{"cik":811596,"taxonomy":"us-gaap","tag":"LongTermDebt","label":"Long-term Debt","description":"Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.","entityName":"KAISER ALUMINUM CORPORATION","units":{"USD":[{"end":"2010-12-31","val":13100000,"accn":"0000950123-11-071490","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-02"},{"end":"2010-12-31","val":13100000,"accn":"0000811596-12-000062","fy":2011,"fp":"FY","form":"8-K","filed":"2012-07-23","frame":"CY2010Q4I"},{"end":"2010-12-31","val":13100000,"accn":"0000811596-12-000047","fy":2011,"fp":"FY","form":"8-K","filed":"2012-05-14"},{"end":"2010-12-31","val":13100000,"accn":"0000811596-12-000020","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-29"},{"end":"2010-12-31","val":13100000,"accn":"0000811596-11-000015","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-10-27"},{"end":"2011-06-30","val":12400000,"accn":"0000950123-11-071490","fy":2011,"fp":"Q2","form":"10-Q","filed":"2011-08-02","frame":"CY2011Q2I"},{"end":"2011-09-30","val":5000000,"accn":"0000811596-11-000015","fy":2011,"fp":"Q3","form":"10-Q","filed":"2011-10-27","frame":"CY2011Q3I"},{"end":"2011-12-31","val":4700000,"accn":"0000811596-12-000062","fy":2011,"fp":"FY","form":"8-K","filed":"2012-07-23","frame":"CY2011Q4I"},{"end":"2011-12-31","val":4700000,"accn":"0000811596-12-000059","fy":2012,"fp":"Q1","form":"8-K","filed":"2012-07-23"},{"end":"2011-12-31","val":4700000,"accn":"0000811596-12-000047","fy":2011,"fp":"FY","form":"8-K","filed":"2012-05-14"},{"end":"2011-12-31","val":4700000,"accn":"0000811596-12-000031","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-04-26"},{"end":"2011-12-31","val":4700000,"accn":"0000811596-12-000020","fy":2011,"fp":"FY","form":"10-K","filed":"2012-02-29"},{"end":"2012-03-31","val":4700000,"accn":"0000811596-12-000059","fy":2012,"fp":"Q1","form":"8-K","filed":"2012-07-23","frame":"CY2012Q1I"},{"end":"2012-03-31","val":4700000,"accn":"0000811596-12-000031","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-04-26"}]}}