| Document and Entity Information | Jun. 04, 2020 | Apr. 22, 2020 |
| Cover [Abstract] | ||
| Document Type | 8-K | |
| Document Period End Date | Jun. 4, 2020 | |
| Entity Registrant Name | LA-Z-BOY INCORPORATED | |
| Entity Incorporation, State or Country Code | MI | |
| Entity File Number | 1-9656 | |
| Entity Tax Identification Number | 38-0751137 | |
| Entity Address, Address Line One | One La-Z-Boy Drive, | |
| Entity Address, City or Town | Monroe, | |
| Entity Address, State or Province | MI | |
| Entity Address, Postal Zip Code | 48162-5138 | |
| City Area Code | 734 | |
| Local Phone Number | 242-1444 | |
| Written Communications | false | |
| Soliciting Material | false | |
| Pre-commencement Tender Offer | false | |
| Pre-commencement Issuer Tender Offer | false | |
| Title of 12(b) Security | Common Stock, $1.00 par value | |
| Trading Symbol | LZB | |
| Security Exchange Name | NYSE | |
| Entity Emerging Growth Company | false | |
| Entity Central Index Key | 0000057131 | |
| Amendment Flag | false |
