XML 32 R77.htm IDEA: XBRL DOCUMENT v2.4.1.9
Segment and Geographical Area Information, Textuals (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Segment Reporting Information      
Environmental expense $ 0.8us-gaap_AccrualForEnvironmentalLossContingenciesPeriodIncreaseDecrease $ 4.5us-gaap_AccrualForEnvironmentalLossContingenciesPeriodIncreaseDecrease $ 1.2us-gaap_AccrualForEnvironmentalLossContingenciesPeriodIncreaseDecrease
Asset impairment charge 1.5us-gaap_AssetImpairmentCharges 0us-gaap_AssetImpairmentCharges 4.4us-gaap_AssetImpairmentCharges
Unrealized gains (losses) on derivatives (6.8)us-gaap_UnrealizedGainLossOnDerivatives 3.9us-gaap_UnrealizedGainLossOnDerivatives 16.0us-gaap_UnrealizedGainLossOnDerivatives
Non-cash defined benefit net periodic benefit income (23.5)us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost (22.0)us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost (11.5)us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost
Fabricated Products      
Segment Reporting Information      
Environmental expense 1.2us-gaap_AccrualForEnvironmentalLossContingenciesPeriodIncreaseDecrease
/ us-gaap_StatementBusinessSegmentsAxis
= kalu_FabricatedProductsMember
4.0us-gaap_AccrualForEnvironmentalLossContingenciesPeriodIncreaseDecrease
/ us-gaap_StatementBusinessSegmentsAxis
= kalu_FabricatedProductsMember
1.1us-gaap_AccrualForEnvironmentalLossContingenciesPeriodIncreaseDecrease
/ us-gaap_StatementBusinessSegmentsAxis
= kalu_FabricatedProductsMember
Asset impairment charge 1.5us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= kalu_FabricatedProductsMember
  4.4us-gaap_AssetImpairmentCharges
/ us-gaap_StatementBusinessSegmentsAxis
= kalu_FabricatedProductsMember
Unrealized gains (losses) on derivatives (10.4)us-gaap_UnrealizedGainLossOnDerivatives
/ us-gaap_StatementBusinessSegmentsAxis
= kalu_FabricatedProductsMember
0.7us-gaap_UnrealizedGainLossOnDerivatives
/ us-gaap_StatementBusinessSegmentsAxis
= kalu_FabricatedProductsMember
15.2us-gaap_UnrealizedGainLossOnDerivatives
/ us-gaap_StatementBusinessSegmentsAxis
= kalu_FabricatedProductsMember
United States      
Segment Reporting Information      
Number of production facilities 11kalu_NumberOfProductionFacilities
/ us-gaap_StatementGeographicalAxis
= country_US
   
Canada      
Segment Reporting Information      
Number of production facilities 1kalu_NumberOfProductionFacilities
/ us-gaap_StatementGeographicalAxis
= country_CA
   
VEBAs | All Other      
Segment Reporting Information      
Non-cash defined benefit net periodic benefit income $ (23.7)us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= kalu_VebasMember
/ us-gaap_StatementBusinessSegmentsAxis
= kalu_AllOtherMember
[1] $ (22.5)us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= kalu_VebasMember
/ us-gaap_StatementBusinessSegmentsAxis
= kalu_AllOtherMember
[1] $ (11.9)us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= kalu_VebasMember
/ us-gaap_StatementBusinessSegmentsAxis
= kalu_AllOtherMember
[1]
Customer Concentration Risk | Net sales | Largest Customer | Fabricated Products      
Segment Reporting Information      
Concentration risk, percentage 22.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= kalu_LargestCustomerMember
/ us-gaap_StatementBusinessSegmentsAxis
= kalu_FabricatedProductsMember
23.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= kalu_LargestCustomerMember
/ us-gaap_StatementBusinessSegmentsAxis
= kalu_FabricatedProductsMember
22.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= kalu_LargestCustomerMember
/ us-gaap_StatementBusinessSegmentsAxis
= kalu_FabricatedProductsMember
Customer Concentration Risk | Net sales | Second Largest Customer | Fabricated Products      
Segment Reporting Information      
Concentration risk, percentage 10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= kalu_SecondLargestCustomerMember
/ us-gaap_StatementBusinessSegmentsAxis
= kalu_FabricatedProductsMember
12.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= kalu_SecondLargestCustomerMember
/ us-gaap_StatementBusinessSegmentsAxis
= kalu_FabricatedProductsMember
 
Customer Concentration Risk | Trade Receivables | Largest Customer      
Segment Reporting Information      
Concentration risk, percentage 10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= kalu_LargestCustomerMember
12.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= kalu_LargestCustomerMember
 
Customer Concentration Risk | Trade Receivables | Second Largest Customer      
Segment Reporting Information      
Concentration risk, percentage 12.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= kalu_SecondLargestCustomerMember
14.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= kalu_SecondLargestCustomerMember
 
[1] Included within the Statements of Consolidated Income as Net periodic pension benefit income relating to VEBAs.