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General
 6 Months Ended
Jun. 30, 2024
Accounting Policies [Abstract]  
General General
The accompanying unaudited interim consolidated financial statements of Century Aluminum Company should be read in conjunction with the audited consolidated financial statements for the year ended December 31, 2023. In management’s opinion, the unaudited interim consolidated financial statements reflect all adjustments, which are of a normal and recurring nature, that are necessary for a fair presentation of financial results for the interim periods presented. Operating results for the first six months of 2024 are not necessarily indicative of the results that may be expected for the year ending December 31, 2024. Throughout this Form 10-Q, and unless expressly stated otherwise or as the context otherwise requires, "Century Aluminum", "Century", "the Company", "we", "us", "our" and "ours" refer to Century Aluminum Company and its consolidated subsidiaries.
Our consolidated financial statements include the consolidated results of the Jamalco joint venture ("Jamalco"), an unincorporated joint venture between General Alumina Jamaica Limited ("GAJL"), an indirect, wholly-owned subsidiary of the Company, and Clarendon Alumina Production Limited ("CAP"). CAP's interest in the joint venture is reflected as noncontrolling interest on the accompanying Consolidated Balance Sheets.
Recently Issued Accounting Standards
In November 2023, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update No. ("ASU") 2023-07, "Improvements to Reportable Segment Disclosures." ("ASU 2023-07"). Among other changes, the ASU requires disclosure of significant segment expenses and extends certain annual disclosures to interim periods. The amendments in this ASU are effective for the Company beginning with its annual financial statements for the year ending December 31, 2024. Early adoption is permitted. The Company is currently evaluating the requirements of ASU 2023-07.
In December 2023, the FASB issued ASU No. 2023-09 ("ASU 2023-09"), Improvements to Income Tax Disclosures. The guidance is intended to improve income tax disclosure requirements by requiring (i) consistent categories and greater disaggregation of information in the rate reconciliation and (ii) the disaggregation of income taxes paid by jurisdiction. The ASU is effective for the Company beginning with its annual financial statements for the year ending December 31, 2025, with early adoption permitted, and is required to be applied prospectively with the option of retrospective application. The Company is currently evaluating the requirements of ASU 2023-09.