Commitments and Contingencies (Notes)	12 Months Ended
Feb. 28, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and contingencies	Commitments and Contingencies Legal On January 11, 2018, Logan Mullins, acting on behalf of himself and a putative class of persons who purchased or otherwise acquired the Company's securities between April 22, 2015 and January 8, 2018, filed a class action complaint in the U.S. District Court for the Northern District of Texas (the "Court") against the Company and two of its executive officers, Thomas E. Ferguson and Paul W. Fehlman. Logan Mullins v. AZZ, Inc., et al., Case No. 4:18-cv-00025-Y. The complaint alleged, among other things, that the Company's SEC filings contained statements that were rendered materially false and misleading by the Company's alleged failure to properly recognize revenue related to certain contracts in its Energy Segment in purported violation of (1) Section 10(b) of the Exchange Act and Rule 10b-5 and (2) Section 20(a) of the Exchange Act. After the Court appointed a Lead Plaintiff in the case, but before the Company was required to respond to the lawsuit, the Plaintiff voluntarily sought dismissal of the complaint without prejudice. On January 16, 2019, the Court dismissed the case without prejudice. No other parties have sought to reopen the case; therefore, the legal matter is no longer pending. In addition, the Company and its subsidiaries are named defendants in various routine lawsuits incidental to our business. These proceedings include labor and employment claims, use of the Company’s intellectual property, worker’s compensation and various environmental matters, all arising in the normal course of business. Although the outcome of these lawsuits or other proceedings cannot be predicted with certainty, and the amount of any potential liability that could arise with respect to such lawsuits or other matters cannot be predicted at this time, management, after consultation with legal counsel, does not expect liabilities, if any, from these claims or proceedings, either individually or in the aggregate, to have a material effect on the Company’s financial position, results of operations or cash flows. Commodity pricing We have no contracted commitments for any commodities including steel, aluminum, natural gas, cooper, zinc, nickel based alloys, except for those entered into under the normal course of business. Other At February 28, 2019, the Company had outstanding letters of credit in the amount of $44.3 million. These letters of credit are issued for a number of reasons, but are most commonly issued in lieu of customer retention withholding payments covering warranty or performance periods. In addition, as of February 28, 2019, a warranty reserve in the amount of $1.8 million was established to offset any future warranty claims.

Commitments and Contingencies

Legal

On January 11, 2018, Logan Mullins, acting on behalf of himself and a putative class of persons who purchased or otherwise acquired the Company's securities between April 22, 2015 and January 8, 2018, filed a class action complaint in the U.S. District Court for the Northern District of Texas (the "Court") against the Company and two of its executive officers, Thomas E. Ferguson and Paul W. Fehlman. Logan Mullins v. AZZ, Inc., et al., Case No. 4:18-cv-00025-Y. The complaint alleged, among other things, that the Company's SEC filings contained statements that were rendered materially false and misleading by the Company's alleged failure to properly recognize revenue related to certain contracts in its Energy Segment in purported violation of (1) Section 10(b) of the Exchange Act and Rule 10b-5 and (2) Section 20(a) of the Exchange Act. After the Court appointed a Lead Plaintiff in the case, but before the Company was required to respond to the lawsuit, the Plaintiff voluntarily sought dismissal of the complaint without prejudice. On January 16, 2019, the Court dismissed the case without prejudice. No other parties have sought to reopen the case; therefore, the legal matter is no longer pending.

In addition, the Company and its subsidiaries are named defendants in various routine lawsuits incidental to our business. These proceedings include labor and employment claims, use of the Company’s intellectual property, worker’s compensation and various environmental matters, all arising in the normal course of business. Although the outcome of these lawsuits or other proceedings cannot be predicted with certainty, and the amount of any potential liability that could arise with respect to such lawsuits or other matters cannot be predicted at this time, management, after consultation with legal counsel, does not expect liabilities, if any, from these claims or proceedings, either individually or in the aggregate, to have a material effect on the Company’s financial position, results of operations or cash flows.

Commodity pricing

We have no contracted commitments for any commodities including steel, aluminum, natural gas, cooper, zinc, nickel based alloys, except for those entered into under the normal course of business.

Other

At February 28, 2019, the Company had outstanding letters of credit in the amount of $44.3 million. These letters of credit are issued for a number of reasons, but are most commonly issued in lieu of customer retention withholding payments covering warranty or performance periods. In addition, as of February 28, 2019, a warranty reserve in the amount of $1.8 million was established to offset any future warranty claims.