Document and Entity Information	3 Months Ended
	May 31, 2019 shares
Document and Entity Information [Abstract]
Entity Registrant Name	AZZ INC
Entity Central Index Key	0000008947
Document Type	10-Q
Document Period End Date	May 31, 2019
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--02-28
Entity Current Reporting Status	Yes
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	26,151,966