Document and Entity Information - shares
3 Months Ended
Jul. 28, 2018
Aug. 14, 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 Current Reporting Status Yes  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   46,687,129
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jul. 28, 2018