Document and Entity Information - shares
6 Months Ended
Sep. 02, 2017
Oct. 11, 2017
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. 02, 2017  
Amendment Flag false  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q2  
Current Fiscal Year End Date --03-03  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   28,642,749