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Basis of Presentation - Legal Settlements (Details)	3 Months Ended	6 Months Ended
	Oct. 28, 2017	Oct. 28, 2017
Basis of Presentation
Improvement in gross margin due to legal settlement (as a percent)	0.10%	0.40%

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- Definition

Represents the percentage improvement in gross margin resulting from a legal settlement.

+ References

No definition available.

+ Details

Name:	lzb_PercentageOfGrossMarginImprovedDueToLegalSettlement
Namespace Prefix:	lzb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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