Document and Entity Information - shares
6 Months Ended
Oct. 27, 2018
Nov. 21, 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   46,833,470
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Oct. 27, 2018