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Revenue from Contracts with Customers - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Apr. 03, 2021 | Oct. 02, 2021
Revenue from Contract with Customer [Abstract] |  |
Revenue recognized | $ 21.1 |
Payment terms |  | 30 days

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- Definition Revenue Recognition, Payment Terms + References No definition available. + Details
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Namespace Prefix: | hni_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- 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=123351226&loc=SL49130549-203045 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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