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

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- 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

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- References No definition available. + Details
Name: | us-gaap_InventoryDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration