Cover Page - USD ($)	12 Months Ended
	Feb. 29, 2020	Apr. 22, 2020	Aug. 31, 2019
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Feb. 29, 2020
Document Transition Report	false
Entity File Number	0-6365
Entity Registrant Name	APOGEE ENTERPRISES, INC.
Entity Incorporation, State or Country Code	MN
Entity Tax Identification Number	41-0919654
Entity Address, Address Line One	4400 West 78th Street
Entity Address, Address Line Two	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
Title of 12(b) Security	Common Stock, $0.33 1/3 Par Value
Trading Symbol	APOG
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 981,000,000
Entity Common Stock, Shares Outstanding		26,149,688
Entity Central Index Key	0000006845
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--02-29