Document and Entity Information - USD ($)	12 Months Ended
	Feb. 28, 2017	Apr. 10, 2017	Aug. 31, 2016
Document and Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Feb. 28, 2017
Entity Registrant Name	AZZ INC
Entity Central Index Key	0000008947
Current Fiscal Year End Date	--02-28
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2017
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		26,020,582
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 1,704,959,032