The percentage of the warranty liability that relates to the reportable segment.

No definition available.

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

- Definition

The period between issuance and expiration of product warranties.

+ References

No definition available.

+ Details

Name:	lzb_ProductWarrantyTerm
Namespace Prefix:	lzb_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (c)(5)
-URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.15(5))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_ProductWarrantyAccrual
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of increase in the standard and extended product warranty accrual from a business acquisition.

+ References

+ Details

Name:	us-gaap_ProductWarrantyAccrualAdditionsFromBusinessAcquisition
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of decrease in the standard and extended product warranty accrual from payments made in cash or in kind to satisfy claims under the terms of the standard and extended product warranty.

+ References

+ Details

Name:	us-gaap_ProductWarrantyAccrualPayments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of increase in the standard and extended product warranty accrual from warranties issued.

+ References

+ Details

Name:	us-gaap_ProductWarrantyAccrualWarrantiesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount as of the balance sheet date of the aggregate standard product warranty liability that is expected to be paid within one year or the normal operating cycle, if longer. Does not include the balance for the extended product warranty liability.

+ References

No definition available.

+ Details

Name:	us-gaap_StandardProductWarrantyAccrualCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=lzb_UpholsterySegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ProductOrServiceAxis=lzb_FabricAndLeatherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ProductOrServiceAxis=lzb_PaddingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ProductOrServiceAxis=lzb_LaborCostsRelatingToPartsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Product Warranties (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Product Warranties (Details) - USD ($) $ in Thousands	Jan. 26, 2019	Jan. 27, 2018	Jan. 26, 2019	Jan. 27, 2018	Apr. 28, 2018
Reconciliation of changes in product warranty liability
Balance as of the beginning of the period	$ 25,197	$ 21,606	$ 21,205	$ 21,870
Acquisitions			4,100
Accruals during the period	5,660	4,654	16,270	14,155
Settlements during the period	(5,560)	(4,954)	(16,278)	(14,719)
Balance as of the end of the period	25,297	$ 21,306	25,297	$ 21,306
Product warranty liability included in accrued expenses and other current liabilities	$ 16,700		$ 16,700		$ 12,700
Minimum \| Upholstery Segment
Product Warranties
Percentage of warranty liability relating to the segment			80.00%
Fabric and leather \| Upholstery Segment
Product Warranties
Warranty term			1 year
Cushions and padding \| Minimum \| Upholstery Segment
Product Warranties
Warranty term			1 year
Cushions and padding \| Maximum \| Upholstery Segment
Product Warranties
Warranty term			10 years
Labor costs relating to parts \| Upholstery Segment
Product Warranties
Warranty term			1 year