Document and Entity Information - USD ($)
12 Months Ended
Apr. 27, 2019
Jun. 11, 2019
Oct. 26, 2018
Document and Entity Information      
Entity Registrant Name LA-Z-BOY INC    
Entity Central Index Key 0000057131    
Current Fiscal Year End Date --04-27    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 1,290,400,000
Entity Common Stock, Shares Outstanding   46,823,501  
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Document Type 10-K    
Amendment Flag false    
Document Period End Date Apr. 27, 2019    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false