| Cover Page | Sep. 17, 2019 |
| Cover page. | |
| Document Type | 8-K |
| Document Period End Date | Sep. 17, 2019 |
| Entity Registrant Name | APOGEE ENTERPRISES, INC. |
| Entity Incorporation, State or Country Code | MN |
| Entity File Number | 0-6365 |
| Entity Tax Identification Number | 41-0919654 |
| Entity Address, Address Line One | 4400 West 78th Street, Suite 520 |
| Entity Address, City or Town | Minneapolis |
| Entity Address, State or Province | MN |
| Entity Address, Postal Zip Code | 55435 |
| City Area Code | 952 |
| Local Phone Number | 835-1874 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, $0.33 1/3 Par Value |
| Trading Symbol | APOG |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000006845 |
| Amendment Flag | false |
