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Revenue Recognition - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended |
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Jul. 27, 2019 | Apr. 29, 2018
Revenue Recognition |  |
Other receivables, included in other current assets | $ 18.9 | $ 17.0
Customer deposits, included in accrued expenses and other current liabilities | 48.8 | 42.8
Deferred revenues, included in accrued expenses and other current liabilities | 18.9 | $ 17.0
Revenue recognized related to contract liabilities | $ 52.4 |
Revenue, practical expedient elected for financing components of contracts with one year or less duration | true |

X
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received, classified as current. + References No definition available. + Details
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Balance Type: | credit
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X
- Definition Amount of obligation to transfer good or service to customer for which consideration is receivable, classified as current. + References No definition available. + Details
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Namespace Prefix: | lzb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, after allowance, of receivables classified as other, due within one year or the operating cycle, if longer. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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X
- Definition Indicates (true false) whether practical expedient was elected not to adjust consideration for effect of financing component when transfer and customer payment for product or service occurs within one year or less. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130569-203045 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration