v2.3.0.15

Employee Incentive Plans, STI Compensation Expense Table (Details) (USD $) In Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2011 | Sep. 30, 2010 | Sep. 30, 2011 | Sep. 30, 2010
Compensation charges associated with STI Plans |  |  |  |
Total costs recorded in connection with STI plans | $ 1.9 | $ 1.7 | $ 6.4 | $ 5.8
Cost of products sold [Member] |  |  |  |
Compensation charges associated with STI Plans |  |  |  |
Total costs recorded in connection with STI plans | 0.6 | 0.8 | 2.5 | 2.1
Selling, administrative, research and development and general [Member] |  |  |  |
Compensation charges associated with STI Plans |  |  |  |
Total costs recorded in connection with STI plans | 1.3 | 0.9 | 3.9 | 3.7
Fabricated Products [Member] |  |  |  |
Compensation charges associated with STI Plans |  |  |  |
Total costs recorded in connection with STI plans | 1.3 | 1.3 | 4.7 | 3.9
All Other [Member] |  |  |  |
Compensation charges associated with STI Plans |  |  |  |
Total costs recorded in connection with STI plans | $ 0.6 | $ 0.4 | $ 1.7 | $ 1.9

X
- Definition Incentive compensation plan. + Details
Name: | kalu_IncentiveCompensationPlanAbstract
Namespace Prefix: | kalu
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Short Term Incentive Compensation Expense. + Details
Name: | kalu_ShortTermIncentiveCompensationExpense
Namespace Prefix: | kalu
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration