Document and Entity Information - USD ($)	12 Months Ended
	Feb. 29, 2020	Apr. 16, 2020	Aug. 31, 2019
Document and Entity Information [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Feb. 29, 2020
Document Transition Report	false
Entity File Number	1-12777
Entity Registrant Name	AZZ Inc.
Entity Incorporation, State or Country Code	TX
Entity Tax Identification Number	75-0948250
Entity Address, Address Line One	One Museum Place, Suite 500
Entity Address, Address Line Two	3100 West 7th Street
Entity Address, City or Town	Fort Worth
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	76107
City Area Code	817
Local Phone Number	810-0095
Title of 12(b) Security	Common Stock
Trading Symbol	AZZ
Security Exchange Name	NYSE
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			$ 1,066,597,439
Entity Common Stock, Shares Outstanding		26,147,964
Documents Incorporated by Reference [Text Block]	Portions of the registrant's Proxy Statement for its 2020 Annual Meeting of Shareholders to be filed with the Securities and Exchange Commission pursuant to Regulation 14A not later than 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K are incorporated by reference into Part III, Items 10-14 of this Annual Report on Form 10-K.
Entity Central Index Key	0000008947
Current Fiscal Year End Date	--02-28
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2020
Amendment Flag	false