    <SEC-DOCUMENT>0000006845-20-000023-index.html : 20200917
    <SEC-HEADER>0000006845-20-000023.hdr.sgml : 20200917
    <ACCEPTANCE-DATETIME>20200916175534
    ACCESSION NUMBER:		0000006845-20-000023
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		16
    CONFORMED PERIOD OF REPORT:	20200917
    ITEM INFORMATION:		Results of Operations and Financial Condition
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20200917
    DATE AS OF CHANGE:		20200916

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			APOGEE ENTERPRISES, INC.
    		CENTRAL INDEX KEY:			0000006845
    		STANDARD INDUSTRIAL CLASSIFICATION:	GLASS PRODUCTS, MADE OF PURCHASED GLASS [3231]
    		IRS NUMBER:				410919654
    		STATE OF INCORPORATION:			MN
    		FISCAL YEAR END:			0227

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-06365
    		FILM NUMBER:		201179618

    	BUSINESS ADDRESS:
    		STREET 1:		4400 WEST 78TH STREET
    		STREET 2:		SUITE 520
    		CITY:			MINNEAPOLIS
    		STATE:			MN
    		ZIP:			55435
    		BUSINESS PHONE:		6128351874

    	MAIL ADDRESS:
    		STREET 1:		4400 WEST 78TH STREET
    		STREET 2:		SUITE 520
    		CITY:			MINNEAPOLIS
    		STATE:			MN
    		ZIP:			55435

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	APOGEE ENTERPRISES INC
    		DATE OF NAME CHANGE:	19920703

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	HARMON GLASS CO INC
    		DATE OF NAME CHANGE:	19720623
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>apog-20200917.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: apog-20200917.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>a082920fy21q2results.htm
    <DESCRIPTION>EX-99.1
    <TEXT>
    Document 2 - file: a082920fy21q2results.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>3
    <FILENAME>apog-20200917.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
    <TEXT>
    Document 3 - file: apog-20200917.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.CAL
    <SEQUENCE>4
    <FILENAME>apog-20200917_cal.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT
    <TEXT>
    Document 4 - file: apog-20200917_cal.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.DEF
    <SEQUENCE>5
    <FILENAME>apog-20200917_def.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT
    <TEXT>
    Document 5 - file: apog-20200917_def.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>6
    <FILENAME>apog-20200917_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT
    <TEXT>
    Document 6 - file: apog-20200917_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>7
    <FILENAME>apog-20200917_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT
    <TEXT>
    Document 7 - file: apog-20200917_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>apogee1811.jpg
    <TEXT>
    Document 8 - file: apogee1811.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>9
    <FILENAME>apog-20200917_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 9 - file: apog-20200917_htm.html

    Document 9 - RAW XML: apog-20200917_htm.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>10
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 10 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>11
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 11 - file: Financial_Report.xlsx

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>12
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 12 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>13
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 13 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>14
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 14 - file: FilingSummary.html

    Document 14 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>16
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 16 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>17
    <FILENAME>0000006845-20-000023-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 17 - file: 0000006845-20-000023-xbrl.zip

    </DOCUMENT>
    </SEC-DOCUMENT>