30.4

Contract With Customer, Liability, Customer Deposits, Revenue Recognized

No definition available.

Name:	hni_ContractWithCustomerLiabilityCustomerDepositsRevenueRecognized
Namespace Prefix:	hni_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration