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Revenue Recognition - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jan. 25, 2020 | Jan. 25, 2020 | Apr. 28, 2019
Revenue from Contract with Customer [Abstract] |  |  |
Other receivables, included in other current assets | $ 25.3 | $ 25.3 | $ 17.0
Customer deposits, included in accrued expenses and other current liabilities | 60.9 | 60.9 | 42.8
Deferred revenues, included in accrued expenses and other current liabilities | 25.3 | 25.3 | $ 17.0
Revenue recognized related to contract liabilities | $ 0.5 | $ 55.0 |

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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Namespace Prefix: | lzb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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
Name: | lzb_ContractWithCustomerLiabilityForDeferredRevenueCurrent
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
Name: | us-gaap_ContractWithCustomerLiabilityRevenueRecognized
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
Name: | us-gaap_OtherReceivablesNetCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration