$KALU
KAISER ALUMINUM CORP Stock $kalu

$kalu Overview Financials Valuation SEC Filings Company Website

2013 Q1 Form 10-K Financial Statement

#000081159613000019 Filed on February 21, 2013

Income Statement

Concept	2013 Q1	2011 Q4	2011 Q3
Revenue	$337.4M	$317.6M	$322.3M
YoY Change	-7.66%	19.49%	22.36%
Cost Of Revenue	$263.6M	$272.4M	$280.9M
YoY Change	-11.57%	18.64%	22.5%
Gross Profit	$73.10M	$37.30M	$24.90M
YoY Change	3.84%	4.78%	-27.83%
Gross Profit Margin	21.67%	11.74%	7.73%
Selling, General & Admin	$16.10M	$15.40M	$13.70M
YoY Change	-10.06%	1.32%	-16.97%
% of Gross Profit	22.02%	41.29%	55.02%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$7.000M	$6.300M	$6.200M
YoY Change	11.11%	6.78%	29.17%
% of Gross Profit	9.58%	16.89%	24.9%
Operating Expenses	$23.10M	$21.70M	$20.00M
YoY Change	-4.55%	-6.47%	-6.1%
Operating Profit	$50.00M	$15.60M	$4.900M
YoY Change	8.23%	34.48%	-60.16%
Interest Expense	$9.300M	-$31.10M	$4.300M
YoY Change	126.83%	576.09%	16.22%
% of Operating Profit	18.6%	-199.36%	87.76%
Other Income/Expense, Net	$1.000M	-$3.500M	$3.900M
YoY Change	42.86%	133.33%	-208.33%
Pretax Income	$41.70M	$12.90M	$4.500M
YoY Change	-2.57%	104.76%	-23.73%
Income Tax	$8.200M	$6.800M	$400.0K
% Of Pretax Income	19.66%	52.71%	8.89%
Net Earnings	$33.50M	$6.100M	$4.100M
YoY Change	26.42%	-777.78%	-18.0%
Net Earnings / Revenue	9.93%	1.92%	1.27%
Basic Earnings Per Share	$1.75	$0.33	$0.21
Diluted Earnings Per Share	$1.73	$0.33	$0.21
COMMON SHARES
Basic Shares Outstanding	19.14M shares	19.29M shares	19.00M shares
Diluted Shares Outstanding	19.37M shares		19.20M shares

Balance Sheet

Concept	2013 Q1	2011 Q4	2011 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$333.6M	$49.80M	$23.60M
YoY Change	331.57%	-63.27%	-83.58%
Cash & Equivalents	$248.0M	$49.80M	$23.60M
Short-Term Investments	$250.7M	$0.00
Other Short-Term Assets	$71.00M	$78.90M	$1.900M
YoY Change	-5.71%	1417.31%	-63.46%
Inventory	$199.3M	$205.7M	$194.6M
Prepaid Expenses	$3.900M	$3.900M	$4.100M
Receivables	$141.8M	$98.90M	$129.1M
Other Receivables	$11.80M	$1.200M	$1.900M
Total Short-Term Assets	$757.5M	$434.5M	$408.1M
YoY Change	57.09%	-7.83%	-10.47%
LONG-TERM ASSETS
Property, Plant & Equipment	$386.4M	$367.8M	$363.8M
YoY Change	4.21%	3.87%	1.93%
Goodwill	$37.20M	$37.20M	$37.20M
YoY Change	0.0%	1100.0%	1100.0%
Intangibles
YoY Change
Long-Term Investments	$5.800M	$4.900M	$4.600M
YoY Change	13.73%	6.52%	2.22%
Other Assets	$88.80M	$72.30M	$64.80M
YoY Change	40.95%	-12.89%	-14.74%
Total Long-Term Assets	$1.007B	$886.1M	$973.2M
YoY Change	10.88%	4.55%	11.87%
TOTAL ASSETS
Total Short-Term Assets	$757.5M	$434.5M	$408.1M
Total Long-Term Assets	$1.007B	$886.1M	$973.2M
Total Assets	$1.764B	$1.321B	$1.381B
YoY Change	26.91%	0.13%	4.19%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$73.20M	$62.20M	$62.30M
YoY Change	11.93%	22.44%	27.93%
Accrued Expenses	$58.30M	$41.00M	$43.50M
YoY Change	31.01%	-20.54%	-9.75%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$200.0K	$1.300M	$1.300M
YoY Change	-88.24%	0.0%	0.0%
Total Short-Term Liabilities	$157.2M	$149.8M	$153.5M
YoY Change	-3.97%	5.27%	10.67%
LONG-TERM LIABILITIES
Long-Term Debt	$382.3M	$151.4M	$3.700M
YoY Change	12643.33%	1183.05%	-69.42%
Other Long-Term Liabilities	$135.2M	$126.0M	$115.7M
YoY Change	16.45%	-6.46%	-8.25%
Total Long-Term Liabilities	$517.5M	$277.4M	$119.4M
YoY Change	334.51%	89.35%	-13.6%
TOTAL LIABILITIES
Total Short-Term Liabilities	$157.2M	$149.8M	$153.5M
Total Long-Term Liabilities	$517.5M	$277.4M	$119.4M
Total Liabilities	$679.6M	$447.8M	$419.2M
YoY Change	50.02%	4.09%	0.29%
SHAREHOLDERS EQUITY
Retained Earnings	$179.0M	$84.40M	$86.20M
YoY Change	68.08%	8.21%	1.29%
Common Stock	$1.019B	$998.6M	$999.3M
YoY Change	1.09%	1.14%	1.27%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$88.50M	$72.30M	$72.30M
YoY Change	22.41%	0.0%	0.0%
Treasury Stock Shares	1.984M shares	1.725M shares	1.725M shares
Shareholders Equity	$1.085B	$872.8M	$962.1M
YoY Change
Total Liabilities & Shareholders Equity	$1.764B	$1.321B	$1.381B
YoY Change	26.91%	0.13%	4.19%

Cashflow Statement

Concept	2013 Q1	2011 Q4	2011 Q3
OPERATING ACTIVITIES
Net Income	$33.50M	$6.100M	$4.100M
YoY Change	26.42%	-777.78%	-18.0%
Depreciation, Depletion And Amortization	$7.000M	$6.300M	$6.200M
YoY Change	11.11%	6.78%	29.17%
Cash From Operating Activities	$6.300M	$42.00M	-$12.10M
YoY Change	-82.0%	4100.0%	-145.32%
INVESTING ACTIVITIES
Capital Expenditures	-$9.300M	-$9.600M	-$8.800M
YoY Change	3.33%	140.0%	-48.84%
Acquisitions
YoY Change
Other Investing Activities	-$400.0K	$700.0K	-$1.000M
YoY Change	-105.56%		-120.83%
Cash From Investing Activities	-$9.700M	-$8.900M	-$9.800M
YoY Change	438.89%	122.5%	-20.97%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$14.70M
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-$22.00M	-6.900M	-14.30M
YoY Change	285.96%	35.29%	186.0%
NET CHANGE
Cash From Operating Activities	$6.300M	42.00M	-12.10M
Cash From Investing Activities	-$9.700M	-8.900M	-9.800M
Cash From Financing Activities	-$22.00M	-6.900M	-14.30M
Net Change In Cash	-$25.40M	26.20M	-36.20M
YoY Change	-192.36%	-423.46%	-489.25%
FREE CASH FLOW
Cash From Operating Activities	$6.300M	$42.00M	-$12.10M
Capital Expenditures	-$9.300M	-$9.600M	-$8.800M
Free Cash Flow	$15.60M	$51.60M	-$3.300M
YoY Change	-64.55%	932.0%	-107.52%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2012Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	62500000	USD
CY2011Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	62200000	USD
CY2011Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	99800000	USD
CY2012Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	124600000	USD
CY2011Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	98900000	USD
CY2012Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	123800000	USD
CY2012Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	21700000	USD
CY2010Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	20200000	USD
CY2009Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	9700000	USD
CY2011Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	22000000	USD
CY2011	us-gaap	Accrual For Environmental Loss Contingencies Payments AccrualForEnvironmentalLossContingenciesPayments	2100000	USD
CY2012	us-gaap	Accrual For Environmental Loss Contingencies Payments AccrualForEnvironmentalLossContingenciesPayments	1500000	USD
CY2010	us-gaap	Accrual For Environmental Loss Contingencies Payments AccrualForEnvironmentalLossContingenciesPayments	3400000	USD
CY2011	us-gaap	Accrual For Environmental Loss Contingencies Period Increase Decrease AccrualForEnvironmentalLossContingenciesPeriodIncreaseDecrease	3900000	USD
CY2012	us-gaap	Accrual For Environmental Loss Contingencies Period Increase Decrease AccrualForEnvironmentalLossContingenciesPeriodIncreaseDecrease	1200000	USD
CY2010	us-gaap	Accrual For Environmental Loss Contingencies Period Increase Decrease AccrualForEnvironmentalLossContingenciesPeriodIncreaseDecrease	13900000	USD
CY2012Q4	us-gaap	Accrued Environmental Loss Contingencies Current AccruedEnvironmentalLossContingenciesCurrent	3000000	USD
CY2011Q4	us-gaap	Accrued Environmental Loss Contingencies Current AccruedEnvironmentalLossContingenciesCurrent	1200000	USD
CY2012Q4	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	18700000	USD
CY2011Q4	us-gaap	Accrued Environmental Loss Contingencies Noncurrent AccruedEnvironmentalLossContingenciesNoncurrent	20800000	USD
CY2012Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	5300000	USD
CY2011Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	4100000	USD
CY2012Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	111400000	USD
CY2011Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	86900000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-26000000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-85000000	USD
CY2011Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	998400000	USD
CY2012Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1017700000	USD
CY2012	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	5600000	USD
CY2011	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	5200000	USD
CY2010	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	4500000	USD
CY2011	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	200000	USD
CY2012	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	1300000	USD
CY2010	us-gaap	Adjustments To Additional Paid In Capital Warrant Issued AdjustmentsToAdditionalPaidInCapitalWarrantIssued	14300000	USD
CY2011	us-gaap	Advertising Expense AdvertisingExpense	400000	USD
CY2010	us-gaap	Advertising Expense AdvertisingExpense	300000	USD
CY2012	us-gaap	Advertising Expense AdvertisingExpense	400000	USD
CY2012	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	5600000	USD
CY2011	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	5200000	USD
CY2010	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	4500000	USD
CY2011Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	900000	USD
CY2012Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	800000	USD
CY2010	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	4500000	USD
CY2011	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	8600000	USD
CY2012	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	9800000	USD
CY2011	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2200000	USD
CY2012	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1800000	USD
CY2010	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	300000	USD
CY2012	us-gaap	Asset Impairment Charges AssetImpairmentCharges	4400000	USD
CY2010	us-gaap	Asset Impairment Charges AssetImpairmentCharges	4600000	USD
CY2011	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2011Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	4000000	USD
CY2010Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	3800000	USD
CY2012Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	4100000	USD
CY2009Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	3500000	USD
CY2012	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	300000	USD
CY2011	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	300000	USD
CY2010	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	300000	USD
CY2010	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	0	USD
CY2011	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	0	USD
CY2012	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	0	USD
CY2010	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	0	USD
CY2011	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	100000	USD
CY2012	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	500000	USD
CY2010	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	1100000	USD
CY2011	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	0	USD
CY2012	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	0	USD
CY2012Q4	us-gaap	Assets Current AssetsCurrent	741700000	USD
CY2011Q4	us-gaap	Assets Current AssetsCurrent	434500000	USD
CY2011Q4	us-gaap	Available For Sale Securities Noncurrent AvailableForSaleSecuritiesNoncurrent	4900000	USD
CY2011Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	3800000	USD
CY2012Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	3800000	USD
CY2011Q4	us-gaap	Assets Assets	1320600000	USD
CY2012Q4	us-gaap	Assets Assets	1752500000	USD
CY2010Q4	us-gaap	Assets Assets	1318900000	USD
CY2011Q4	us-gaap	Available For Sale Securities Current AvailableForSaleSecuritiesCurrent	0	USD
CY2012Q4	us-gaap	Available For Sale Securities Current AvailableForSaleSecuritiesCurrent	85000000	USD
CY2012Q4	us-gaap	Available For Sale Securities Noncurrent AvailableForSaleSecuritiesNoncurrent	5600000	USD
CY2012Q4	us-gaap	Bank Overdrafts BankOverdrafts	4700000	USD
CY2011Q4	us-gaap	Bank Overdrafts BankOverdrafts	0	USD
CY2012Q4	us-gaap	Billed Contract Receivables BilledContractReceivables	124400000	USD
CY2011Q4	us-gaap	Billed Contract Receivables BilledContractReceivables	98900000	USD
CY2011Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	45900000	USD
CY2012Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	50900000	USD
CY2011	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	1800000	USD
CY2012	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	3400000	USD
CY2010	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	1700000	USD
CY2012	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	100000	USD
CY2010	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	0	USD
CY2011	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	300000	USD
CY2012Q4	us-gaap	Cash Cash	107900000	USD
CY2011Q4	us-gaap	Cash Cash	49800000	USD
CY2011	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	4900000	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
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	135600000	USD
CY2009Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	30300000	USD
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-85800000	USD
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	223600000	USD
CY2010	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	105300000	USD
CY2012Q4	us-gaap	Commercial Paper At Carrying Value CommercialPaperAtCarryingValue	165500000	USD
CY2011Q4	us-gaap	Commercial Paper At Carrying Value CommercialPaperAtCarryingValue	0	USD
CY2012Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2011Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2012Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.25
CY2012	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.00
CY2011	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.96
CY2010	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.96
CY2013Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.30
CY2011Q4	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
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	90000000	shares
CY2011Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	90000000	shares
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	21037841	shares
CY2012Q1	us-gaap	Cost Of Goods Sold CostOfGoodsSold	298100000	USD
CY2011Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	20977791	shares
CY2011Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	19253185	shares
CY2012Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	19313235	shares
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	200000	USD
CY2011Q4	us-gaap	Common Stock Value CommonStockValue	200000	USD
CY2010	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	30500000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	144800000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-40200000	USD
CY2012	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:8px;text-align:left;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Concentration of Credit Risk.</font><font style="font-family:inherit;font-size:10pt;"> Financial arrangements which potentially subject the Company to concentrations of credit risk consist of metal, currency, electricity and natural gas derivative contracts, certain cash-settled call options that the Company purchased in March 2010 (the “Call Options”) (see </font><font style="font-family:Times New Roman;font-size:10pt;color:#000000;text-decoration:none;">Note 3</font><font style="font-family:inherit;font-size:10pt;">), and arrangements related to the Company's cash equivalents and short-term investments. If the market value of the Company's net commodity and currency derivative positions with certain counterparties exceeds the applicable threshold, if any, the counterparty is required to post margin by transferring cash collateral in excess of the threshold to the Company. Conversely, if the market value of these net derivative positions falls below a specified threshold, the Company is required to post margin by transferring cash collateral below the threshold to certain counterparties. At both </font><font style="font-family:Times New Roman;font-size:10pt;color:#000000;text-decoration:none;">December 31, 2012</font><font style="font-family:inherit;font-size:10pt;"> and </font><font style="font-family:Times New Roman;font-size:10pt;color:#000000;text-decoration:none;">December 31, 2011</font><font style="font-family:inherit;font-size:10pt;">, the Company had </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">no</font><font style="font-family:inherit;font-size:10pt;"> margin deposits with or from its counterparties.</font></div><div style="line-height:120%;padding-top:8px;text-align:left;text-indent:20px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Company is exposed to credit loss in the event of nonperformance by counterparties on derivative contracts used in hedging activities as well as failure of counterparties to return cash collateral previously transferred to the counterparties. The counterparties to the Company's derivative contracts are major financial institutions, and the Company does not expect nonperformance by any of its counterparties.</font></div><div style="line-height:120%;padding-top:8px;text-align:left;text-indent:20px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Company places its cash in commercial paper, savings accounts, demand notes and money market funds. Such money market funds are with high credit quality financial institutions which invest primarily in commercial paper and time deposits of prime quality, short-term repurchase agreements, and U.S. government agency notes.</font></div></div>
CY2012Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	20800000	USD
CY2011Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	24100000	USD
CY2011Q4	us-gaap	Convertible Debt ConvertibleDebt	148000000	USD
CY2012Q4	us-gaap	Convertible Debt ConvertibleDebt	155300000	USD
CY2012	us-gaap	Cost Of Goods Sold CostOfGoodsSold	1116200000	USD
CY2011	us-gaap	Cost Of Goods Sold CostOfGoodsSold	1129000000	USD
CY2010	us-gaap	Cost Of Goods Sold CostOfGoodsSold	946100000	USD
CY2011Q4	us-gaap	Cost Of Goods Sold CostOfGoodsSold	272400000	USD
CY2011Q3	us-gaap	Cost Of Goods Sold CostOfGoodsSold	280900000	USD
CY2011Q2	us-gaap	Cost Of Goods Sold CostOfGoodsSold	290500000	USD
CY2011Q1	us-gaap	Cost Of Goods Sold CostOfGoodsSold	285200000	USD
CY2012Q3	us-gaap	Cost Of Goods Sold CostOfGoodsSold	268900000	USD
CY2012Q4	us-gaap	Cost Of Goods Sold CostOfGoodsSold	264800000	USD
CY2012Q2	us-gaap	Cost Of Goods Sold CostOfGoodsSold	284400000	USD
CY2011	us-gaap	Costs And Expenses CostsAndExpenses	1246300000	USD
CY2010	us-gaap	Costs And Expenses CostsAndExpenses	1038000000	USD
CY2012	us-gaap	Costs And Expenses CostsAndExpenses	1194200000	USD
CY2010	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-1400000	USD
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2011	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	-300000	USD
CY2010	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	-100000	USD
CY2012	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	2300000	USD
CY2010	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	400000	USD
CY2012	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	2100000	USD
CY2011	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-1800000	USD
CY2010	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	500000	USD
CY2011	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-100000	USD
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-200000	USD
CY2012Q4	us-gaap	Debt Instrument Convertible Conversion Price1 DebtInstrumentConvertibleConversionPrice1	48.28
CY2013Q1	us-gaap	Debt Instrument Convertible Conversion Price1 DebtInstrumentConvertibleConversionPrice1	48.24
CY2012	us-gaap	Debt Instrument Convertible Remaining Discount Amortization Period1 DebtInstrumentConvertibleRemainingDiscountAmortizationPeriod1	P2Y3M18D
CY2012Q4	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	225000000	USD
CY2011Q4	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	0	USD
CY2012	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	900000	USD
CY2010	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	1300000	USD
CY2011	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	200000	USD
CY2012Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	5800000	USD
CY2011Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	5100000	USD
CY2011	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	2300000	USD
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	113000000	USD
CY2010	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	34400000	USD
CY2011Q4	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	7800000	USD
CY2012Q4	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	11700000	USD
CY2012	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	200000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	226900000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	102000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	35300000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	39600000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	7600000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	0	USD
CY2011	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	500000	USD
CY2010	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-200000	USD
CY2010	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	44400000	USD
CY2011	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2100000	USD
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	128500000	USD
CY2010	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	13300000	USD
CY2011	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	17600000	USD
CY2012	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	52000000	USD
CY2011Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	13500000	USD
CY2012Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	6700000	USD
CY2011Q4	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	3300000	USD
CY2012Q4	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	0	USD
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	15300000	USD
CY2010	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	10200000	USD
CY2011	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-700000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	1700000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	8300000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	289900000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	161500000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Liabilities Net Current DeferredTaxAssetsLiabilitiesNetCurrent	63000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net Current DeferredTaxAssetsLiabilitiesNetCurrent	59500000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	226900000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	102000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	404700000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	368100000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	59500000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	63000000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	18800000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	18700000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	206600000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	114800000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	47600000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	136900000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	67200000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	69700000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Five Fiscal Years Thereafter DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter	115000000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Next Twelve Months DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths	23100000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Five DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive	23500000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Four DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour	23500000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Three DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree	23500000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Two DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo	23400000	USD
CY2012	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-11500000	USD
CY2011	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	-5700000	USD
CY2010	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	5100000	USD
CY2011	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	7100000	USD
CY2010	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	6500000	USD
CY2012	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	7600000	USD
CY2011	us-gaap	Depreciation Depreciation	23000000	USD
CY2010	us-gaap	Depreciation Depreciation	19500000	USD
CY2012	us-gaap	Depreciation Depreciation	24700000	USD
CY2012	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	26500000	USD
CY2011	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	25200000	USD
CY2010	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	19800000	USD
CY2012Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	3000000	USD
CY2011Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	0	USD
CY2011Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	46200000	USD
CY2012Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	55500000	USD
CY2010	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-5500000	USD
CY2011	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-25900000	USD
CY2012	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	16000000	USD
CY2011	us-gaap	Derivative Instruments Gain Loss Recognized In Income Net DerivativeInstrumentsGainLossRecognizedInIncomeNet	4400000	USD
CY2012	us-gaap	Derivative Instruments Gain Loss Recognized In Income Net DerivativeInstrumentsGainLossRecognizedInIncomeNet	-19100000	USD
CY2010	us-gaap	Derivative Instruments Gain Loss Recognized In Income Net DerivativeInstrumentsGainLossRecognizedInIncomeNet	-1900000	USD
CY2012Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	3100000	USD
CY2011Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	14800000	USD
CY2011Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	55500000	USD
CY2012Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	63500000	USD
CY2012	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	19600000	USD
CY2010	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	19000000	USD
CY2011	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	18900000	USD
CY2012Q4	us-gaap	Due To Related Parties Current DueToRelatedPartiesCurrent	7900000	USD
CY2011Q4	us-gaap	Due To Related Parties Current DueToRelatedPartiesCurrent	14400000	USD
CY2010	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.61
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.32
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.49
CY2011Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.22
CY2011Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.33
CY2011Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.57
CY2011Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.21
CY2012Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.52
CY2012Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.10
CY2012Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.48
CY2012Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.39
CY2010	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.61
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.45
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.32
CY2011Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.57
CY2011Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.21
CY2011Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.22
CY2011Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.33
CY2012Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.38
CY2012Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.47
CY2012Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.51
CY2012Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.09
CY2012	us-gaap	Effect Of Lifo Inventory Liquidation On Income EffectOfLIFOInventoryLiquidationOnIncome	22300000	USD
CY2011Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	30900000	USD
CY2012Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	39300000	USD
CY2012	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2100000	USD
CY2010	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1700000	USD
CY2011	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2000000	USD
CY2012	us-gaap	Entity Wide Revenue Major Customer Percentage EntityWideRevenueMajorCustomerPercentage	0.22
CY2010	us-gaap	Entity Wide Revenue Major Customer Percentage EntityWideRevenueMajorCustomerPercentage	0.23
CY2011	us-gaap	Entity Wide Revenue Major Customer Percentage EntityWideRevenueMajorCustomerPercentage	0.21
CY2011	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	200000	USD
CY2010	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	0	USD
CY2012	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	1300000	USD
CY2010	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	0	USD
CY2011	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	200000	USD
CY2012	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	1300000	USD
CY2011Q4	us-gaap	Fair Value Assets Level2 To Level1 Transfers Amount FairValueAssetsLevel2ToLevel1TransfersAmount	220700000	USD
CY2012	us-gaap	Fair Value Assumptions Expected Dividend Payments FairValueAssumptionsExpectedDividendPayments	0.24
CY2012	us-gaap	Fair Value Assumptions Risk Free Interest Rate FairValueAssumptionsRiskFreeInterestRate	0.0028
CY2012	us-gaap	Fair Value Assumptions Weighted Average Volatility Rate FairValueAssumptionsWeightedAverageVolatilityRate	0.204
CY2012	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	45600000	USD
CY2010	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	6500000	USD
CY2011	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	14400000	USD
CY2011	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P24Y
CY2011Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	2500000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	4300000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	27300000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	1700000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	1600000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	1600000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	1600000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	1600000	USD
CY2011Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	39700000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	39700000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	35400000	USD
CY2011Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	37200000	USD
CY2011	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	3400000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	139600000	USD
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	25100000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	41300000	USD
CY2010	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2011	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	600000	USD
CY2010	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	-700000	USD
CY2012	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	2300000	USD
CY2011	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-200000	USD
CY2010	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-100000	USD
CY2012	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	100000	USD
CY2011Q4	us-gaap	Goodwill Goodwill	37200000	USD
CY2012Q4	us-gaap	Goodwill Goodwill	37200000	USD
CY2012	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2011	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2011Q4	us-gaap	Gross Profit GrossProfit	37300000	USD
CY2011Q1	us-gaap	Gross Profit GrossProfit	41700000	USD
CY2011Q3	us-gaap	Gross Profit GrossProfit	24900000	USD
CY2011Q2	us-gaap	Gross Profit GrossProfit	38800000	USD
CY2012Q1	us-gaap	Gross Profit GrossProfit	70400000	USD
CY2012Q2	us-gaap	Gross Profit GrossProfit	60700000	USD
CY2012Q4	us-gaap	Gross Profit GrossProfit	49100000	USD
CY2012Q3	us-gaap	Gross Profit GrossProfit	78900000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	134500000	USD
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	23000000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	37900000	USD
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	2100000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	5100000	USD
CY2012	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	400000	USD
CY2011	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	1100000	USD
CY2011	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	800000	USD
CY2012	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	16200000	USD
CY2010	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13100000	USD
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	53800000	USD
CY2011	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	16200000	USD
CY2010	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	13100000	USD
CY2012	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	53800000	USD
CY2011	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	0	USD
CY2012	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-100000	USD
CY2010	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	200000	USD
CY2012	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	500000	USD
CY2010	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-1500000	USD
CY2011	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-600000	USD
CY2010	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	8800000	USD
CY2012	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	48900000	USD
CY2011	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	14500000	USD
CY2012	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	300000	USD
CY2010	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	300000	USD
CY2011	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	400000	USD
CY2010	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	600000	USD
CY2012	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	3800000	USD
CY2010	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	4700000	USD
CY2011	us-gaap	Income Taxes Paid IncomeTaxesPaid	3500000	USD
CY2010	us-gaap	Income Taxes Paid IncomeTaxesPaid	800000	USD
CY2012	us-gaap	Income Taxes Paid IncomeTaxesPaid	1800000	USD
CY2012Q4	us-gaap	Income Taxes Receivable Noncurrent IncomeTaxesReceivableNoncurrent	2900000	USD
CY2011Q4	us-gaap	Income Taxes Receivable Noncurrent IncomeTaxesReceivableNoncurrent	2800000	USD
CY2012	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	27100000	USD
CY2010	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	1200000	USD
CY2011	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	8300000	USD
CY2010	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	4200000	USD
CY2012	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	-1300000	USD
CY2011	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	10900000	USD
CY2011	us-gaap	Increase Decrease In Due To Affiliates Current IncreaseDecreaseInDueToAffiliatesCurrent	-2700000	USD
CY2010	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	56300000	USD
CY2012	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-24600000	USD
CY2010	us-gaap	Increase Decrease In Accounts Receivable Related Parties IncreaseDecreaseInAccountsReceivableRelatedParties	-200000	USD
CY2011	us-gaap	Increase Decrease In Accounts Receivable Related Parties IncreaseDecreaseInAccountsReceivableRelatedParties	0	USD
CY2012	us-gaap	Increase Decrease In Accounts Receivable Related Parties IncreaseDecreaseInAccountsReceivableRelatedParties	0	USD
CY2010	us-gaap	Increase Decrease In Due To Affiliates Current IncreaseDecreaseInDueToAffiliatesCurrent	8100000	USD
CY2012	us-gaap	Increase Decrease In Due To Affiliates Current IncreaseDecreaseInDueToAffiliatesCurrent	-6500000	USD
CY2011	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	24500000	USD
CY2012	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	10400000	USD
CY2010	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	400000	USD
CY2011	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	-1500000	USD
CY2010	us-gaap	Increase Decrease In Other Noncurrent Assets And Liabilities Net IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet	-24600000	USD
CY2011	us-gaap	Increase Decrease In Other Noncurrent Assets And Liabilities Net IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet	2400000	USD
CY2012	us-gaap	Increase Decrease In Other Noncurrent Assets And Liabilities Net IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet	1100000	USD
CY2012	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-1400000	USD
CY2010	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	900000	USD
CY2011	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	2900000	USD
CY2010	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-1100000	USD
CY2012	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-6900000	USD
CY2011	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	1000000	USD
CY2012	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2010	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2011	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2012	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	1700000	USD
CY2010	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	2800000	USD
CY2011	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	1300000	USD
CY2010	us-gaap	Interest Expense InterestExpense	11800000	USD
CY2011	us-gaap	Interest Expense InterestExpense	18000000	USD
CY2012	us-gaap	Interest Expense InterestExpense	29100000	USD
CY2012	us-gaap	Interest Paid InterestPaid	19400000	USD
CY2011	us-gaap	Interest Paid InterestPaid	10400000	USD
CY2010	us-gaap	Interest Paid InterestPaid	6000000	USD
CY2012Q4	us-gaap	Interest Payable Current InterestPayableCurrent	3700000	USD
CY2011Q4	us-gaap	Interest Payable Current InterestPayableCurrent	2300000	USD
CY2011Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	75900000	USD
CY2012Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	59900000	USD
CY2012Q4	us-gaap	Inventory Lifo Reserve InventoryLIFOReserve	24500000	USD
CY2011Q4	us-gaap	Inventory Lifo Reserve InventoryLIFOReserve	29400000	USD
CY2011	us-gaap	Inventory Lifo Reserve Period Charge InventoryLIFOReservePeriodCharge	-7100000	USD
CY2010	us-gaap	Inventory Lifo Reserve Period Charge InventoryLIFOReservePeriodCharge	16500000	USD
CY2012	us-gaap	Inventory Lifo Reserve Period Charge InventoryLIFOReservePeriodCharge	-4900000	USD
CY2012Q4	us-gaap	Inventory Net InventoryNet	186000000	USD
CY2011Q4	us-gaap	Inventory Net InventoryNet	205700000	USD
CY2011Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	58100000	USD
CY2012Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	53900000	USD
CY2012Q4	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	266700000	USD
CY2012Q4	us-gaap	Line Of Credit Facility Interest Rate At Period End LineOfCreditFacilityInterestRateAtPeriodEnd	0.040
CY2012Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	259800000	USD
CY2011Q4	us-gaap	Margin Deposit Assets MarginDepositAssets	0	USD
CY2012Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	380300000	USD
CY2011Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	151400000	USD
CY2012Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	400400000	USD
CY2011Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	356700000	USD
CY2012Q4	us-gaap	Margin Deposit Assets MarginDepositAssets	0	USD
CY2012Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	55500000	USD
CY2011Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	57500000	USD
CY2011	us-gaap	Investment Income Interest InvestmentIncomeInterest	200000	USD
CY2010	us-gaap	Investment Income Interest InvestmentIncomeInterest	300000	USD
CY2012	us-gaap	Investment Income Interest InvestmentIncomeInterest	400000	USD
CY2011Q4	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
CY2011Q4	us-gaap	Land Land	22600000	USD
CY2010	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	9900000	USD
CY2011	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	10000000	USD
CY2012	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	10000000	USD
CY2011Q4	us-gaap	Liabilities Liabilities	447800000	USD
CY2012Q4	us-gaap	Liabilities Liabilities	681700000	USD
CY2011Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1320600000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1752500000	USD
CY2012Q4	us-gaap	Liabilities Current LiabilitiesCurrent	161600000	USD
CY2011Q4	us-gaap	Liabilities Current LiabilitiesCurrent	149800000	USD
CY2012	us-gaap	Multiemployer Plan Period Contributions MultiemployerPlanPeriodContributions	3900000	USD
CY2010	us-gaap	Multiemployer Plan Period Contributions MultiemployerPlanPeriodContributions	3300000	USD
CY2011	us-gaap	Multiemployer Plan Period Contributions MultiemployerPlanPeriodContributions	3600000	USD
CY2011Q4	us-gaap	Multiemployer Plans Collective Bargaining Arrangement Percentage Of Employers Contributions MultiemployerPlansCollectiveBargainingArrangementPercentageOfEmployersContributions	0.05
CY2010Q4	us-gaap	Multiemployer Plans Collective Bargaining Arrangement Percentage Of Employers Contributions MultiemployerPlansCollectiveBargainingArrangementPercentageOfEmployersContributions	0.05
CY2012	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;text-indent:18px;font-size:10pt;"><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 15</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>
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-32300000	USD
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	85400000	USD
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	193100000	USD
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-121900000	USD
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-116300000	USD
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-46400000	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	62800000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	152400000	USD
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	66300000	USD
CY2011	us-gaap	Net Income Loss NetIncomeLoss	25100000	USD
CY2010	us-gaap	Net Income Loss NetIncomeLoss	12000000	USD
CY2012	us-gaap	Net Income Loss NetIncomeLoss	85800000	USD
CY2011Q3	us-gaap	Net Income Loss NetIncomeLoss	4100000	USD
CY2011Q4	us-gaap	Net Income Loss NetIncomeLoss	6100000	USD
CY2011Q2	us-gaap	Net Income Loss NetIncomeLoss	4100000	USD
CY2011Q1	us-gaap	Net Income Loss NetIncomeLoss	10800000	USD
CY2012Q3	us-gaap	Net Income Loss NetIncomeLoss	29200000	USD
CY2012Q2	us-gaap	Net Income Loss NetIncomeLoss	21000000	USD
CY2012Q1	us-gaap	Net Income Loss NetIncomeLoss	26500000	USD
CY2012Q4	us-gaap	Net Income Loss NetIncomeLoss	9100000	USD
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	85800000	USD
CY2010	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	11900000	USD
CY2011	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	25100000	USD
CY2011Q4	us-gaap	Noncurrent Assets NoncurrentAssets	367800000	USD
CY2012Q4	us-gaap	Noncurrent Assets NoncurrentAssets	384300000	USD
CY2010Q4	us-gaap	Noncurrent Assets NoncurrentAssets	354100000	USD
CY2012	us-gaap	Operating Income Loss OperatingIncomeLoss	165900000	USD
CY2010	us-gaap	Operating Income Loss OperatingIncomeLoss	41100000	USD
CY2011	us-gaap	Operating Income Loss OperatingIncomeLoss	55000000	USD
CY2011Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	19800000	USD
CY2011Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	14700000	USD
CY2011Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	4900000	USD
CY2011Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	15600000	USD
CY2012Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	56200000	USD
CY2012Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	39600000	USD
CY2012Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	46200000	USD
CY2012Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	23900000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	4700000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	2000000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	2500000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-200000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	200000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-500000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-200000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2012	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	-2500000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	95500000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	30000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-105700000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-500000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	200000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	3400000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	4200000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	31200000	USD
CY2012Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	786800000	USD
CY2012Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	51900000	USD
CY2011Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	41000000	USD
CY2011Q4	us-gaap	Other Assets OtherAssets	100000	USD
CY2012Q4	us-gaap	Other Assets OtherAssets	300000	USD
CY2012Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	86000000	USD
CY2011Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	72300000	USD
CY2010	us-gaap	Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax	-1600000	USD
CY2012	us-gaap	Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax	-1700000	USD
CY2011	us-gaap	Other Comprehensive Income Amortization Of Defined Benefit Plan Net Prior Service Cost Recognized In Net Periodic Pension Cost Tax OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanNetPriorServiceCostRecognizedInNetPeriodicPensionCostTax	-1600000	USD
CY2010	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	15800000	USD
CY2012	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	54300000	USD
CY2011	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-68400000	USD
CY2011	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-42200000	USD
CY2012	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	33500000	USD
CY2010	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	9700000	USD
CY2012	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	-4200000	USD
CY2010	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	-4200000	USD
CY2011	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	-4200000	USD
CY2011	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	-2600000	USD
CY2010	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	-2600000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2012	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	USD
CY2010	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	18500000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	59000000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-65300000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-95100000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-30400000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	105800000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	65400000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-18900000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-58800000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-110600000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	87800000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	25500000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-11500000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-36300000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	40400000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Pension And Other Postretirement Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeLossReclassificationPensionAndOtherPostretirementBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostTax	200000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Reclassification Pension And Other Postretirement Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeLossReclassificationPensionAndOtherPostretirementBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostTax	200000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Pension And Other Postretirement Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeLossReclassificationPensionAndOtherPostretirementBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostTax	1100000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	11500000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-40400000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	36500000	USD
CY2011	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostBeforeTax	600000	USD
CY2010	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostBeforeTax	700000	USD
CY2012	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostBeforeTax	3100000	USD
CY2012	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax	2000000	USD
CY2010	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
CY2011	us-gaap	Other Comprehensive Income Reclassification Of Defined Benefit Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax	400000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-100000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	100000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	600000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	100000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-100000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	400000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	200000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	0	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	0	USD
CY2011	us-gaap	Other Income Tax Expense Benefit Continuing Operations OtherIncomeTaxExpenseBenefitContinuingOperations	15900000	USD
CY2012	us-gaap	Other Income Tax Expense Benefit Continuing Operations OtherIncomeTaxExpenseBenefitContinuingOperations	-76800000	USD
CY2010	us-gaap	Other Income Tax Expense Benefit Continuing Operations OtherIncomeTaxExpenseBenefitContinuingOperations	-31700000	USD
CY2011Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	14200000	USD
CY2012Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	16700000	USD
CY2012Q4	us-gaap	Other Liabilities OtherLiabilities	3600000	USD
CY2011Q4	us-gaap	Other Liabilities OtherLiabilities	3200000	USD
CY2012Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	134500000	USD
CY2011Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	126000000	USD
CY2011Q4	us-gaap	Other Long Term Notes Payable OtherLongTermNotesPayable	3400000	USD
CY2012Q4	us-gaap	Other Long Term Notes Payable OtherLongTermNotesPayable	0	USD
CY2010	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	700000	USD
CY2012	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1200000	USD
CY2011	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-400000	USD
CY2010	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	0	USD
CY2011	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	0	USD
CY2012	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	400000	USD
CY2010	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	-400000	USD
CY2012	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	700000	USD
CY2011	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	0	USD
CY2010	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-4200000	USD
CY2011	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4300000	USD
CY2012	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	2800000	USD
CY2011	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	200000	USD
CY2012	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-4500000	USD
CY2010	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-4000000	USD
CY2011Q4	us-gaap	Other Receivables OtherReceivables	1200000	USD
CY2012Q4	us-gaap	Other Receivables OtherReceivables	3400000	USD
CY2010	us-gaap	Participating Securities Distributed And Undistributed Earnings ParticipatingSecuritiesDistributedAndUndistributedEarnings	100000	USD
CY2012	us-gaap	Participating Securities Distributed And Undistributed Earnings ParticipatingSecuritiesDistributedAndUndistributedEarnings	0	USD
CY2011	us-gaap	Participating Securities Distributed And Undistributed Earnings ParticipatingSecuritiesDistributedAndUndistributedEarnings	0	USD
CY2010	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	44200000	USD
CY2011	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2012	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2011	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	18900000	USD
CY2012	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	19600000	USD
CY2010	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	19000000	USD
CY2011	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	2100000	USD
CY2012	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	6600000	USD
CY2010	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	8600000	USD
CY2012	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	2200000	USD
CY2011	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	3100000	USD
CY2010	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	0	USD
CY2012	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	85000000	USD
CY2010	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	4400000	USD
CY2011	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	300000	USD
CY2012	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2010	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	9000000	USD
CY2011	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	83200000	USD
CY2010	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	38900000	USD
CY2012	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	44100000	USD
CY2011	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	32500000	USD
CY2012Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2011Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2012Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2011Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2012Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2011Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2011Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2012Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2011Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	78900000	USD
CY2012Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	70100000	USD
CY2012Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	4100000	USD
CY2011Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	3900000	USD
CY2011Q4	us-gaap	Prepaid Taxes PrepaidTaxes	3800000	USD
CY2012Q4	us-gaap	Prepaid Taxes PrepaidTaxes	2100000	USD
CY2010	us-gaap	Prior Period Reclassification Adjustment PriorPeriodReclassificationAdjustment	3100000	USD
CY2011	us-gaap	Prior Period Reclassification Adjustment PriorPeriodReclassificationAdjustment	-25000000	USD
CY2011	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	0	USD
CY2012	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	0	USD
CY2010	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	175000000	USD
CY2011	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	0	USD
CY2010	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	6700000	USD
CY2012	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	0	USD
CY2011	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	0	USD
CY2010	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	0	USD
CY2012	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	225000000	USD
CY2012	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	0	USD
CY2010	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	14300000	USD
CY2011	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	0	USD
CY2012	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	0	USD
CY2010	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-31400000	USD
CY2011	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	0	USD
CY2011	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	700000	USD
CY2010	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	4800000	USD
CY2012	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	300000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	494700000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	449300000	USD
CY2012	us-gaap	Property Plant And Equipment Impairment PropertyPlantAndEquipmentImpairment	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:8px;text-align:left;text-indent:20px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Property, plant and equipment are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the asset or group of assets may not be recoverable. The Company regularly assesses whether events and circumstances with the potential to trigger impairment have occurred and relies on a number of factors, including operating results, business plans, economic projections, and anticipated future cash flow, to make such assessments. The Company uses an estimate of the future undiscounted cash flows of the related asset or asset group over the estimated remaining life of such asset(s) in measuring whether the asset(s) are recoverable. Measurement of the amount of impairment, if any, is based on the difference between the carrying value of the asset(s) and the estimated fair value of such asset(s). Fair value is determined through a series of standard valuation techniques.</font></div><div style="line-height:120%;padding-top:8px;text-align:left;text-indent:20px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">During 2010, the Company recorded a </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">$2.0</font><font style="font-family:inherit;font-size:10pt;"> impairment charge to write down the carrying amount of idled equipment to represent its estimated fair value, a </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">$1.9</font><font style="font-family:inherit;font-size:10pt;"> impairment charge in connection with the sale of its Greenwood, South Carolina facility and a </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">$0.7</font><font style="font-family:inherit;font-size:10pt;"> impairment charge relating to certain Construction in progress assets in connection with our restructuring efforts in 2009. There were </font><font style="font-family:Times New Roman;font-size:10pt;color:#000000;text-decoration:none;">no</font><font style="font-family:inherit;font-size:10pt;"> impairment charges in </font><font style="font-family:Times New Roman;font-size:10pt;color:#000000;text-decoration:none;">2011</font><font style="font-family:inherit;font-size:10pt;">. During </font><font style="font-family:Times New Roman;font-size:10pt;color:#000000;text-decoration:none;">2012</font><font style="font-family:inherit;font-size:10pt;">, the Company determined not to deploy a portion of the idled assets for future use and recorded an impairment charge of </font><font style="font-family:Times New Roman;font-size:10pt;color:#000000;text-decoration:none;">$4.4</font><font style="font-family:inherit;font-size:10pt;"> to reflect the scrap value of such assets. Asset impairment charges are included in Other operating charges (benefits), net in the Statements of Consolidated Income and are included in the Fabricated Products segment.</font></div><div style="line-height:120%;padding-top:8px;text-align:left;text-indent:20px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Property, plant and equipment held for future development are presented as idled assets. Such assets are evaluated for impairment on a held-and-used basis. Depreciation expense is not adjusted when assets are temporarily idled. </font></div></div>
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	384300000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	367800000	USD
CY2011Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	10400000	USD
CY2012	us-gaap	Restructuring Charges RestructuringCharges	0	USD
CY2012	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	500000	USD
CY2010	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	800000	USD
CY2011	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	100000	USD
CY2010	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	0	USD
CY2011	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	100000	USD
CY2012	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	100000	USD
CY2012	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	4700000	USD
CY2010	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	700000	USD
CY2011	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	8300000	USD
CY2010	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	4900000	USD
CY2012	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	6400000	USD
CY2011	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	6100000	USD
CY2011Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	7800000	USD
CY2012Q4	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
CY2010	us-gaap	Restructuring Charges RestructuringCharges	-300000	USD
CY2011	us-gaap	Restructuring Charges RestructuringCharges	-300000	USD
CY2011Q2	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	0	USD
CY2011Q1	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	0	USD
CY2011Q4	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	0	USD
CY2011Q3	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	-300000	USD
CY2011Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	84400000	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	151200000	USD
CY2011	us-gaap	Revenues From External Customers RevenuesFromExternalCustomers	1301300000	USD
CY2010	us-gaap	Revenues From External Customers RevenuesFromExternalCustomers	1078800000	USD
CY2012	us-gaap	Revenues From External Customers RevenuesFromExternalCustomers	1360100000	USD
CY2011	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	1301300000	USD
CY2012	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	1360100000	USD
CY2010	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	1079100000	USD
CY2011Q2	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	338800000	USD
CY2011Q3	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	322300000	USD
CY2011Q1	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	322600000	USD
CY2011Q4	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	317600000	USD
CY2012Q3	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	335500000	USD
CY2012Q2	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	345200000	USD
CY2012Q1	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	365400000	USD
CY2012Q4	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	314000000	USD
CY2012Q4	us-gaap	Secured Debt Current SecuredDebtCurrent	0	USD
CY2011Q4	us-gaap	Secured Debt Current SecuredDebtCurrent	1300000	USD
CY2012Q4	us-gaap	Self Insurance Reserve Noncurrent SelfInsuranceReserveNoncurrent	24000000	USD
CY2011Q4	us-gaap	Self Insurance Reserve Noncurrent SelfInsuranceReserveNoncurrent	20800000	USD
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	5800000	USD
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	5400000	USD
CY2010	us-gaap	Share Based Compensation ShareBasedCompensation	4700000	USD
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	2600000	USD
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	6300000	USD
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	3500000	USD
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	2722222	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	934521	shares
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	1286	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	0	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	0	shares
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	0	shares
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
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
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	80.01
CY2011Q4	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 Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	20791	shares
CY2011Q4	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 Price SharePrice	61.69
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P4Y3M
CY2011	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P5Y3M
CY2012	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	45801	shares
CY2010	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	11729	shares
CY2011	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	62637	shares
CY2012Q4	us-gaap	Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Amount Of Unrecorded Benefit SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit	3600000	USD
CY2010	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	7300000	USD
CY2012	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	5900000	USD
CY2011	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	1200000	USD
CY2011	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	0	shares
CY2012	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	0	shares
CY2012	us-gaap	Stock Issued During Period Value Issued For Services StockIssuedDuringPeriodValueIssuedForServices	200000	USD
CY2010	us-gaap	Stock Issued During Period Value Issued For Services StockIssuedDuringPeriodValueIssuedForServices	200000	USD
CY2011	us-gaap	Stock Issued During Period Value Issued For Services StockIssuedDuringPeriodValueIssuedForServices	200000	USD
CY2012	us-gaap	Stock Repurchase Program Authorized Amount StockRepurchaseProgramAuthorizedAmount	0	USD
CY2010	us-gaap	Stock Repurchase Program Authorized Amount StockRepurchaseProgramAuthorizedAmount	0	USD
CY2011	us-gaap	Stock Repurchase Program Authorized Amount StockRepurchaseProgramAuthorizedAmount	0	USD
CY2012	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount	46900000	USD
CY2012	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	-2200000	USD
CY2010	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	400000	USD
CY2011	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	3100000	USD
CY2010	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	44200000	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	872800000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	1070800000	USD
CY2010Q4	us-gaap	Stockholders Equity StockholdersEquity	888700000	USD
CY2009Q4	us-gaap	Stockholders Equity StockholdersEquity	870300000	USD
CY2011Q4	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	1300000	USD
CY2012Q4	us-gaap	Tax Credit Carryforward Amount TaxCreditCarryforwardAmount	29800000	USD
CY2012Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	3100000	USD
CY2011Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	2600000	USD
CY2011Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	1724606	shares
CY2012Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	1724606	shares
CY2010Q1	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	1151900	shares
CY2012Q4	us-gaap	Treasury Stock Value TreasuryStockValue	72300000	USD
CY2011Q4	us-gaap	Treasury Stock Value TreasuryStockValue	72300000	USD
CY2010Q1	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	44200000	USD
CY2012Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	200000	USD
CY2011Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	900000	USD
CY2011	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-25900000	USD
CY2010	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-5600000	USD
CY2012	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	16000000	USD
CY2011Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	13700000	USD
CY2010Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	15000000	USD
CY2009Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	15600000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	15700000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	100000	USD
CY2010	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2011	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	500000	USD
CY2010	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	7500000	USD
CY2011Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	6600000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	0	USD
CY2012	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	900000	USD
CY2010	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	400000	USD
CY2010	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	400000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	400000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	400000	USD
CY2010	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1300000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	100000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	900000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	USD
CY2010	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	1700000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	14600000	USD
CY2012	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>
CY2012	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	-100000	USD
CY2010	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	2100000	USD
CY2011	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	-1300000	USD
CY2010	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19377000	shares
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18979000	shares
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19278000	shares
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18979000	shares
CY2010	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19377000	shares
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19115000	shares
CY2011	us-gaap	Workers Compensation Discount Percent WorkersCompensationDiscountPercent	0.0100
CY2012	us-gaap	Workers Compensation Discount Percent WorkersCompensationDiscountPercent	0.0075
CY2011Q4	kalu	Accrued Annual Veba Contribution AccruedAnnualVebaContribution	0	USD
CY2012Q4	kalu	Accrued Annual Veba Contribution AccruedAnnualVebaContribution	20000000	USD
CY2011Q4	kalu	Accrued Freight AccruedFreight	2400000	USD
CY2012Q4	kalu	Accrued Freight AccruedFreight	2200000	USD
CY2012Q4	kalu	Accrued Interest And Penalty On Unrecognized Tax Benefits Current AccruedInterestAndPenaltyOnUnrecognizedTaxBenefitsCurrent	0	USD
CY2011Q4	kalu	Accrued Interest And Penalty On Unrecognized Tax Benefits Current AccruedInterestAndPenaltyOnUnrecognizedTaxBenefitsCurrent	0	USD
CY2012Q4	kalu	Active Property Plant And Equipment Net ActivePropertyPlantAndEquipmentNet	383300000	USD
CY2011Q4	kalu	Active Property Plant And Equipment Net ActivePropertyPlantAndEquipmentNet	362400000	USD
CY2011	kalu	Actuarial Loss Gain Resulting From Change In Benefit Cost For Plan Participants ActuarialLossGainResultingFromChangeInBenefitCostForPlanParticipants	31400000	USD
CY2012	kalu	Actuarial Loss Gain Resulting From Change In Discount Rates Used To Determine Benefit Obligations ActuarialLossGainResultingFromChangeInDiscountRatesUsedToDetermineBenefitObligations	9700000	USD
CY2011	kalu	Actuarial Loss Gain Resulting From Change In Discount Rates Used To Determine Benefit Obligations ActuarialLossGainResultingFromChangeInDiscountRatesUsedToDetermineBenefitObligations	53500000	USD
CY2011	kalu	Actuarial Loss Gain Resulting From Changes In Actuarial Assumptions ActuarialLossGainResultingFromChangesInActuarialAssumptions	11900000	USD
CY2012	kalu	Fabricated Products Shipments Containing Fixed Price Terms FabricatedProductsShipmentsContainingFixedPriceTerms	178.8	mmlbs
CY2010	kalu	Amortization Of Option Premiums AmortizationOfOptionPremiums	1800000	USD
CY2011	kalu	Amortization Of Option Premiums AmortizationOfOptionPremiums	-1200000	USD
CY2012	kalu	Amortization Of Option Premiums AmortizationOfOptionPremiums	300000	USD
CY2010	kalu	Asset Retirement Obligation Adjustment To Accretion Expense From Revision Of Estimate AssetRetirementObligationAdjustmentToAccretionExpenseFromRevisionOfEstimate	-1100000	USD
CY2012	kalu	Asset Retirement Obligation Adjustment To Accretion Expense From Revision Of Estimate AssetRetirementObligationAdjustmentToAccretionExpenseFromRevisionOfEstimate	300000	USD
CY2011	kalu	Asset Retirement Obligation Adjustment To Accretion Expense From Revision Of Estimate AssetRetirementObligationAdjustmentToAccretionExpenseFromRevisionOfEstimate	0	USD
CY2012Q4	kalu	Call Option Fair Value Assumptions Credit Spread CallOptionFairValueAssumptionsCreditSpread	246	basispoints
CY2012	kalu	Common Stock Held By Union Veba On Which Restriction Was Lifted CommonStockHeldByUnionVebaOnWhichRestrictionWasLifted	2202495	shares
CY2010	kalu	Common Stock Held By Union Veba On Which Restriction Was Lifted CommonStockHeldByUnionVebaOnWhichRestrictionWasLifted	1321485	shares
CY2011	kalu	Common Stock Held By Union Veba On Which Restriction Was Lifted CommonStockHeldByUnionVebaOnWhichRestrictionWasLifted	1321485	shares
CY2012Q4	kalu	Common Stock Owned By Union Veba CommonStockOwnedByUnionVeba	0	USD
CY2011Q4	kalu	Common Stock Owned By Union Veba CommonStockOwnedByUnionVeba	52900000	USD
CY2012Q4	kalu	Constant Maturity Treasury Rate Specified Year One ConstantMaturityTreasuryRateSpecifiedYearOne	P2Y
CY2012Q4	kalu	Constant Maturity Treasury Rate Specified Year Two ConstantMaturityTreasuryRateSpecifiedYearTwo	P3Y
CY2011Q4	kalu	Deferred Tax Assets Operating Loss Carryforwards And Tax Credits DeferredTaxAssetsOperatingLossCarryforwardsAndTaxCredits	375600000	USD
CY2012Q4	kalu	Deferred Tax Assets Operating Loss Carryforwards And Tax Credits DeferredTaxAssetsOperatingLossCarryforwardsAndTaxCredits	342200000	USD
CY2010	kalu	Defined Benefit Plan Net Periodic Benefit Cost And Charges Relating To Other Benefit Plans DefinedBenefitPlanNetPeriodicBenefitCostAndChargesRelatingToOtherBenefitPlans	13100000	USD
CY2011	kalu	Defined Benefit Plan Net Periodic Benefit Cost And Charges Relating To Other Benefit Plans DefinedBenefitPlanNetPeriodicBenefitCostAndChargesRelatingToOtherBenefitPlans	1600000	USD
CY2012	kalu	Defined Benefit Plan Net Periodic Benefit Cost And Charges Relating To Other Benefit Plans DefinedBenefitPlanNetPeriodicBenefitCostAndChargesRelatingToOtherBenefitPlans	-3000000	USD
CY2012Q4	kalu	Environmentalcontingencylossexposureinexcessofaccrualbestestimate Environmentalcontingencylossexposureinexcessofaccrualbestestimate	18700000	USD
CY2012	kalu	Eva Measurement Period EvaMeasurementPeriod	P1Y
CY2012Q4	kalu	Excess Tax Benefit From Employee Restricted Stock Resulting In Net Operating Loss Carry Forwards ExcessTaxBenefitFromEmployeeRestrictedStockResultingInNetOperatingLossCarryForwards	1700000	USD
CY2012Q4	kalu	Expected Period Related To Excess Environmental Costs Over Current Accruals ExpectedPeriodRelatedToExcessEnvironmentalCostsOverCurrentAccruals	P30Y
CY2012Q4	kalu	Expected Period Related To Remediation Expenditures For Environmental Contingencies ExpectedPeriodRelatedToRemediationExpendituresForEnvironmentalContingencies	P30Y
CY2012Q4	kalu	Expected Period Which Unrecognized Tax Benefits Will Be Reduced ExpectedPeriodWhichUnrecognizedTaxBenefitsWillBeReduced	P12M
CY2011	kalu	Export Sales Percentage ExportSalesPercentage	0.14
CY2010	kalu	Export Sales Percentage ExportSalesPercentage	0.13
CY2012	kalu	Export Sales Percentage ExportSalesPercentage	0.18
CY2010	kalu	Fabricated Products Shipments Containing Fixed Price Terms FabricatedProductsShipmentsContainingFixedPriceTerms	97.0	mmlbs
CY2011	kalu	Fabricated Products Shipments Containing Fixed Price Terms FabricatedProductsShipmentsContainingFixedPriceTerms	157.0	mmlbs
CY2011Q4	kalu	Idled Equipment IdledEquipment	5400000	USD
CY2012Q4	kalu	Idled Equipment IdledEquipment	1000000	USD
CY2012	kalu	Increase Decrease In Basic Earnings Per Share Resulting From Adjustment IncreaseDecreaseInBasicEarningsPerShareResultingFromAdjustment	-0.02
CY2010	kalu	Increase Decrease In Basic Earnings Per Share Resulting From Adjustment IncreaseDecreaseInBasicEarningsPerShareResultingFromAdjustment	0.05
CY2010	kalu	Increase Decrease In Diluted Earnings Per Share Resulting From Adjustment IncreaseDecreaseInDilutedEarningsPerShareResultingFromAdjustment	0.05
CY2012	kalu	Increase Decrease In Diluted Earnings Per Share Resulting From Adjustment IncreaseDecreaseInDilutedEarningsPerShareResultingFromAdjustment	-0.02
CY2012	kalu	Increase Decrease In Equity Relating To Sale Of Common Shares Owned By Union Veba IncreaseDecreaseInEquityRelatingToSaleOfCommonSharesOwnedByUnionVeba	67300000	USD
CY2011	kalu	Increase Decrease In Equity Relating To Sale Of Common Shares Owned By Union Veba IncreaseDecreaseInEquityRelatingToSaleOfCommonSharesOwnedByUnionVeba	40500000	USD
CY2012	kalu	Federal Income Tax Provision Benefit Other FederalIncomeTaxProvisionBenefitOther	-67400000	USD
CY2010	kalu	Federal Income Tax Provision Benefit Other FederalIncomeTaxProvisionBenefitOther	-27900000	USD
CY2011	kalu	Federal Income Tax Provision Benefit Other FederalIncomeTaxProvisionBenefitOther	13500000	USD
CY2012	kalu	Fixed Charge Coverage Ratio FixedChargeCoverageRatio	1.1:1.0
CY2011	kalu	Foreign Income Tax Provision Benefit Other ForeignIncomeTaxProvisionBenefitOther	400000	USD
CY2010	kalu	Foreign Income Tax Provision Benefit Other ForeignIncomeTaxProvisionBenefitOther	-400000	USD
CY2012	kalu	Foreign Income Tax Provision Benefit Other ForeignIncomeTaxProvisionBenefitOther	-200000	USD
CY2010	kalu	Increase Decrease In Equity Relating To Sale Of Common Shares Owned By Union Veba IncreaseDecreaseInEquityRelatingToSaleOfCommonSharesOwnedByUnionVeba	32500000	USD
CY2010	kalu	Intercompany Loan IntercompanyLoan	0	USD
CY2011	kalu	Intercompany Loan IntercompanyLoan	0	USD
CY2012	kalu	Intercompany Loan IntercompanyLoan	0	USD
CY2011Q4	kalu	Intercompany Payable Current IntercompanyPayableCurrent	0	USD
CY2012Q4	kalu	Intercompany Payable Current IntercompanyPayableCurrent	0	USD
CY2011Q4	kalu	Intercompany Payable Noncurrent IntercompanyPayableNoncurrent	0	USD
CY2012Q4	kalu	Intercompany Payable Noncurrent IntercompanyPayableNoncurrent	0	USD
CY2011Q4	kalu	Intercompany Receivables Current IntercompanyReceivablesCurrent	0	USD
CY2012Q4	kalu	Intercompany Receivables Current IntercompanyReceivablesCurrent	0	USD
CY2011Q4	kalu	Intercompany Receivables Noncurrent IntercompanyReceivablesNoncurrent	0	USD
CY2012Q4	kalu	Intercompany Receivables Noncurrent IntercompanyReceivablesNoncurrent	0	USD
CY2012Q4	kalu	Investment Percentage In Financial Sector InvestmentPercentageInFinancialSector	0.33
CY2011Q4	kalu	Investment Percentage In Financial Sector InvestmentPercentageInFinancialSector	0.38
CY2011Q4	kalu	Investment Percentage In Industrial Sector InvestmentPercentageInIndustrialSector	0.53
CY2012Q4	kalu	Investment Percentage In Industrial Sector InvestmentPercentageInIndustrialSector	0.61
CY2011Q4	kalu	Investment Percentage In Utilities Sector InvestmentPercentageInUtilitiesSector	0.09
CY2012Q4	kalu	Investment Percentage In Utilities Sector InvestmentPercentageInUtilitiesSector	0.06
CY2012Q4	kalu	Margin Deposits From Counterparties MarginDepositsFromCounterparties	0	USD
CY2011Q4	kalu	Margin Deposits From Counterparties MarginDepositsFromCounterparties	0	USD
CY2012Q4	kalu	Multiemployer Plans Collective Bargaining Arrangement Percentage Of Employers Participants To All Employees MultiemployerPlansCollectiveBargainingArrangementPercentageOfEmployersParticipantsToAllEmployees	0.55
CY2011Q4	kalu	Net Asset In Respect Of Vebas NetAssetInRespectOfVebas	144700000	USD
CY2012Q4	kalu	Net Asset In Respect Of Vebas NetAssetInRespectOfVebas	365900000	USD
CY2012Q4	kalu	Net Liability In Respect Of Veba NetLiabilityInRespectOfVeba	5300000	USD
CY2011Q4	kalu	Net Liability In Respect Of Veba NetLiabilityInRespectOfVeba	20600000	USD
CY2012	kalu	Number Of Companys Major Suppliers NumberOfCompanysMajorSuppliers	5	Suppliers
CY2011Q4	kalu	Option Premiums Paid Current OptionPremiumsPaidCurrent	400000	USD
CY2012Q4	kalu	Option Premiums Paid Current OptionPremiumsPaidCurrent	100000	USD
CY2010	kalu	Other Operating Income Loss OtherOperatingIncomeLoss	4000000	USD
CY2011	kalu	Other Operating Income Loss OtherOperatingIncomeLoss	-200000	USD
CY2012	kalu	Other Operating Income Loss OtherOperatingIncomeLoss	4500000	USD
CY2012Q4	kalu	Option Premiums Paid Non Current OptionPremiumsPaidNonCurrent	0	USD
CY2011Q4	kalu	Option Premiums Paid Non Current OptionPremiumsPaidNonCurrent	100000	USD
CY2011Q4	kalu	Option Premiums Received OptionPremiumsReceived	100000	USD
CY2012Q4	kalu	Option Premiums Received OptionPremiumsReceived	100000	USD
CY2012Q4	kalu	Option Premiums Received Noncurrent OptionPremiumsReceivedNoncurrent	0	USD
CY2011Q4	kalu	Option Premiums Received Noncurrent OptionPremiumsReceivedNoncurrent	100000	USD
CY2012Q4	kalu	Ownership Interest In Subsidiaries OwnershipInterestInSubsidiaries	1.00
CY2011Q4	kalu	Prior Period Balance Sheet Reclassification PriorPeriodBalanceSheetReclassification	600000	USD
CY2012	kalu	Reclassification Relating To Dividends On Unvested Equity Awards ReclassificationRelatingToDividendsOnUnvestedEquityAwards	600000	USD
CY2011	kalu	Reclassification Relating To Dividends On Unvested Equity Awards ReclassificationRelatingToDividendsOnUnvestedEquityAwards	200000	USD
CY2012Q4	kalu	Reorganization Value Per Share ReorganizationValuePerShare	24.02
CY2010Q4	kalu	Reorganization Value Per Share ReorganizationValuePerShare	24.02
CY2011Q4	kalu	Reorganization Value Per Share ReorganizationValuePerShare	24.02
CY2012Q4	kalu	Restricted Common Stock Owned By Union Veba Shares RestrictedCommonStockOwnedByUnionVebaShares	0	shares
CY2011Q4	kalu	Restricted Common Stock Owned By Union Veba Shares RestrictedCommonStockOwnedByUnionVebaShares	2202495	shares
CY2012	kalu	Selling Administrative Research And Development And General Expenses SellingAdministrativeResearchAndDevelopmentAndGeneralExpenses	62200000	USD
CY2011	kalu	Selling Administrative Research And Development And General Expenses SellingAdministrativeResearchAndDevelopmentAndGeneralExpenses	62700000	USD
CY2010	kalu	Selling Administrative Research And Development And General Expenses SellingAdministrativeResearchAndDevelopmentAndGeneralExpenses	67700000	USD
CY2012	kalu	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Granted In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedInPeriodTotalFairValue	13900000	USD
CY2011	kalu	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Granted In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedInPeriodTotalFairValue	12800000	USD
CY2010	kalu	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Granted In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedInPeriodTotalFairValue	10500000	USD
CY2011	kalu	Short Term Incentive Compensation Expense ShortTermIncentiveCompensationExpense	8400000	USD
CY2010	kalu	Short Term Incentive Compensation Expense ShortTermIncentiveCompensationExpense	6800000	USD
CY2012	kalu	Short Term Incentive Compensation Expense ShortTermIncentiveCompensationExpense	14400000	USD
CY2012	kalu	State Income Tax Provision Benefit Other StateIncomeTaxProvisionBenefitOther	-9200000	USD
CY2010	kalu	State Income Tax Provision Benefit Other StateIncomeTaxProvisionBenefitOther	-3400000	USD
CY2011	kalu	State Income Tax Provision Benefit Other StateIncomeTaxProvisionBenefitOther	2000000	USD
CY2012Q4	kalu	Time Period Within Which Companys Recorded Estimate Of Its Obligation May Change TimePeriodWithinWhichCompanysRecordedEstimateOfItsObligationMayChange	P12M
CY2010	kalu	Unrealized Gain Loss On Financial Derivatives UnrealizedGainLossOnFinancialDerivatives	-4900000	USD
CY2012	kalu	Unrealized Gain Loss On Financial Derivatives UnrealizedGainLossOnFinancialDerivatives	800000	USD
CY2011	kalu	Unrealized Gain Loss On Financial Derivatives UnrealizedGainLossOnFinancialDerivatives	4000000	USD
CY2011	kalu	Unrealized Gains Losses On Operational Hedging Activities UnrealizedGainsLossesOnOperationalHedgingActivities	-29900000	USD
CY2010	kalu	Unrealized Gains Losses On Operational Hedging Activities UnrealizedGainsLossesOnOperationalHedgingActivities	-700000	USD
CY2012	kalu	Unrealized Gains Losses On Operational Hedging Activities UnrealizedGainsLossesOnOperationalHedgingActivities	15200000	USD
CY2011Q1	kalu	Unrealized Gains Losses On Operational Hedging Activities UnrealizedGainsLossesOnOperationalHedgingActivities	4300000	USD
CY2011Q2	kalu	Unrealized Gains Losses On Operational Hedging Activities UnrealizedGainsLossesOnOperationalHedgingActivities	-9500000	USD
CY2011Q4	kalu	Unrealized Gains Losses On Operational Hedging Activities UnrealizedGainsLossesOnOperationalHedgingActivities	-7900000	USD
CY2011Q3	kalu	Unrealized Gains Losses On Operational Hedging Activities UnrealizedGainsLossesOnOperationalHedgingActivities	-16800000	USD
CY2012Q2	kalu	Unrealized Gains Losses On Operational Hedging Activities UnrealizedGainsLossesOnOperationalHedgingActivities	-100000	USD
CY2012Q1	kalu	Unrealized Gains Losses On Operational Hedging Activities UnrealizedGainsLossesOnOperationalHedgingActivities	3100000	USD
CY2012Q4	kalu	Unrealized Gains Losses On Operational Hedging Activities UnrealizedGainsLossesOnOperationalHedgingActivities	-100000	USD
CY2012Q3	kalu	Unrealized Gains Losses On Operational Hedging Activities UnrealizedGainsLossesOnOperationalHedgingActivities	12300000	USD
CY2011Q4	kalu	Unrecognized Tax Benefits And Income Tax Penalties And Interest Accrued Noncurrent UnrecognizedTaxBenefitsAndIncomeTaxPenaltiesAndInterestAccruedNoncurrent	13400000	USD
CY2012Q4	kalu	Unrecognized Tax Benefits And Income Tax Penalties And Interest Accrued Noncurrent UnrecognizedTaxBenefitsAndIncomeTaxPenaltiesAndInterestAccruedNoncurrent	15100000	USD
CY2010	kalu	Unrecognized Tax Benefits Currency Translation Adjustment UnrecognizedTaxBenefitsCurrencyTranslationAdjustment	700000	USD
CY2011	kalu	Unrecognized Tax Benefits Currency Translation Adjustment UnrecognizedTaxBenefitsCurrencyTranslationAdjustment	-400000	USD
CY2012	kalu	Unrecognized Tax Benefits Currency Translation Adjustment UnrecognizedTaxBenefitsCurrencyTranslationAdjustment	400000	USD
CY2012Q4	kalu	Weighted Average Credit Adjusted Risk Free Rate WeightedAverageCreditAdjustedRiskFreeRate	0.087
CY2011Q4	kalu	Weighted Average Credit Adjusted Risk Free Rate WeightedAverageCreditAdjustedRiskFreeRate	0.091
CY2010	kalu	Weighted Average Price Per Share Sold By Union Veba WeightedAveragePricePerShareSoldByUnionVeba	39.39
CY2011	kalu	Weighted Average Price Per Share Sold By Union Veba WeightedAveragePricePerShareSoldByUnionVeba	49.58
CY2012	kalu	Weighted Average Price Per Share Sold By Union Veba WeightedAveragePricePerShareSoldByUnionVeba	49.31
CY2011Q4	kalu	Workerscompensationliabilityundiscounted Workerscompensationliabilityundiscounted	24300000	USD
CY2012Q4	kalu	Workerscompensationliabilityundiscounted Workerscompensationliabilityundiscounted	27300000	USD
CY2012	dei	Amendment Flag AmendmentFlag	false
CY2012	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2012	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2012	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2012
CY2012	dei	Document Period End Date DocumentPeriodEndDate	2012-12-31
CY2012	dei	Document Type DocumentType	10-K
CY2012	dei	Entity Central Index Key EntityCentralIndexKey	0000811596
CY2013Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	19313235	shares
CY2012	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2012	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2012Q2	dei	Entity Public Float EntityPublicFloat	974300000	USD
CY2012	dei	Entity Registrant Name EntityRegistrantName	Kaiser Aluminum Corp
CY2012	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2012	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes

Files In Submission

Name	View Source	Status
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0000811596-13-000019-index.html	Edgar Link	pending
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$KALU
KAISER ALUMINUM CORP Stock $kalu

2013 Q1 Form 10-K Financial Statement

#000081159613000019 Filed on February 21, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$KALU KAISER ALUMINUM CORP Stock $kalu

2013 Q1 Form 10-K Financial Statement

#000081159613000019 Filed on February 21, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$KALU
KAISER ALUMINUM CORP Stock $kalu