$KALU
KAISER ALUMINUM CORP Stock $kalu

$kalu Overview Financials Valuation SEC Filings Company Website

2013 Q2 Form 10-Q Financial Statement

#000081159613000029 Filed on April 24, 2013

Income Statement

Concept	2013 Q2	2013 Q1	2012 Q1
Revenue	$328.9M	$337.4M	$365.4M
YoY Change	-4.72%	-7.66%	13.27%
Cost Of Revenue	$261.5M	$263.6M	$298.1M
YoY Change	-8.05%	-11.57%	4.52%
Gross Profit	$63.20M	$73.10M	$70.40M
YoY Change	4.12%	3.84%	68.82%
Gross Profit Margin	19.22%	21.67%	19.27%
Selling, General & Admin	$16.10M	$16.10M	$17.90M
YoY Change	11.81%	-10.06%	14.74%
% of Gross Profit	25.47%	22.02%	25.43%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$7.000M	$7.000M	$6.300M
YoY Change	6.06%	11.11%	0.0%
% of Gross Profit	11.08%	9.58%	8.95%
Operating Expenses	$23.10M	$23.10M	$24.20M
YoY Change	9.48%	-4.55%	10.5%
Operating Profit	$40.10M	$50.00M	$46.20M
YoY Change	1.26%	8.23%	133.33%
Interest Expense	$9.000M	$9.300M	$4.100M
YoY Change	38.46%	126.83%	-8.89%
% of Operating Profit	22.44%	18.6%	8.87%
Other Income/Expense, Net	-$800.0K	$1.000M	$700.0K
YoY Change	-172.73%	42.86%	-58.82%
Pretax Income	$30.30M	$41.70M	$42.80M
YoY Change	-11.4%	-2.57%	151.76%
Income Tax	$11.70M	$8.200M	$16.30M
% Of Pretax Income	38.61%	19.66%	38.08%
Net Earnings	$18.60M	$33.50M	$26.50M
YoY Change	-11.43%	26.42%	145.37%
Net Earnings / Revenue	5.66%	9.93%	7.25%
Basic Earnings Per Share	$0.99	$1.75	$1.39
Diluted Earnings Per Share	$0.98	$1.73	$1.38
COMMON SHARES
Basic Shares Outstanding	18.74M shares	19.14M shares	19.06M shares
Diluted Shares Outstanding	18.95M shares	19.37M shares	19.16M shares

Balance Sheet

Concept	2013 Q2	2013 Q1	2012 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$329.0M	$333.6M	$77.30M
YoY Change	3.52%	331.57%	38.28%
Cash & Equivalents	$281.7M	$248.0M	$77.30M
Short-Term Investments	$250.9M	$250.7M
Other Short-Term Assets	$70.10M	$71.00M	$75.30M
YoY Change	-6.16%	-5.71%	2181.82%
Inventory	$202.9M	$199.3M	$198.2M
Prepaid Expenses	$4.000M	$3.900M	$5.900M
Receivables	$122.7M	$141.8M	$130.1M
Other Receivables	$11.60M	$11.80M	$1.300M
Total Short-Term Assets	$736.3M	$757.5M	$482.2M
YoY Change	1.91%	57.09%	11.34%
LONG-TERM ASSETS
Property, Plant & Equipment	$398.3M	$386.4M	$370.8M
YoY Change	6.78%	4.21%	3.55%
Goodwill	$37.20M	$37.20M	$37.20M
YoY Change	0.0%	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments	$6.000M	$5.800M	$5.100M
YoY Change	9.09%	13.73%	8.51%
Other Assets	$78.50M	$88.80M	$63.00M
YoY Change	6.37%	40.95%	-14.86%
Total Long-Term Assets	$1.003B	$1.007B	$908.1M
YoY Change	6.87%	10.88%	-3.16%
TOTAL ASSETS
Total Short-Term Assets	$736.3M	$757.5M	$482.2M
Total Long-Term Assets	$1.003B	$1.007B	$908.1M
Total Assets	$1.740B	$1.764B	$1.390B
YoY Change	4.71%	26.91%	1.42%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$73.20M	$73.20M	$65.40M
YoY Change	10.08%	11.93%	2.67%
Accrued Expenses	$58.60M	$58.30M	$44.50M
YoY Change	15.81%	31.01%	-9.18%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$300.0K	$200.0K	$1.700M
YoY Change		-88.24%	-64.58%
Total Short-Term Liabilities	$147.1M	$157.2M	$163.7M
YoY Change	-9.42%	-3.97%	-0.43%
LONG-TERM LIABILITIES
Long-Term Debt	$384.3M	$382.3M	$3.000M
YoY Change	2.04%	12643.33%	-62.03%
Other Long-Term Liabilities	$127.0M	$135.2M	$116.1M
YoY Change	6.99%	16.45%	-10.76%
Total Long-Term Liabilities	$511.3M	$517.5M	$119.1M
YoY Change	3.23%	334.51%	-13.7%
TOTAL LIABILITIES
Total Short-Term Liabilities	$147.1M	$157.2M	$163.7M
Total Long-Term Liabilities	$511.3M	$517.5M	$119.1M
Total Liabilities	$662.9M	$679.6M	$453.0M
YoY Change	-2.2%	50.02%	1.71%
SHAREHOLDERS EQUITY
Retained Earnings	$191.8M	$179.0M	$106.5M
YoY Change	56.44%	68.08%	22.84%
Common Stock	$1.021B	$1.019B	$1.008B
YoY Change	0.55%	1.09%	1.93%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$112.8M	$88.50M	$72.30M
YoY Change	56.02%	22.41%	0.0%
Treasury Stock Shares	2.379M shares	1.984M shares	1.725M shares
Shareholders Equity	$1.077B	$1.085B	$937.3M
YoY Change
Total Liabilities & Shareholders Equity	$1.740B	$1.764B	$1.390B
YoY Change	4.71%	26.91%	1.42%

Cashflow Statement

Concept	2013 Q2	2013 Q1	2012 Q1
OPERATING ACTIVITIES
Net Income	$18.60M	$33.50M	$26.50M
YoY Change	-11.43%	26.42%	145.37%
Depreciation, Depletion And Amortization	$7.000M	$7.000M	$6.300M
YoY Change	6.06%	11.11%	0.0%
Cash From Operating Activities	$42.60M	$6.300M	$35.00M
YoY Change	7.3%	-82.0%	121.52%
INVESTING ACTIVITIES
Capital Expenditures	-$16.70M	-$9.300M	-$9.000M
YoY Change	111.39%	3.33%	-89.93%
Acquisitions			$0.00
YoY Change			-100.0%
Other Investing Activities	$38.60M	-$400.0K	$7.200M
YoY Change	-12966.67%	-105.56%
Cash From Investing Activities	$21.90M	-$9.700M	-$1.800M
YoY Change	-367.07%	438.89%	-97.99%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$14.70M	$0.00
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-30.80M	-$22.00M	-$5.700M
YoY Change	-114.74%	285.96%	-6.56%
NET CHANGE
Cash From Operating Activities	42.60M	$6.300M	$35.00M
Cash From Investing Activities	21.90M	-$9.700M	-$1.800M
Cash From Financing Activities	-30.80M	-$22.00M	-$5.700M
Net Change In Cash	33.70M	-$25.40M	$27.50M
YoY Change	-85.99%	-192.36%	-134.5%
FREE CASH FLOW
Cash From Operating Activities	$42.60M	$6.300M	$35.00M
Capital Expenditures	-$16.70M	-$9.300M	-$9.000M
Free Cash Flow	$59.30M	$15.60M	$44.00M
YoY Change	24.58%	-64.55%	-58.17%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2013Q1	us-gaap	Accounts Payable Current AccountsPayableCurrent	73200000	USD
CY2012Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	62500000	USD
CY2013Q1	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	142600000	USD
CY2012Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	124600000	USD
CY2012Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	123800000	USD
CY2013Q1	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	141800000	USD
CY2013Q1	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	22000000	USD
CY2012Q4	us-gaap	Accrued Environmental Loss Contingencies Current AccruedEnvironmentalLossContingenciesCurrent	3000000	USD
CY2013Q1	us-gaap	Accrued Environmental Loss Contingencies Current AccruedEnvironmentalLossContingenciesCurrent	4700000	USD
CY2013Q1	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	17300000	USD
CY2012Q4	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	18700000	USD
CY2012Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	7400000	USD
CY2013Q1	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	4500000	USD
CY2012Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	111400000	USD
CY2013Q1	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	118000000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-26000000	USD
CY2013Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-24800000	USD
CY2012Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1017700000	USD
CY2013Q1	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1018900000	USD
CY2013Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2600000	USD
CY2013Q1	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	800000	USD
CY2013Q1	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2600000	USD
CY2012Q1	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2500000	USD
CY2012Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	800000	USD
CY2013Q1	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	800000	USD
CY2013Q1	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	2700000	USD
CY2012Q1	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	2300000	USD
CY2013Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	400000	USD
CY2012Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	400000	USD
CY2012Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	3800000	USD
CY2013Q1	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	3900000	USD
CY2012Q4	us-gaap	Assets Assets	1752500000	USD
CY2013Q1	us-gaap	Assets Assets	1764400000	USD
CY2012Q4	us-gaap	Assets Current AssetsCurrent	741700000	USD
CY2013Q1	us-gaap	Assets Current AssetsCurrent	757500000	USD
CY2013Q1	us-gaap	Available For Sale Securities Current AvailableForSaleSecuritiesCurrent	85600000	USD
CY2012Q4	us-gaap	Available For Sale Securities Current AvailableForSaleSecuritiesCurrent	85000000	USD
CY2012Q1	us-gaap	Available For Sale Securities Gross Realized Gain Loss Net AvailableForSaleSecuritiesGrossRealizedGainLossNet	0	USD
CY2013Q1	us-gaap	Available For Sale Securities Gross Realized Gain Loss Net AvailableForSaleSecuritiesGrossRealizedGainLossNet	500000	USD
CY2012Q4	us-gaap	Available For Sale Securities Noncurrent AvailableForSaleSecuritiesNoncurrent	5600000	USD
CY2013Q1	us-gaap	Available For Sale Securities Noncurrent AvailableForSaleSecuritiesNoncurrent	5800000	USD
CY2013Q1	us-gaap	Bank Overdrafts BankOverdrafts	5700000	USD
CY2012Q4	us-gaap	Bank Overdrafts BankOverdrafts	4700000	USD
CY2012Q4	us-gaap	Billed Contract Receivables BilledContractReceivables	124400000	USD
CY2013Q1	us-gaap	Billed Contract Receivables BilledContractReceivables	140100000	USD
CY2012Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	50900000	USD
CY2013Q1	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	51700000	USD
CY2013Q1	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	2700000	USD
CY2012Q1	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	1800000	USD
CY2012Q4	us-gaap	Capital Lease Obligations Current CapitalLeaseObligationsCurrent	100000	USD
CY2013Q1	us-gaap	Capital Lease Obligations Current CapitalLeaseObligationsCurrent	200000	USD
CY2012Q1	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	0	USD
CY2013Q1	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	100000	USD
CY2013Q1	us-gaap	Capital Lease Obligations Noncurrent CapitalLeaseObligationsNoncurrent	200000	USD
CY2012Q4	us-gaap	Capital Lease Obligations Noncurrent CapitalLeaseObligationsNoncurrent	200000	USD
CY2013Q1	us-gaap	Cash Cash	82900000	USD
CY2012Q4	us-gaap	Cash Cash	107900000	USD
CY2013Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	248000000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	273400000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	49800000	USD
CY2012Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	77300000	USD
CY2013Q1	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-25400000	USD
CY2012Q1	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	27500000	USD
CY2013Q1	us-gaap	Commercial Paper At Carrying Value CommercialPaperAtCarryingValue	165100000	USD
CY2012Q4	us-gaap	Commercial Paper At Carrying Value CommercialPaperAtCarryingValue	165500000	USD
CY2012Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2013Q1	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2013Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.30
CY2012Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.25
CY2013Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.30
CY2013Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2012Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2013Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	90000000	shares
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	90000000	shares
CY2013Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	21093816	shares
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	21037841	shares
CY2013Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	19109614	shares
CY2012Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	19313235	shares
CY2013Q1	us-gaap	Common Stock Value CommonStockValue	200000	USD
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	200000	USD
CY2012Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	27600000	USD
CY2013Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	34700000	USD
CY2012Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	20800000	USD
CY2013Q1	us-gaap	Construction In Progress Gross ConstructionInProgressGross	25600000	USD
CY2012Q4	us-gaap	Convertible Debt ConvertibleDebt	155300000	USD
CY2013Q1	us-gaap	Convertible Debt ConvertibleDebt	157300000	USD
CY2012Q1	us-gaap	Cost Of Goods Sold CostOfGoodsSold	298100000	USD
CY2013Q1	us-gaap	Cost Of Goods Sold CostOfGoodsSold	263600000	USD
CY2012Q1	us-gaap	Costs And Expenses CostsAndExpenses	319200000	USD
CY2013Q1	us-gaap	Costs And Expenses CostsAndExpenses	287400000	USD
CY2013Q1	us-gaap	Debt Instrument Convertible Conversion Price1 DebtInstrumentConvertibleConversionPrice1	48.24
CY2013Q2	us-gaap	Debt Instrument Convertible Conversion Price1 DebtInstrumentConvertibleConversionPrice1	48.19
CY2013Q1	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	225000000	USD
CY2012Q4	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	225000000	USD
CY2012Q1	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	400000	USD
CY2013Q1	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	400000	USD
CY2013Q1	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	6200000	USD
CY2012Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	5800000	USD
CY2013Q1	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	11000000	USD
CY2012Q4	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	11700000	USD
CY2013Q1	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	15300000	USD
CY2012Q1	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	16000000	USD
CY2012Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	6700000	USD
CY2013Q1	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	4600000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	59500000	USD
CY2013Q1	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	59500000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	102000000	USD
CY2013Q1	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	87000000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	136900000	USD
CY2013Q1	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	139500000	USD
CY2013Q1	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-5600000	USD
CY2012Q1	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-3000000	USD
CY2012Q1	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	3400000	USD
CY2013Q1	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	4000000	USD
CY2012Q1	us-gaap	Depreciation Depreciation	5900000	USD
CY2013Q1	us-gaap	Depreciation Depreciation	6600000	USD
CY2013Q1	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	7000000	USD
CY2012Q1	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	6300000	USD
CY2013Q1	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	0	USD
CY2012Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	0	USD
CY2013Q1	us-gaap	Derivative Asset Fair Value Net DerivativeAssetFairValueNet	63400000	USD
CY2012Q4	us-gaap	Derivative Asset Fair Value Net DerivativeAssetFairValueNet	58500000	USD
CY2013Q1	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	1500000	USD
CY2012Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	3000000	USD
CY2012Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	55500000	USD
CY2013Q1	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	61800000	USD
CY2013Q1	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	0	USD
CY2013Q1	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	3100000	USD
CY2012Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	3100000	USD
CY2013Q1	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	68800000	USD
CY2012Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	63500000	USD
CY2013Q1	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	0	USD
CY2012Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	0	USD
CY2013Q1	us-gaap	Derivative Liability Fair Value Net1 DerivativeLiabilityFairValueNet1	72000000	USD
CY2012Q4	us-gaap	Derivative Liability Fair Value Net1 DerivativeLiabilityFairValueNet1	66700000	USD
CY2013Q1	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	2800000	USD
CY2012Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	0	USD
CY2013Q1	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	0	USD
CY2012Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	0	USD
CY2013Q1	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	63400000	USD
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	58500000	USD
CY2013Q1	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	2000000	USD
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	2600000	USD
CY2013Q1	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	61400000	USD
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	55900000	USD
CY2013Q1	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	72000000	USD
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	66700000	USD
CY2013Q1	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	2000000	USD
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	2600000	USD
CY2013Q1	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	70000000	USD
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	64100000	USD
CY2013Q1	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-300000	USD
CY2012Q1	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	3600000	USD
CY2012Q1	us-gaap	Derivative Instruments Gain Loss Recognized In Income Net DerivativeInstrumentsGainLossRecognizedInIncomeNet	-2700000	USD
CY2013Q1	us-gaap	Derivative Instruments Gain Loss Recognized In Income Net DerivativeInstrumentsGainLossRecognizedInIncomeNet	-700000	USD
CY2013Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5900000	USD
CY2012Q4	us-gaap	Due To Related Parties Current DueToRelatedPartiesCurrent	7900000	USD
CY2013Q1	us-gaap	Due To Related Parties Current DueToRelatedPartiesCurrent	12300000	USD
CY2012Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.39
CY2013Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.75
CY2012Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.38
CY2013Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.73
CY2012Q1	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.381
CY2013Q1	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.197
CY2013Q1	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	33100000	USD
CY2012Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	39300000	USD
CY2013Q1	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	800000	USD
CY2012Q1	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	1300000	USD
CY2013Q1	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	800000	USD
CY2012Q1	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	1300000	USD
CY2013Q1	us-gaap	Fair Value Assumptions Expected Dividend Payments FairValueAssumptionsExpectedDividendPayments	0.24
CY2013Q1	us-gaap	Fair Value Assumptions Risk Free Interest Rate FairValueAssumptionsRiskFreeInterestRate	0.0025
CY2013Q1	us-gaap	Fair Value Assumptions Weighted Average Volatility Rate FairValueAssumptionsWeightedAverageVolatilityRate	0.172
CY2013Q1	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	35000000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	35400000	USD
CY2012Q1	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	700000	USD
CY2013Q1	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	-7200000	USD
CY2012Q1	us-gaap	Gain Loss On Investments GainLossOnInvestments	0	USD
CY2013Q1	us-gaap	Gain Loss On Investments GainLossOnInvestments	500000	USD
CY2012Q4	us-gaap	Goodwill Goodwill	37200000	USD
CY2013Q1	us-gaap	Goodwill Goodwill	37200000	USD
CY2012Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	42800000	USD
CY2013Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	41700000	USD
CY2013Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2012Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2013Q1	us-gaap	Income Tax Examination Liability Refund Adjustment From Settlement With Taxing Authority IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority	-7900000	USD
CY2012Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	16300000	USD
CY2013Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8200000	USD
CY2013Q1	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	8200000	USD
CY2012Q1	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	16300000	USD
CY2012Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	59900000	USD
CY2013Q1	us-gaap	Inventory Finished Goods InventoryFinishedGoods	61200000	USD
CY2012Q4	us-gaap	Inventory Lifo Reserve InventoryLIFOReserve	24500000	USD
CY2013Q1	us-gaap	Inventory Lifo Reserve InventoryLIFOReserve	20800000	USD
CY2013Q1	us-gaap	Income Taxes Paid IncomeTaxesPaid	700000	USD
CY2012Q1	us-gaap	Income Taxes Paid IncomeTaxesPaid	200000	USD
CY2012Q4	us-gaap	Income Taxes Receivable Noncurrent IncomeTaxesReceivableNoncurrent	2900000	USD
CY2013Q1	us-gaap	Income Taxes Receivable Noncurrent IncomeTaxesReceivableNoncurrent	0	USD
CY2013Q1	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	23600000	USD
CY2012Q1	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	31300000	USD
CY2012Q1	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	3300000	USD
CY2013Q1	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	9900000	USD
CY2013Q1	us-gaap	Increase Decrease In Due To Affiliates Current IncreaseDecreaseInDueToAffiliatesCurrent	4400000	USD
CY2012Q1	us-gaap	Increase Decrease In Due To Affiliates Current IncreaseDecreaseInDueToAffiliatesCurrent	8000000	USD
CY2012Q1	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-10400000	USD
CY2013Q1	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	9600000	USD
CY2013Q1	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	-19500000	USD
CY2012Q1	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	4300000	USD
CY2012Q1	us-gaap	Increase Decrease In Other Noncurrent Assets And Liabilities Net IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet	1500000	USD
CY2013Q1	us-gaap	Increase Decrease In Other Noncurrent Assets And Liabilities Net IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet	1400000	USD
CY2012Q1	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	1900000	USD
CY2013Q1	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	2300000	USD
CY2012Q1	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-7200000	USD
CY2013Q1	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	0	USD
CY2013Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2012	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2012Q1	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	600000	USD
CY2013Q1	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	400000	USD
CY2012Q1	us-gaap	Interest Expense InterestExpense	4100000	USD
CY2013Q1	us-gaap	Interest Expense InterestExpense	9300000	USD
CY2012Q1	us-gaap	Interest Paid InterestPaid	400000	USD
CY2013Q1	us-gaap	Interest Paid InterestPaid	400000	USD
CY2013Q1	us-gaap	Interest Payable Current InterestPayableCurrent	10300000	USD
CY2012Q4	us-gaap	Interest Payable Current InterestPayableCurrent	3700000	USD
CY2013Q1	us-gaap	Inventory Lifo Reserve Period Charge InventoryLIFOReservePeriodCharge	-3700000	USD
CY2012Q1	us-gaap	Inventory Lifo Reserve Period Charge InventoryLIFOReservePeriodCharge	-2900000	USD
CY2012Q4	us-gaap	Inventory Net InventoryNet	186000000	USD
CY2013Q1	us-gaap	Inventory Net InventoryNet	199300000	USD
CY2013Q1	us-gaap	Inventory Raw Materials InventoryRawMaterials	52800000	USD
CY2012Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	53900000	USD
CY2013Q1	us-gaap	Inventory Work In Process InventoryWorkInProcess	68000000	USD
CY2012Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	55500000	USD
CY2013Q1	us-gaap	Investment Income Interest InvestmentIncomeInterest	100000	USD
CY2012Q1	us-gaap	Investment Income Interest InvestmentIncomeInterest	100000	USD
CY2013Q1	us-gaap	Investments In And Advances To Affiliates At Fair Value InvestmentsInAndAdvancesToAffiliatesAtFairValue	0	USD
CY2012Q4	us-gaap	Investments In And Advances To Affiliates At Fair Value InvestmentsInAndAdvancesToAffiliatesAtFairValue	0	USD
CY2012Q4	us-gaap	Land Land	22600000	USD
CY2013Q1	us-gaap	Land Land	22600000	USD
CY2013Q1	us-gaap	Liabilities Liabilities	679600000	USD
CY2012Q4	us-gaap	Liabilities Liabilities	681700000	USD
CY2013Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1764400000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1752500000	USD
CY2013Q1	us-gaap	Liabilities Current LiabilitiesCurrent	157200000	USD
CY2012Q4	us-gaap	Liabilities Current LiabilitiesCurrent	161600000	USD
CY2012Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	380300000	USD
CY2013Q1	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	382300000	USD
CY2012Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	400400000	USD
CY2013Q1	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	403500000	USD
CY2013Q1	us-gaap	Multiemployer Plan Period Contributions MultiemployerPlanPeriodContributions	800000	USD
CY2012Q1	us-gaap	Multiemployer Plan Period Contributions MultiemployerPlanPeriodContributions	800000	USD
CY2013Q1	us-gaap	Nature Of Operations NatureOfOperations	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:8px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"></font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Organization and Nature of Operations.</font><font style="font-family:inherit;font-size:10pt;"> Kaiser Aluminum Corporation (together with its subsidiaries, unless the context otherwise requires, the “Company”) specializes in the production of semi-fabricated specialty aluminum products, such as aluminum sheet and plate and extruded and drawn products, primarily used in aerospace/high strength, general engineering, automotive, and other industrial end market applications. The Company has one operating segment, Fabricated Products. See </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">Note 11</font><font style="font-family:inherit;font-size:10pt;"> for additional information regarding the Company’s reportable segment and its other business units.</font></div></div>
CY2012Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-5700000	USD
CY2013Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-22000000	USD
CY2012Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1800000	USD
CY2013Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-9700000	USD
CY2013Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	6300000	USD
CY2012Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	35000000	USD
CY2012Q1	us-gaap	Net Income Loss NetIncomeLoss	26500000	USD
CY2013Q1	us-gaap	Net Income Loss NetIncomeLoss	33500000	USD
CY2012Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	46200000	USD
CY2013Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	50000000	USD
CY2012Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	51800000	USD
CY2013Q1	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	38400000	USD
CY2012Q4	us-gaap	Other Assets OtherAssets	300000	USD
CY2013Q1	us-gaap	Other Assets OtherAssets	200000	USD
CY2013Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	88800000	USD
CY2012Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	86000000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax	-400000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax	-400000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicBenefitCostBeforeTax	-1100000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicBenefitCostBeforeTax	-1000000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Pension Cost Net Of Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax	-700000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Pension Cost Net Of Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax	-600000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	1700000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	1800000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	400000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-300000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	400000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-300000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1200000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1100000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeBeforeTax	0	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeBeforeTax	-400000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	-300000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	-100000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Reclassification Pension And Other Postretirement Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeLossReclassificationPensionAndOtherPostretirementBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostTax	100000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Loss Reclassification Pension And Other Postretirement Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeLossReclassificationPensionAndOtherPostretirementBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostTax	300000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	700000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	500000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostBeforeTax	300000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostBeforeTax	800000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax	500000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax	200000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	300000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	300000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	300000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	200000	USD
CY2013Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	100000	USD
CY2012Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	0	USD
CY2012Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	16700000	USD
CY2013Q1	us-gaap	Other Inventory Supplies OtherInventorySupplies	17300000	USD
CY2012Q4	us-gaap	Other Liabilities OtherLiabilities	3400000	USD
CY2013Q1	us-gaap	Other Liabilities OtherLiabilities	3400000	USD
CY2012Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	134500000	USD
CY2013Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	135200000	USD
CY2013Q1	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	2400000	USD
CY2012Q1	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-800000	USD
CY2012Q1	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	100000	USD
CY2013Q1	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	0	USD
CY2012Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	700000	USD
CY2013Q1	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1000000	USD
CY2013Q1	us-gaap	Other Receivables OtherReceivables	11800000	USD
CY2012Q4	us-gaap	Other Receivables OtherReceivables	3400000	USD
CY2012Q1	us-gaap	Other Significant Noncash Transaction Value Of Consideration Given1 OtherSignificantNoncashTransactionValueOfConsiderationGiven1	0	USD
CY2013Q1	us-gaap	Other Significant Noncash Transaction Value Of Consideration Given1 OtherSignificantNoncashTransactionValueOfConsiderationGiven1	1500000	USD
CY2013Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	14700000	USD
CY2012Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2013Q1	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	5900000	USD
CY2012Q1	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	4900000	USD
CY2012Q1	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	2100000	USD
CY2013Q1	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	2200000	USD
CY2013Q1	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	85600000	USD
CY2012Q1	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	0	USD
CY2013Q1	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	9300000	USD
CY2012Q1	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	9000000	USD
CY2013Q1	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2012Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2013Q1	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2012Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2012Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2013Q1	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2012Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2013Q1	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2013Q1	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	71000000	USD
CY2012Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	70100000	USD
CY2012Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	4100000	USD
CY2013Q1	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	3900000	USD
CY2013Q1	us-gaap	Prepaid Taxes PrepaidTaxes	4700000	USD
CY2012Q4	us-gaap	Prepaid Taxes PrepaidTaxes	2100000	USD
CY2012Q1	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	0	USD
CY2013Q1	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	85200000	USD
CY2013Q1	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	503400000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	494700000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	384300000	USD
CY2013Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	386400000	USD
CY2012Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	1300000	USD
CY2013Q1	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	1300000	USD
CY2012Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	10000000	USD
CY2013Q1	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	10000000	USD
CY2013Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	179000000	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	151200000	USD
CY2013Q1	us-gaap	Revenues From External Customers RevenuesFromExternalCustomers	337400000	USD
CY2012Q1	us-gaap	Revenues From External Customers RevenuesFromExternalCustomers	365400000	USD
CY2012Q1	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	365400000	USD
CY2013Q1	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	337400000	USD
CY2012Q4	us-gaap	Self Insurance Reserve Noncurrent SelfInsuranceReserveNoncurrent	24000000	USD
CY2013Q1	us-gaap	Self Insurance Reserve Noncurrent SelfInsuranceReserveNoncurrent	23500000	USD
CY2013Q1	us-gaap	Share Based Compensation ShareBasedCompensation	2600000	USD
CY2012Q1	us-gaap	Share Based Compensation ShareBasedCompensation	2500000	USD
CY2013Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	2722222	shares
CY2013Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	865562	shares
CY2013Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	0	shares
CY2013Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2013Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	39.90
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	39.90
CY2013Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	80.01
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	80.01
CY2013Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	20791	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	20791	shares
CY2013Q1	us-gaap	Share Price SharePrice	64.65
CY2013Q1	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P4Y
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P4Y3M
CY2013Q1	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	35838	shares
CY2012Q1	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	45128	shares
CY2013Q1	us-gaap	Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Amount Of Unrecorded Benefit SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit	3500000	USD
CY2013Q1	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	0	shares
CY2013Q2	us-gaap	Stock Repurchase Program Authorized Amount StockRepurchaseProgramAuthorizedAmount	75000000	USD
CY2013Q1	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount	30700000	USD
CY2012	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount	46900000	USD
CY2013Q2	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount	92800000	USD
CY2013Q1	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	2200000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	1070800000	USD
CY2013Q1	us-gaap	Stockholders Equity StockholdersEquity	1084800000	USD
CY2012Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	3100000	USD
CY2013Q1	us-gaap	Taxes Payable Current TaxesPayableCurrent	5400000	USD
CY2013Q1	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	62.62
CY2013Q2	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	60.94
CY2012Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	1724606	shares
CY2013Q1	us-gaap	Treasury Stock Shares TreasuryStockShares	1984202	shares
CY2013Q1	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	259596	shares
CY2013Q2	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	210835	shares
CY2012Q4	us-gaap	Treasury Stock Value TreasuryStockValue	72300000	USD
CY2013Q1	us-gaap	Treasury Stock Value TreasuryStockValue	88500000	USD
CY2013Q1	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	16200000	USD
CY2013Q1	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	2500000	USD
CY2012Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	200000	USD
CY2013Q1	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-300000	USD
CY2012Q1	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	3600000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	15700000	USD
CY2013Q1	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	8800000	USD
CY2013Q1	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	7700000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	14600000	USD
CY2013Q1	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:8px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"></font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Use of Estimates in the Preparation of Financial Statements.</font><font style="font-family:inherit;font-size:10pt;"> The preparation of financial statements in accordance with GAAP requires the use of estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities known to exist as of the date the financial statements are published, and the reported amounts of revenues and expenses during the reporting period. Uncertainties with respect to such estimates and assumptions are inherent in the preparation of the Company’s consolidated financial statements; accordingly, it is possible that the actual results could differ from these estimates and assumptions, which could have a material effect on the reported amounts of the Company’s consolidated financial position and results of operations.</font></div></div>
CY2013Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19366000	shares
CY2012Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19161000	shares
CY2013Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19143000	shares
CY2012Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19059000	shares
CY2012Q4	kalu	Accrued Annual Veba Contribution AccruedAnnualVebaContribution	20000000	USD
CY2013Q1	kalu	Accrued Annual Veba Contribution AccruedAnnualVebaContribution	0	USD
CY2012Q4	kalu	Active Property Plant And Equipment Net ActivePropertyPlantAndEquipmentNet	383300000	USD
CY2013Q1	kalu	Idled Equipment IdledEquipment	1000000	USD
CY2012Q4	kalu	Idled Equipment IdledEquipment	1000000	USD
CY2013Q1	kalu	Active Property Plant And Equipment Net ActivePropertyPlantAndEquipmentNet	385400000	USD
CY2013Q1	kalu	Call Option Fair Value Assumptions Credit Spread CallOptionFairValueAssumptionsCreditSpread	220	basispoints
CY2013Q1	kalu	Constant Maturity Treasury Rate Specified Year One ConstantMaturityTreasuryRateSpecifiedYearOne	P2Y
CY2012Q1	kalu	Defined Benefit Plan Net Periodic Benefit Cost And Charges Relating To Other Benefit Plans DefinedBenefitPlanNetPeriodicBenefitCostAndChargesRelatingToOtherBenefitPlans	1600000	USD
CY2013Q1	kalu	Defined Benefit Plan Net Periodic Benefit Cost And Charges Relating To Other Benefit Plans DefinedBenefitPlanNetPeriodicBenefitCostAndChargesRelatingToOtherBenefitPlans	-400000	USD
CY2012Q1	kalu	Amortization Of Option Premiums AmortizationOfOptionPremiums	100000	USD
CY2013Q1	kalu	Amortization Of Option Premiums AmortizationOfOptionPremiums	0	USD
CY2012Q1	kalu	Domestic Tax DomesticTax	15600000	USD
CY2013Q1	kalu	Domestic Tax DomesticTax	15400000	USD
CY2012Q1	kalu	Effective Income Tax Rate Reconciliation Change In Unrecognized Tax Benefits Including Interest And Penalty EffectiveIncomeTaxRateReconciliationChangeInUnrecognizedTaxBenefitsIncludingInterestAndPenalty	0.003
CY2013Q1	kalu	Effective Income Tax Rate Reconciliation Change In Unrecognized Tax Benefits Including Interest And Penalty EffectiveIncomeTaxRateReconciliationChangeInUnrecognizedTaxBenefitsIncludingInterestAndPenalty	-0.179
CY2013Q1	kalu	Eva Measurement Period EvaMeasurementPeriod	P1Y
CY2013Q1	kalu	Expected Period Related To Excess Environmental Costs Over Current Accruals ExpectedPeriodRelatedToExcessEnvironmentalCostsOverCurrentAccruals	P30Y
CY2013Q1	kalu	Expected Period Related To Remediation Expenditures For Environmental Contingencies ExpectedPeriodRelatedToRemediationExpendituresForEnvironmentalContingencies	P30Y
CY2013Q1	kalu	Expected Period Which Unrecognized Tax Benefits Will Be Reduced ExpectedPeriodWhichUnrecognizedTaxBenefitsWillBeReduced	P12M
CY2013Q1	kalu	Fabricated Products Shipments Containing Fixed Price Terms FabricatedProductsShipmentsContainingFixedPriceTerms	29.8	mmlbs
CY2012Q1	kalu	Fabricated Products Shipments Containing Fixed Price Terms FabricatedProductsShipmentsContainingFixedPriceTerms	46.1	mmlbs
CY2012Q1	kalu	Increase Decrease In Unrecognized Tax Benefits Including Interest And Penalties IncreaseDecreaseInUnrecognizedTaxBenefitsIncludingInterestAndPenalties	-100000	USD
CY2013Q1	kalu	Increase Decrease In Unrecognized Tax Benefits Including Interest And Penalties IncreaseDecreaseInUnrecognizedTaxBenefitsIncludingInterestAndPenalties	7500000	USD
CY2012Q1	kalu	Intercompany Loan IntercompanyLoan	0	USD
CY2013Q1	kalu	Intercompany Loan IntercompanyLoan	0	USD
CY2013Q1	kalu	Intercompany Payable Current IntercompanyPayableCurrent	0	USD
CY2012Q4	kalu	Intercompany Payable Current IntercompanyPayableCurrent	0	USD
CY2013Q1	kalu	Intercompany Payable Noncurrent IntercompanyPayableNoncurrent	0	USD
CY2012Q4	kalu	Intercompany Payable Noncurrent IntercompanyPayableNoncurrent	0	USD
CY2013Q1	kalu	Intercompany Receivables Current IntercompanyReceivablesCurrent	0	USD
CY2012Q4	kalu	Intercompany Receivables Current IntercompanyReceivablesCurrent	0	USD
CY2013Q1	kalu	Intercompany Receivables Noncurrent IntercompanyReceivablesNoncurrent	0	USD
CY2012Q4	kalu	Intercompany Receivables Noncurrent IntercompanyReceivablesNoncurrent	0	USD
CY2012Q4	kalu	Net Asset In Respect Of Vebas NetAssetInRespectOfVebas	365900000	USD
CY2013Q1	kalu	Net Asset In Respect Of Vebas NetAssetInRespectOfVebas	372500000	USD
CY2012Q4	kalu	Net Liability In Respect Of Veba NetLiabilityInRespectOfVeba	5300000	USD
CY2013Q1	kalu	Net Liability In Respect Of Veba NetLiabilityInRespectOfVeba	4900000	USD
CY2013Q1	kalu	Option Premiums Paid Current OptionPremiumsPaidCurrent	100000	USD
CY2012Q4	kalu	Option Premiums Paid Current OptionPremiumsPaidCurrent	100000	USD
CY2013Q1	kalu	Option Premiums Received OptionPremiumsReceived	100000	USD
CY2012Q4	kalu	Option Premiums Received OptionPremiumsReceived	100000	USD
CY2013Q1	kalu	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Reclassification Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansReclassificationAdjustmentBeforeTax	1400000	USD
CY2012Q1	kalu	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Reclassification Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansReclassificationAdjustmentBeforeTax	1800000	USD
CY2013Q1	kalu	Other Comprehensive Income Loss Reclassification Adjustment Tax OtherComprehensiveIncomeLossReclassificationAdjustmentTax	400000	USD
CY2012Q1	kalu	Other Comprehensive Income Loss Reclassification Adjustment Tax OtherComprehensiveIncomeLossReclassificationAdjustmentTax	700000	USD
CY2013Q1	kalu	Ownership Interest In Subsidiaries OwnershipInterestInSubsidiaries	1.00
CY2013Q1	kalu	Potential Additional Environmental Costs PotentialAdditionalEnvironmentalCosts	19100000	USD
CY2013Q1	kalu	Reclassification Relating To Dividends On Unvested Equity Awards ReclassificationRelatingToDividendsOnUnvestedEquityAwards	200000	USD
CY2013Q1	kalu	Selling Administrative Research And Development And General Expenses SellingAdministrativeResearchAndDevelopmentAndGeneralExpenses	16100000	USD
CY2012Q1	kalu	Selling Administrative Research And Development And General Expenses SellingAdministrativeResearchAndDevelopmentAndGeneralExpenses	17900000	USD
CY2013Q1	kalu	Unrealized Gains Losses On Operational Hedging Activities UnrealizedGainsLossesOnOperationalHedgingActivities	-700000	USD
CY2012Q1	kalu	Unrealized Gains Losses On Operational Hedging Activities UnrealizedGainsLossesOnOperationalHedgingActivities	3100000	USD
CY2012Q4	kalu	Unrecognized Tax Benefits And Income Tax Penalties And Interest Accrued Noncurrent UnrecognizedTaxBenefitsAndIncomeTaxPenaltiesAndInterestAccruedNoncurrent	15100000	USD
CY2013Q1	kalu	Unrecognized Tax Benefits And Income Tax Penalties And Interest Accrued Noncurrent UnrecognizedTaxBenefitsAndIncomeTaxPenaltiesAndInterestAccruedNoncurrent	11900000	USD
CY2013Q1	dei	Amendment Flag AmendmentFlag	false
CY2013Q1	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2013Q1	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q1
CY2013Q1	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2013
CY2013Q1	dei	Document Period End Date DocumentPeriodEndDate	2013-03-31
CY2013Q1	dei	Document Type DocumentType	10-Q
CY2013Q1	dei	Entity Central Index Key EntityCentralIndexKey	0000811596
CY2013Q1	kalu	Short Term Incentive Compensation Expense ShortTermIncentiveCompensationExpense	4100000	USD
CY2012Q1	kalu	Short Term Incentive Compensation Expense ShortTermIncentiveCompensationExpense	3900000	USD
CY2013Q1	kalu	Time Period Within Which Companys Recorded Estimate Of Its Obligation May Change TimePeriodWithinWhichCompanysRecordedEstimateOfItsObligationMayChange	P12M
CY2013Q1	kalu	Unrealized Gain Loss On Financial Derivatives UnrealizedGainLossOnFinancialDerivatives	400000	USD
CY2012Q1	kalu	Unrealized Gain Loss On Financial Derivatives UnrealizedGainLossOnFinancialDerivatives	500000	USD
CY2013Q2	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	18902523	shares
CY2013Q1	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2012Q2	dei	Entity Public Float EntityPublicFloat	974300000	USD
CY2013Q1	dei	Entity Registrant Name EntityRegistrantName	Kaiser Aluminum Corp

Files In Submission

Name	View Source	Status
0000811596-13-000029-index-headers.html	Edgar Link	pending
0000811596-13-000029-index.html	Edgar Link	pending
0000811596-13-000029.txt	Edgar Link	pending
0000811596-13-000029-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
kalu-20130331.xml	Edgar Link	completed
kalu-20130331.xsd	Edgar Link	pending
kalu-20130331_cal.xml	Edgar Link	unprocessable
kalu-20130331_def.xml	Edgar Link	unprocessable
kalu-20130331_lab.xml	Edgar Link	unprocessable
kalu-20130331_pre.xml	Edgar Link	unprocessable
kalu331201310q.htm	Edgar Link	pending
kaluexhibit105-3312013x10q.htm	Edgar Link	pending
kaluexhibit106-3312013x10q.htm	Edgar Link	pending
kaluexhibit107-3312013x10xq.htm	Edgar Link	pending
kaluexhibit311-3312013x10xq.htm	Edgar Link	pending
kaluexhibit312-3312013x10xq.htm	Edgar Link	pending
kaluexhibit321-3312013x10xq.htm	Edgar Link	pending
kaluexhibit322-3312013x10xq.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$KALU
KAISER ALUMINUM CORP Stock $kalu

2013 Q2 Form 10-Q Financial Statement

#000081159613000029 Filed on April 24, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$KALU KAISER ALUMINUM CORP Stock $kalu

2013 Q2 Form 10-Q Financial Statement

#000081159613000029 Filed on April 24, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$KALU
KAISER ALUMINUM CORP Stock $kalu