v2.4.0.6
Document and Entity Information (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2010
Feb. 16, 2011
Document And Entity Information Abstract    
Entity Registrant Name KAISER ALUMINUM CORPORATION  
Entity Central Index Key 0000811596  
Document Type 10-K  
Document Period End Date Dec. 31, 2010  
Amendment Flag false  
Document Fiscal Year Focus 2010  
Document Fiscal Period Focus Q4  
Current Fiscal Year End Date --12-31  
Entity Well Known Seasoned Issuer Yes  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Filer Category Large Accelerated Filer  
Entity Public Float $ 0.5  
Entity Common Stock, Shares Outstanding   19,214,451