| Cover Page - USD ($) $ in Millions | 12 Months Ended | ||
| Dec. 31, 2021 | Mar. 25, 2022 | Jun. 30, 2021 | |
| Document Information [Line Items] | |||
| Document Type | 10-K/A | ||
| Amendment Flag | true | ||
| Document Period End Date | Dec. 31, 2021 | ||
| Document Fiscal Year Focus | 2021 | ||
| Document Fiscal Period Focus | FY | ||
| Entity Registrant Name | LSB INDUSTRIES, INC. | ||
| Entity Central Index Key | 0000060714 | ||
| Current Fiscal Year End Date | --12-31 | ||
| Entity Well-known Seasoned Issuer | No | ||
| Entity Current Reporting Status | Yes | ||
| Entity Voluntary Filers | No | ||
| Entity Filer Category | Accelerated Filer | ||
| Entity Small Business | true | ||
| Entity Emerging Growth Company | false | ||
| ICFR Auditor Attestation Flag | true | ||
| Entity Shell Company | false | ||
| Entity Common Stock, Shares Outstanding | 89,564,162 | ||
| Entity Public Float | $ 141 | ||
| Entity Interactive Data Current | Yes | ||
| Entity File Number | 1-7677 | ||
| Entity Incorporation, State or Country Code | DE | ||
| Entity Tax Identification Number | 73-1015226 | ||
| Entity Address, Address Line One | 3503 NW 63rd Street | ||
| Entity Address, Address Line Two | Suite 500 | ||
| Entity Address, City or Town | Oklahoma City | ||
| Entity Address, State or Province | OK | ||
| Entity Address, Postal Zip Code | 73116 | ||
| City Area Code | 405 | ||
| Local Phone Number | 235-4546 | ||
| Document Annual Report | true | ||
| Document Transition Report | false | ||
| Auditor Name | Ernst & Young LLP | ||
| Auditor Firm ID | 42 | ||
| Auditor Location | Oklahoma City, OK, United States | ||
| Amendment Description | LSB Industries, Inc. (the “Company”) is filing this Amendment No. 1 (this “Amendment No. 1”) to its Annual Report on Form 10-K for the fiscal year ended December 31, 2021, which was originally filed with the Securities and Exchange Commission (“SEC”) on February 24, 2022 (the “Original Form 10-K”) as an exhibits-only filing that updates, amends and supplements Part IV, Item 15 of the Original Form 10-K for the purpose of filing certain exhibits that were inadvertently omitted from the Original Form 10-K and removing certain exhibits that are no longer required to be included therein that were inadvertently included in the Original Form 10-K. In addition, as required by Rule 12b-15 under the Securities and Exchange Act of 1934, as amended, this Amendment No. 1 includes new Exhibits 31.1 and 31.2, certifications of our Principal Executive Officer and Principal Financial Officer, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, and new Exhibits 32.1 and 32.2, certifications of our Principal Executive Officer and Principal Financial Officer, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. This Amendment No.1 does not affect any other parts of, or exhibits to, the Original Form 10-K, and those unaffected parts or exhibits are not included in this Amendment No. 1. Except as expressly stated in this Amendment No. 1, the Original Form 10-K continues to speak as of the date of the original filing of the Original Form 10-K, and the Company has not updated the disclosure contained in this Amendment No. 1 to reflect events that have occurred since the filing of the Original Form 10-K. Accordingly, this Amendment No. 1 must be read in conjunction with the Company’s other filings made with the SEC subsequent to the filing of the Original Form 10-K, including amendments to those filings, if any. | ||
| Common Stock [Member] | |||
| Document Information [Line Items] | |||
| Trading Symbol | LXU | ||
| Title of 12(b) Security | Common Stock, Par Value $.10 | ||
| Security Exchange Name | NYSE | ||
| Preferred Stock [Member] | |||
| Document Information [Line Items] | |||
| No Trading Symbol Flag | true | ||
| Title of 12(b) Security | Preferred Stock Purchase Rights | ||
| Security Exchange Name | NYSE |
