Document and Entity Information - shares
6 Months Ended
Sep. 01, 2018
Oct. 08, 2018
Document and Entity Information [Abstract]    
Entity Registrant Name APOGEE ENTERPRISES, INC.  
Entity Central Index Key 0000006845  
Document Type 10-Q  
Document Period End Date Sep. 01, 2018  
Amendment Flag false  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Current Fiscal Year End Date --03-02  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   28,182,387