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Accounting Policies - Variable Interest Entities (Details) - Variable interest entities, not primary beneficiary	Apr. 28, 2018 company
Investments
Preferred share investments, number of privately-held companies	2
Preferred share investments with common share warrant, number of privately-held companies	1

X

- Definition

The number of privately-held companies in which the entity holds investments in preferred shares.

+ References

No definition available.

+ Details

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Namespace Prefix:	lzb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The number of investments in privately-held companies in which the entity holds a warrant to purchase common shares.

+ References

No definition available.

+ Details

Name:	lzb_InvestmentsPreferredSharesWithCommonShareWarrantNumberOfPrivatelyHeldCompanies
Namespace Prefix:	lzb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

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

X

- Details

Name:	us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis=us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: