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Income Taxes - Valuation Allowance (Details) $ in Thousands	12 Months Ended
	Apr. 28, 2018 USD ($)
Summary of valuation allowance by jurisdiction
Valuation Allowance, beginning of the period	$ 1,786
Change	(562)
Valuation Allowance, end of the period	1,224
U.S. state
Summary of valuation allowance by jurisdiction
Valuation Allowance, beginning of the period	1,769
Change	(562)
Valuation Allowance, end of the period	1,207
Foreign
Summary of valuation allowance by jurisdiction
Valuation Allowance, beginning of the period	17
Valuation Allowance, end of the period	$ 17

X

- 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

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Namespace Prefix:	lzb_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=84176650&loc=d3e32123-109318

+ Details

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X

- Details

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Namespace Prefix:
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Period Type:

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type: