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Retirement and Welfare, Deferred Compensation (Details) (USD $)
Apr. 25, 2015
Apr. 26, 2014
Other current assets    
Retirement and Welfare    
Market value of mutual funds $ 1,100,000us-gaap_TradingSecurities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember		 $ 1,800,000us-gaap_TradingSecurities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember
PCRP | Other long-term liabilities    
Retirement and Welfare    
Deferred compensation arrangement obligations 3,900,000us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherNoncurrentLiabilitiesMember
/ us-gaap_DefinedContributionPlanNameAxis
= lzb_PerformanceCompensationRetirementPlanMember		 2,500,000us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherNoncurrentLiabilitiesMember
/ us-gaap_DefinedContributionPlanNameAxis
= lzb_PerformanceCompensationRetirementPlanMember
Executive deferred compensation plan | Other long-term liabilities    
Retirement and Welfare    
Deferred compensation arrangement obligations 15,600,000us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherNoncurrentLiabilitiesMember
/ us-gaap_DefinedContributionPlanNameAxis
= lzb_ExecutiveDeferredCompensationPlanMember		 12,300,000us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherNoncurrentLiabilitiesMember
/ us-gaap_DefinedContributionPlanNameAxis
= lzb_ExecutiveDeferredCompensationPlanMember
Executive deferred compensation plan | Other long-term assets    
Retirement and Welfare    
Cash surrender value of life insurance contracts 17,400,000us-gaap_CashSurrenderValueOfLifeInsurance
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherNoncurrentAssetsMember
/ us-gaap_DefinedContributionPlanNameAxis
= lzb_ExecutiveDeferredCompensationPlanMember		 10,900,000us-gaap_CashSurrenderValueOfLifeInsurance
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherNoncurrentAssetsMember
/ us-gaap_DefinedContributionPlanNameAxis
= lzb_ExecutiveDeferredCompensationPlanMember
Executive deferred compensation plan | Other current assets    
Retirement and Welfare    
Market value of mutual funds $ 1,100,000us-gaap_TradingSecurities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember
/ us-gaap_DefinedContributionPlanNameAxis
= lzb_ExecutiveDeferredCompensationPlanMember		 $ 1,800,000us-gaap_TradingSecurities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember
/ us-gaap_DefinedContributionPlanNameAxis
= lzb_ExecutiveDeferredCompensationPlanMember