v3.5.0.1
Document and Entity Information - USD ($)
$ in Millions
12 Months Ended
Apr. 30, 2016
Jun. 14, 2016
Oct. 24, 2015
Document and Entity Information [Abstract]      
Entity Registrant Name LA-Z-BOY INC    
Entity Central Index Key 0000057131    
Current Fiscal Year End Date --04-30    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 1,433.2
Entity Common Stock, Shares Outstanding   48,921,157  
Document Fiscal Year Focus 2016    
Document Fiscal Period Focus FY    
Document Type 10-K    
Amendment Flag false    
Document Period End Date Apr. 30, 2016