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Inventories - Narrative (Details) - USD ($) $ in Millions	Jun. 28, 2025	Dec. 28, 2024
Inventory Disclosure [Abstract]
FIFO inventory allowance	$ 11.6	$ 12.1

X

- Definition

Inventory FIFO Reserve

+ References

No definition available.

+ Details

Name:	hni_InventoryFIFOReserve
Namespace Prefix:	hni_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_InventoryDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration