Document and Entity Information - USD ($) $ in Billions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
May 15, 2026 |
Sep. 30, 2025 |
|
| Document Information [Line Items] | |||
| Document Type | 10-K | ||
| Amendment Flag | false | ||
| Document Period End Date | Mar. 31, 2026 | ||
| Document Fiscal Year Focus | 2026 | ||
| Document Fiscal Period Focus | FY | ||
| Entity Registrant Name | EAGLE MATERIALS INC. | ||
| Entity Central Index Key | 0000918646 | ||
| Current Fiscal Year End Date | --03-31 | ||
| Entity Well-known Seasoned Issuer | Yes | ||
| Entity Current Reporting Status | Yes | ||
| Entity Voluntary Filers | No | ||
| Entity Interactive Data Current | Yes | ||
| Entity Filer Category | Large Accelerated Filer | ||
| Entity Small Business | false | ||
| Entity Emerging Growth Company | false | ||
| ICFR Auditor Attestation Flag | true | ||
| Entity Shell Company | false | ||
| Entity Common Stock, Shares Outstanding | 30,948,147 | ||
| Entity Public Float | $ 7.7 | ||
| Entity File Number | 1-12984 | ||
| Entity Incorporation, State or Country Code | DE | ||
| Entity Tax Identification Number | 75-2520779 | ||
| Entity Address, Address Line One | 5960 Berkshire Lane | ||
| Entity Address, Address Line Two | Suite 900 | ||
| Entity Address, City or Town | Dallas | ||
| Entity Address, State or Province | TX | ||
| Entity Address, Postal Zip Code | 75225 | ||
| City Area Code | 214 | ||
| Local Phone Number | 432-2000 | ||
| Document Annual Report | true | ||
| Document Transition Report | false | ||
| Document Financial Statement Error Correction [Flag] | false | ||
| Documents Incorporated by Reference | Portions of the Proxy Statement for the Annual Meeting of Stockholders of Eagle Materials Inc. to be held on July 30, 2026 are incorporated by reference in Part III of this Report. |
||
| Auditor Firm ID | 42 | ||
| Auditor Location | Dallas, Texas | ||
| Auditor Name | Ernst & Young LLP | ||
| Auditor Opinion [Text Block] | Opinion on the Financial Statements We have audited the accompanying consolidated balance sheets of Eagle Materials Inc. and subsidiaries (the Company) as of March 31, 2026 and 2025, the related consolidated statements of earnings, comprehensive earnings, stockholders' equity and cash flows for each of the three years in the period ended March 31, 2026, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at March 31, 2026 and 2025, and the results of its operations and its cash flows for each of the three years in the period ended March 31, 2026, in conformity with U.S. generally accepted accounting principles. We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of March 31, 2026, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework), and our report dated May 19, 2026 expressed an unqualified opinion thereon. Basis for Opinion These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB. We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion. |
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| Common Stock [Member] | |||
| Document Information [Line Items] | |||
| Trading Symbol | EXP | ||
| Title of 12(b) Security | Common Stock (par value $.01 per share) | ||
| Security Exchange Name | NYSE | ||
| NASDAQ OMX BX [Member] | |||
| Document Information [Line Items] | |||
| Trading Symbol | EXP | ||
| Title of 12(b) Security | Common Stock (par value $.01 per share) | ||
| Security Exchange Name | BX |