Document and Entity Information - shares
3 Months Ended
Jun. 01, 2019
Jul. 10, 2019
Document and Entity Information [Abstract]    
Entity Registrant Name APOGEE ENTERPRISES, INC.  
Entity Central Index Key 0000006845  
Document Type 10-Q  
Document Period End Date Jun. 01, 2019  
Amendment Flag false  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q1  
Current Fiscal Year End Date --02-29  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   26,518,842
Entity Emerging Growth Company false  
Entity Small Business false  
Entity Current Reporting Status Yes  
Entity Shell Company false