Cover - USD ($) $ in Billions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Feb. 10, 2026 |
Jun. 30, 2025 |
|
| Document Information [Line Items] | |||
| Document Type | 10-K | ||
| Document Annual Report | true | ||
| Document Period End Date | Dec. 31, 2025 | ||
| Current Fiscal Year End Date | --12-31 | ||
| Document Transition Report | false | ||
| Entity File Number | 001-38061 | ||
| Entity Registrant Name | Warrior Met Coal, Inc. | ||
| Entity Incorporation, State or Country Code | DE | ||
| Entity Tax Identification Number | 81-0706839 | ||
| Entity Address, Address Line One | 16243 Highway 216 | ||
| Entity Address, City or Town | Brookwood | ||
| Entity Address, State or Province | AL | ||
| Entity Address, Postal Zip Code | 35444 | ||
| City Area Code | 205 | ||
| Local Phone Number | 554-6150 | ||
| Entity Well-known Seasoned Issuer | Yes | ||
| 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 | ||
| ICFR Auditor Attestation Flag | true | ||
| Document Financial Statement Error Correction [Flag] | false | ||
| Entity Shell Company | false | ||
| Entity Public Float | $ 2.5 | ||
| Entity Common Stock, Shares Outstanding (in shares) | 52,570,156 | ||
| Documents Incorporated by Reference | Portions of the registrant’s definitive proxy statement for its 2025 Annual Meeting of Stockholders, which will be filed with the Securities and Exchange Commission within 120 days of December 31, 2025, are incorporated by reference into Part III of this report for the year ended December 31, 2025. |
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| Auditor Opinion [Text Block] | Opinion on the Financial Statements We have audited the accompanying consolidated balance sheets of Warrior Met Coal, Inc. (the Company) as of December 31, 2025 and 2024, the related consolidated statements of operations, changes in equity, and cash flows for each of the three years in the period ended December 31, 2025, 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 December 31, 2025 and 2024, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2025, 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 December 31, 2025, 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 February 12, 2026 expressed an unqualified opinion thereon. |
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| Auditor Name | Ernst & Young LLP | ||
| Auditor Location | Birmingham, Alabama | ||
| Auditor Firm ID | 42 | ||
| Entity Central Index key | 0001691303 | ||
| Document Fiscal Year Focus | 2025 | ||
| Amendment Flag | false | ||
| Document Fiscal Period Focus | FY | ||
| Common Stock | |||
| Document Information [Line Items] | |||
| Title of 12(b) Security | Common Stock, par value $0.01 per share | ||
| Trading Symbol | HCC | ||
| Security Exchange Name | NYSE | ||
| Preferred Stock | |||
| Document Information [Line Items] | |||
| Title of 12(b) Security | Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share | ||
| Security Exchange Name | NYSE | ||
| No Trading Symbol Flag | true |