Document and Entity Information - shares	9 Months Ended
	Nov. 30, 2017	May 02, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	AZZ INC
Entity Central Index Key	0000008947
Document Type	10-Q
Document Period End Date	Nov. 30, 2017
Amendment Flag	false
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--02-28
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		26,024,006