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Goodwill and Other Intangible Assets (Narrative) (Details) (USD $)
12 Months Ended 6 Months Ended 3 Months Ended
Jan. 03, 2015
Dec. 28, 2013
Dec. 29, 2012
Jun. 28, 2014
Jan. 03, 2015
Goodwill [Line Items]          
Capitalized software, amortization $ 3,300,000us-gaap_CapitalizedComputerSoftwareAmortization $ 2,900,000us-gaap_CapitalizedComputerSoftwareAmortization $ 1,900,000us-gaap_CapitalizedComputerSoftwareAmortization    
Amortization expense for definite-lived intangibles 7,200,000us-gaap_AmortizationOfIntangibleAssets 7,400,000us-gaap_AmortizationOfIntangibleAssets 7,000,000us-gaap_AmortizationOfIntangibleAssets    
Goodwill 279,310,000us-gaap_Goodwill 286,655,000us-gaap_Goodwill 288,348,000us-gaap_Goodwill   279,310,000us-gaap_Goodwill
Goodwill, Impairment Loss 22,802,000us-gaap_GoodwillImpairmentLoss        
Trade Names [Member]          
Goodwill [Line Items]          
Trade names, net value 41,000,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
41,000,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
41,000,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
  41,000,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
One Trade Name [Member]          
Goodwill [Line Items]          
Discount rate utilized for each reporting unit with rates range 13.00%hni_DiscountRateUtilizedForEachReportingUnitWithRatesRange
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= hni_OneTradeNameMember
       
Terminal growth 3.00%hni_TerminalGrowthUtilizedforEachReportingUnitwithRatesRange
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= hni_OneTradeNameMember
       
Fair value exceeds carrying value, percent 6.00%hni_FairValueExceedsCarryingValueGoodwillPercent
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= hni_OneTradeNameMember
       
Trade names, net value 11,200,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= hni_OneTradeNameMember
      11,200,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= hni_OneTradeNameMember
Royalty rate 2.50%hni_RoyaltyRateUtilizedforEachReportingUnitwithRatesRange
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= hni_OneTradeNameMember
       
Reporting Unit One [Member]          
Goodwill [Line Items]          
Discount rate utilized for each reporting unit with rates range 11.00%hni_DiscountRateUtilizedForEachReportingUnitWithRatesRange
/ us-gaap_StatementBusinessSegmentsAxis
= hni_ReportingUnitOneMember
       
Terminal growth 3.00%hni_TerminalGrowthUtilizedforEachReportingUnitwithRatesRange
/ us-gaap_StatementBusinessSegmentsAxis
= hni_ReportingUnitOneMember
       
Fair value exceeds carrying value, percent 2.00%hni_FairValueExceedsCarryingValueGoodwillPercent
/ us-gaap_StatementBusinessSegmentsAxis
= hni_ReportingUnitOneMember
       
Goodwill 3,000,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= hni_ReportingUnitOneMember
      3,000,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= hni_ReportingUnitOneMember
Decrease in fair value for every 100 basis point increase in discount rate 2,000,000hni_DecreaseinFairValueforEvery100BasisPointIncreaseinDiscountRate
/ us-gaap_StatementBusinessSegmentsAxis
= hni_ReportingUnitOneMember
       
Decrease in fair value for every 100 basis point decrease in long-term growth rate 1,000,000hni_DecreaseinFairValueforEvery100BasisPointDecreaseinLongtermGrowthRate
/ us-gaap_StatementBusinessSegmentsAxis
= hni_ReportingUnitOneMember
       
Goodwill, Impairment Loss       8,900,000us-gaap_GoodwillImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= hni_ReportingUnitOneMember
 
Reporting Unit Two [Member]          
Goodwill [Line Items]          
Goodwill, Impairment Loss         13,900,000us-gaap_GoodwillImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= hni_ReportingUnitTwoMember
Office Furniture [Member]          
Goodwill [Line Items]          
Goodwill 97,552,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= hni_OfficeFurnitureMember
120,610,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= hni_OfficeFurnitureMember
122,303,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= hni_OfficeFurnitureMember
  97,552,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= hni_OfficeFurnitureMember
Goodwill, Impairment Loss $ 22,802,000us-gaap_GoodwillImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= hni_OfficeFurnitureMember
       
Minimum [Member] | Reporting Unit One [Member]          
Goodwill [Line Items]          
Near term growth (4.10%)hni_NearTermGrowthUtilizedforEachReportingUnitwithRatesRange
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatementBusinessSegmentsAxis
= hni_ReportingUnitOneMember
       
Maximum [Member] | Reporting Unit One [Member]          
Goodwill [Line Items]          
Near term growth 11.00%hni_NearTermGrowthUtilizedforEachReportingUnitwithRatesRange
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementBusinessSegmentsAxis
= hni_ReportingUnitOneMember