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Cover
May 02, 2023
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date May 02, 2023
Entity File Number 001-34474
Entity Registrant Name Century Aluminum Company
Entity Central Index Key 0000949157
Entity Tax Identification Number 13-3070826
Entity Incorporation, State or Country Code DE
Entity Address, Address Line One One South Wacker Drive
Entity Address, Address Line Two Suite 1000
Entity Address, City or Town Chicago
Entity Address, State or Province IL
Entity Address, Postal Zip Code 60606
City Area Code 312
Local Phone Number 696-3101
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, $0.01 par value per share
Trading Symbol CENX
Security Exchange Name NASDAQ
Entity Emerging Growth Company false