10-K Filing

CENTURY ALUMINUM CO CIK: 949157 FY 2022

Filing Information

Form Type	10-K
Accession Number	`0000949157-23-000023`
Period End Date	20221231
Filing Date	20230227
Fiscal Year	2022
Fiscal Period	FY
XBRL Instance	cenx-20221231_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 85 Income Statement 75 Cash Flow Statement 131 Stockholders Equity 18 Comprehensive Income 30

Balance Sheet 85 line items

Line Item	Tag	Value	Unit	Period
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$29.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$54.30M	USD	Point-in-time
Restricted cash	`RestrictedCashAndCashEquivalents`	$11.70M	USD	Point-in-time
Restricted cash	`RestrictedCashAndCashEquivalents`	$1.20M	USD	Point-in-time
Accounts receivable - net	`AccountsReceivableNetCurrent`	$66.90M	USD	Point-in-time
Accounts receivable - net	`AccountsReceivableNetCurrent`	$80.60M	USD	Point-in-time
Due from affiliates	`DueFromRelatedPartiesCurrent`	$4.80M	USD	Point-in-time
Due from affiliates	`DueFromRelatedPartiesCurrent`	$8.30M	USD	Point-in-time
Inventories	`InventoryNet`	$425.60M	USD	Point-in-time
Inventories	`InventoryNet`	$398.80M	USD	Point-in-time
Derivative assets	`DerivativeAssetsCurrent`	$34.80M	USD	Point-in-time
Derivative assets	`DerivativeAssetsCurrent`	$127.30M	USD	Point-in-time
Prepaid and other current assets	`PrepaidExpenseAndOtherAssetsCurrent`	$24.50M	USD	Point-in-time
Prepaid and other current assets	`PrepaidExpenseAndOtherAssetsCurrent`	$28.20M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$618.20M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$677.80M	USD	Point-in-time
Property, plant and equipment - net	`PropertyPlantAndEquipmentNet`	$892.50M	USD	Point-in-time
Property, plant and equipment - net	`PropertyPlantAndEquipmentNet`	$744.40M	USD	Point-in-time
Other assets	`OtherAssetsNoncurrent`	$49.80M	USD	Point-in-time
Other assets	`OtherAssetsNoncurrent`	$59.20M	USD	Point-in-time
TOTAL	`Assets`	$1.40B	USD	Point-in-time
TOTAL	`Assets`	$1.57B	USD	Point-in-time
TOTAL	`Assets`	$1.47B	USD	Point-in-time
Accounts payable, trade	`AccountsPayableTradeCurrent`	$186.50M	USD	Point-in-time
Accounts payable, trade	`AccountsPayableTradeCurrent`	$167.30M	USD	Point-in-time
Due to affiliates	`DueToAffiliateCurrent`	$17.00M	USD	Point-in-time
Due to affiliates	`DueToAffiliateCurrent`	$65.80M	USD	Point-in-time
Accrued and other current liabilities	`AccruedLiabilitiesCurrent`	$62.70M	USD	Point-in-time
Accrued and other current liabilities	`AccruedLiabilitiesCurrent`	$60.70M	USD	Point-in-time
Derivative liabilities	`DerivativeLiabilitiesCurrent`	$9.70M	USD	Point-in-time
Derivative liabilities	`DerivativeLiabilitiesCurrent`	$102.10M	USD	Point-in-time
Accrued employee benefits costs	`PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities`	$9.90M	USD	Point-in-time
Accrued employee benefits costs	`PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities`	$8.90M	USD	Point-in-time
Iceland term facility	`NotesPayableRelatedPartiesClassifiedCurrent`	-	USD	Point-in-time
Iceland term facility	`NotesPayableRelatedPartiesClassifiedCurrent`	$13.30M	USD	Point-in-time
U.S. revolving credit facility	`DebtDomestic`	$63.60M	USD	Point-in-time
U.S. revolving credit facility	`DebtDomestic`	$90.00M	USD	Point-in-time
Iceland revolving credit facility	`DebtForeignCurrent`	$50.00M	USD	Point-in-time
Iceland revolving credit facility	`DebtForeignCurrent`	$35.00M	USD	Point-in-time
Industrial revenue bonds	`IndustrialRevenueBondsCurrent`	$7.80M	USD	Point-in-time
Industrial revenue bonds	`IndustrialRevenueBondsCurrent`	$7.80M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$410.70M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$547.40M	USD	Point-in-time
Senior notes payable	`SeniorLongTermNotes`	$245.80M	USD	Point-in-time
Senior notes payable	`SeniorLongTermNotes`	$246.60M	USD	Point-in-time
Convertible senior notes payable	`ConvertibleLongTermNotesPayable`	$84.40M	USD	Point-in-time
Convertible senior notes payable	`ConvertibleLongTermNotesPayable`	$84.00M	USD	Point-in-time
Grundartangi casthouse debt facility	`SecuredLongTermDebt`	-	USD	Point-in-time
Grundartangi casthouse debt facility	`SecuredLongTermDebt`	$49.40M	USD	Point-in-time
Iceland term facility, net of current portion	`DebtForeignNoncurrent`	-	USD	Point-in-time
Iceland term facility, net of current portion	`DebtForeignNoncurrent`	$1.20M	USD	Point-in-time
Accrued pension benefits costs - less current portion	`DefinedBenefitPensionPlanLiabilitiesNoncurrent`	$44.50M	USD	Point-in-time
Accrued pension benefits costs - less current portion	`DefinedBenefitPensionPlanLiabilitiesNoncurrent`	$28.60M	USD	Point-in-time
Accrued postretirement benefits costs - less current portion	`OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent`	$93.30M	USD	Point-in-time
Accrued postretirement benefits costs - less current portion	`OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent`	$67.60M	USD	Point-in-time
Other liabilities	`OtherLiabilitiesNoncurrent`	$36.00M	USD	Point-in-time
Other liabilities	`OtherLiabilitiesNoncurrent`	$46.30M	USD	Point-in-time
Leases - right of use liabilities	`OperatingLeaseLiabilityNoncurrent`	$22.90M	USD	Point-in-time
Leases - right of use liabilities	`OperatingLeaseLiabilityNoncurrent`	$20.90M	USD	Point-in-time
Due to affiliates - less current portion	`DueToAffiliateNoncurrent`	$21.90M	USD	Point-in-time
Due to affiliates - less current portion	`DueToAffiliateNoncurrent`	$8.30M	USD	Point-in-time
Deferred taxes	`DeferredIncomeTaxLiabilitiesNet`	$103.10M	USD	Point-in-time
Deferred taxes	`DeferredIncomeTaxLiabilitiesNet`	$58.70M	USD	Point-in-time
Total noncurrent liabilities	`LiabilitiesNoncurrent`	$662.00M	USD	Point-in-time
Total noncurrent liabilities	`LiabilitiesNoncurrent`	$601.50M	USD	Point-in-time
COMMITMENTS AND CONTINGENCIES (NOTE 16)	`CommitmentsAndContingencies`	-	USD	Point-in-time
COMMITMENTS AND CONTINGENCIES (NOTE 16)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Preferred stock (Note 8)	`PreferredStockValue`	-	USD	Point-in-time
Preferred stock (Note 8)	`PreferredStockValue`	-	USD	Point-in-time
Common stock (Note 8)	`CommonStockValue`	$1.00M	USD	Point-in-time
Common stock (Note 8)	`CommonStockValue`	$1.00M	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapital`	$2.54B	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapital`	$2.54B	USD	Point-in-time
Treasury stock, at cost	`TreasuryStockValue`	$86.30M	USD	Point-in-time
Treasury stock, at cost	`TreasuryStockValue`	$86.30M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-94.00M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-82.30M	USD	Point-in-time
Accumulated deficit	`RetainedEarningsAccumulatedDeficit`	$-1.96B	USD	Point-in-time
Accumulated deficit	`RetainedEarningsAccumulatedDeficit`	$-1.95B	USD	Point-in-time
Total shareholders equity	`StockholdersEquity`	$675.00M	USD	Point-in-time
Total shareholders equity	`StockholdersEquity`	$546.10M	USD	Point-in-time
Total shareholders equity	`StockholdersEquity`	$399.30M	USD	Point-in-time
Total shareholders equity	`StockholdersEquity`	$421.00M	USD	Point-in-time
TOTAL	`LiabilitiesAndStockholdersEquity`	$1.57B	USD	Point-in-time
TOTAL	`LiabilitiesAndStockholdersEquity`	$1.47B	USD	Point-in-time

Income Statement 75 line items

Line Item	Tag	Value	Unit	Period
Related parties	`RevenueFromRelatedParties`	$1.67B	USD	Annual
Related parties	`RevenueFromRelatedParties`	$1.03B	USD	Annual
Related parties	`RevenueFromRelatedParties`	$1.34B	USD	Annual
Other customers	`OtherOperatingIncome`	$579.60M	USD	Annual
Other customers	`OtherOperatingIncome`	$1.11B	USD	Annual
Other customers	`OtherOperatingIncome`	$875.50M	USD	Annual
Total net sales	`RevenueFromContractWithCustomerExcludingAssessedTax`	$2.78B	USD	Annual
Total net sales	`RevenueFromContractWithCustomerExcludingAssessedTax`	$1.61B	USD	Annual
Total net sales	`RevenueFromContractWithCustomerExcludingAssessedTax`	$2.21B	USD	Annual
Cost of goods sold	`CostOfGoodsAndServicesSold`	$2.73B	USD	Annual
Cost of goods sold	`CostOfGoodsAndServicesSold`	$1.64B	USD	Annual
Cost of goods sold	`CostOfGoodsAndServicesSold`	$2.09B	USD	Annual
Gross profit (loss)	`GrossProfit`	$46.70M	USD	Annual
Gross profit (loss)	`GrossProfit`	$-36.50M	USD	Annual
Gross profit (loss)	`GrossProfit`	$124.20M	USD	Annual
Selling, general and administrative expenses	`SellingGeneralAndAdministrativeExpense`	$57.60M	USD	Annual
Selling, general and administrative expenses	`SellingGeneralAndAdministrativeExpense`	$37.50M	USD	Annual
Selling, general and administrative expenses	`SellingGeneralAndAdministrativeExpense`	$43.50M	USD	Annual
Asset impairment	`AssetImpairmentCharges`	-	USD	Annual
Asset impairment	`AssetImpairmentCharges`	-	USD	Annual
Asset impairment	`AssetImpairmentCharges`	$159.40M	USD	Annual
Other operating expense - net	`OtherOperatingIncomeExpenseNet`	$-500.00K	USD	Annual
Other operating expense - net	`OtherOperatingIncomeExpenseNet`	$-600.00K	USD	Annual
Other operating expense - net	`OtherOperatingIncomeExpenseNet`	-	USD	Annual
Operating income (loss)	`OperatingIncomeLoss`	$66.00M	USD	Annual
Operating income (loss)	`OperatingIncomeLoss`	$-80.50M	USD	Annual
Operating income (loss)	`OperatingIncomeLoss`	$-150.20M	USD	Annual
Interest expense Hawesville term loan	`InterestExpenseRelatedParty`	$1.90M	USD	Annual
Interest expense Hawesville term loan	`InterestExpenseRelatedParty`	-	USD	Annual
Interest expense Hawesville term loan	`InterestExpenseRelatedParty`	$1.60M	USD	Annual
Interest expense	`InterestExpenseDebt`	$29.30M	USD	Annual
Interest expense	`InterestExpenseDebt`	$29.70M	USD	Annual
Interest expense	`InterestExpenseDebt`	$28.80M	USD	Annual
Interest income	`InterestIncomeOther`	$800.00K	USD	Annual
Interest income	`InterestIncomeOther`	$500.00K	USD	Annual
Interest income	`InterestIncomeOther`	$800.00K	USD	Annual
Net gain (loss) on forward and derivative contracts	`GainLossOnDerivativeInstrumentsNetPretax`	$-212.40M	USD	Annual
Net gain (loss) on forward and derivative contracts	`GainLossOnDerivativeInstrumentsNetPretax`	$-17.30M	USD	Annual
Net gain (loss) on forward and derivative contracts	`GainLossOnDerivativeInstrumentsNetPretax`	$197.10M	USD	Annual
Loss on early extinguishment of debt	`GainsLossesOnExtinguishmentOfDebt`	-	USD	Annual
Loss on early extinguishment of debt	`GainsLossesOnExtinguishmentOfDebt`	$-24.70M	USD	Annual
Loss on early extinguishment of debt	`GainsLossesOnExtinguishmentOfDebt`	$-1.20M	USD	Annual
Other income - net	`OtherNonoperatingIncomeExpense`	$3.50M	USD	Annual
Other income - net	`OtherNonoperatingIncomeExpense`	$15.30M	USD	Annual
Other income - net	`OtherNonoperatingIncomeExpense`	$3.10M	USD	Annual
Income (loss) before income taxes and equity in earnings of joint ventures	`IncomeLossBeforeIncomeTaxesAndEquityMethodInvestmentsInNoncontrollingInterest`	$33.40M	USD	Annual
Income (loss) before income taxes and equity in earnings of joint ventures	`IncomeLossBeforeIncomeTaxesAndEquityMethodInvestmentsInNoncontrollingInterest`	$-126.30M	USD	Annual
Income (loss) before income taxes and equity in earnings of joint ventures	`IncomeLossBeforeIncomeTaxesAndEquityMethodInvestmentsInNoncontrollingInterest`	$-197.60M	USD	Annual
Income tax (expense) benefit	`IncomeTaxExpenseBenefit`	$47.40M	USD	Annual
Income tax (expense) benefit	`IncomeTaxExpenseBenefit`	$-30.60M	USD	Annual
Income tax (expense) benefit	`IncomeTaxExpenseBenefit`	$-3.10M	USD	Annual
Loss before equity in earnings of joint ventures	`IncomeLossAfterIncomeTaxesBeforeIncomeLossFromEquityMethodInvestments`	$-14.00M	USD	Annual
Loss before equity in earnings of joint ventures	`IncomeLossAfterIncomeTaxesBeforeIncomeLossFromEquityMethodInvestments`	$-123.20M	USD	Annual
Loss before equity in earnings of joint ventures	`IncomeLossAfterIncomeTaxesBeforeIncomeLossFromEquityMethodInvestments`	$-167.00M	USD	Annual
Equity in losses of joint ventures	`IncomeLossFromEquityMethodInvestments`	$-100.00K	USD	Annual
Equity in losses of joint ventures	`IncomeLossFromEquityMethodInvestments`	$-100.00K	USD	Annual
Equity in losses of joint ventures	`IncomeLossFromEquityMethodInvestments`	$-100.00K	USD	Annual
Net loss	`NetIncomeLoss`	$-14.10M	USD	Annual
Net loss	`NetIncomeLoss`	$-123.30M	USD	Annual
Net loss	`NetIncomeLoss`	$-167.10M	USD	Annual
Net income (loss) allocated to common stockholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$-123.30M	USD	Annual
Net income (loss) allocated to common stockholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$-167.10M	USD	Annual
Net income (loss) allocated to common stockholders	`NetIncomeLossAvailableToCommonStockholdersBasic`	$-14.10M	USD	Annual
Basic (in dollars per share)	`EarningsPerShareBasic`	$-0.15	USD	Annual
Basic (in dollars per share)	`EarningsPerShareBasic`	$-1.85	USD	Annual
Basic (in dollars per share)	`EarningsPerShareBasic`	$-1.38	USD	Annual
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$-0.15	USD	Annual
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$-1.85	USD	Annual
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$-1.38	USD	Annual
Basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	90.20M	shares	Annual
Basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	89.50M	shares	Annual
Basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	91.40M	shares	Annual
Diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	89.50M	shares	Annual
Diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	91.40M	shares	Annual
Diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	90.20M	shares	Annual

Cash Flow Statement 131 line items

Line Item	Tag	Value	Unit	Period
Net loss	`NetIncomeLoss`	$-14.10M	USD	Annual
Net loss	`NetIncomeLoss`	$-123.30M	USD	Annual
Net loss	`NetIncomeLoss`	$-167.10M	USD	Annual
Lower of cost or NRV inventory adjustment	`InventoryWriteDown`	$39.60M	USD	Annual
Lower of cost or NRV inventory adjustment	`InventoryWriteDown`	$45.00M	USD	Annual
Lower of cost or NRV inventory adjustment	`InventoryWriteDown`	-	USD	Annual
(Gain) loss on derivative instruments	`UnrealizedGainLossOnDerivatives`	$201.50M	USD	Annual
(Gain) loss on derivative instruments	`UnrealizedGainLossOnDerivatives`	$-15.70M	USD	Annual
(Gain) loss on derivative instruments	`UnrealizedGainLossOnDerivatives`	$-102.90M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$73.40M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$83.00M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$82.60M	USD	Annual
Change in deferred tax provision (benefit)	`DeferredIncomeTaxesAndTaxCredits`	$-30.60M	USD	Annual
Change in deferred tax provision (benefit)	`DeferredIncomeTaxesAndTaxCredits`	-	USD	Annual
Change in deferred tax provision (benefit)	`DeferredIncomeTaxesAndTaxCredits`	$44.20M	USD	Annual
Asset impairment	`AssetImpairmentCharges`	-	USD	Annual
Asset impairment	`AssetImpairmentCharges`	-	USD	Annual
Asset impairment	`AssetImpairmentCharges`	$159.40M	USD	Annual
OPEB curtailment gain	`OtherPostretirementBenefitsExpenseReversalOfExpenseNoncash`	$-8.90M	USD	Annual
OPEB curtailment gain	`OtherPostretirementBenefitsExpenseReversalOfExpenseNoncash`	-	USD	Annual
OPEB curtailment gain	`OtherPostretirementBenefitsExpenseReversalOfExpenseNoncash`	-	USD	Annual
Loss on early extinguishment of debt	`GainLossOnExtinguishmentOfDebtNet`	-	USD	Annual
Loss on early extinguishment of debt	`GainLossOnExtinguishmentOfDebtNet`	$-24.70M	USD	Annual
Loss on early extinguishment of debt	`GainLossOnExtinguishmentOfDebtNet`	$-1.00M	USD	Annual
Other non-cash items - net	`OtherOperatingActivitiesCashFlowStatement`	$-1.70M	USD	Annual
Other non-cash items - net	`OtherOperatingActivitiesCashFlowStatement`	$-900.00K	USD	Annual
Other non-cash items - net	`OtherOperatingActivitiesCashFlowStatement`	$-22.80M	USD	Annual
Accounts receivable - net	`IncreaseDecreaseInAccountsReceivable`	$16.20M	USD	Annual
Accounts receivable - net	`IncreaseDecreaseInAccountsReceivable`	$-13.70M	USD	Annual
Accounts receivable - net	`IncreaseDecreaseInAccountsReceivable`	$-19.10M	USD	Annual
Due from affiliates	`IncreaseDecreaseInDueFromRelatedPartiesCurrent`	$-20.80M	USD	Annual
Due from affiliates	`IncreaseDecreaseInDueFromRelatedPartiesCurrent`	$-700.00K	USD	Annual
Due from affiliates	`IncreaseDecreaseInDueFromRelatedPartiesCurrent`	$-3.60M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$134.50M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$15.50M	USD	Annual
Inventories	`IncreaseDecreaseInInventories`	$12.80M	USD	Annual
Prepaid and other current assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$-5.60M	USD	Annual
Prepaid and other current assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$13.40M	USD	Annual
Prepaid and other current assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$-600.00K	USD	Annual
Accounts payable, trade	`IncreaseDecreaseInAccountsPayableTrade`	$20.60M	USD	Annual
Accounts payable, trade	`IncreaseDecreaseInAccountsPayableTrade`	$-15.80M	USD	Annual
Accounts payable, trade	`IncreaseDecreaseInAccountsPayableTrade`	$44.80M	USD	Annual
Due to affiliates	`IncreaseDecreaseInDueToRelatedPartiesCurrent`	$38.30M	USD	Annual
Due to affiliates	`IncreaseDecreaseInDueToRelatedPartiesCurrent`	$-22.40M	USD	Annual
Due to affiliates	`IncreaseDecreaseInDueToRelatedPartiesCurrent`	$-43.50M	USD	Annual
Accrued and other current liabilities	`IncreaseDecreaseInAccruedLiabilities`	$-1.20M	USD	Annual
Accrued and other current liabilities	`IncreaseDecreaseInAccruedLiabilities`	$5.00M	USD	Annual
Accrued and other current liabilities	`IncreaseDecreaseInAccruedLiabilities`	$8.80M	USD	Annual
Ravenswood retiree legal settlement	`IncreaseDecreaseinEstimatedLitigationLiability`	$-2.00M	USD	Annual
Ravenswood retiree legal settlement	`IncreaseDecreaseinEstimatedLitigationLiability`	$-2.00M	USD	Annual
Ravenswood retiree legal settlement	`IncreaseDecreaseinEstimatedLitigationLiability`	$-2.00M	USD	Annual
Ravenswood PBGC settlement	`PensionExpenseReversalOfExpenseNoncash`	-	USD	Annual
Ravenswood PBGC settlement	`PensionExpenseReversalOfExpenseNoncash`	$-2.40M	USD	Annual
Ravenswood PBGC settlement	`PensionExpenseReversalOfExpenseNoncash`	-	USD	Annual
Other - net	`IncreaseDecreaseInOtherOperatingCapitalNet`	$-1.40M	USD	Annual
Other - net	`IncreaseDecreaseInOtherOperatingCapitalNet`	$-2.40M	USD	Annual
Other - net	`IncreaseDecreaseInOtherOperatingCapitalNet`	$-1.80M	USD	Annual
Net cash provided by (used in) operating activities	`NetCashProvidedByUsedInOperatingActivities`	$25.90M	USD	Annual
Net cash provided by (used in) operating activities	`NetCashProvidedByUsedInOperatingActivities`	$-64.70M	USD	Annual
Net cash provided by (used in) operating activities	`NetCashProvidedByUsedInOperatingActivities`	$42.90M	USD	Annual
Purchase of property, plant and equipment	`PaymentsToAcquirePropertyPlantAndEquipment`	$13.40M	USD	Annual
Purchase of property, plant and equipment	`PaymentsToAcquirePropertyPlantAndEquipment`	$83.00M	USD	Annual
Purchase of property, plant and equipment	`PaymentsToAcquirePropertyPlantAndEquipment`	$86.30M	USD	Annual
Proceeds from sale of property, plant and equipment	`ProceedsFromSaleOfPropertyPlantAndEquipment`	$800.00K	USD	Annual
Proceeds from sale of property, plant and equipment	`ProceedsFromSaleOfPropertyPlantAndEquipment`	$1.60M	USD	Annual
Proceeds from sale of property, plant and equipment	`ProceedsFromSaleOfPropertyPlantAndEquipment`	$400.00K	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-85.50M	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-82.60M	USD	Annual
Net cash used in investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-11.80M	USD	Annual
Repayment of Senior Notes due 2021	`RepaymentsOfDebt`	$250.00M	USD	Annual
Repayment of Senior Notes due 2021	`RepaymentsOfDebt`	-	USD	Annual
Repayment of Senior Notes due 2021	`RepaymentsOfDebt`	-	USD	Annual
Proceeds from issuance of Senior Notes due 2025	`ProceedsFromIssuanceOfDebt`	-	USD	Annual
Proceeds from issuance of Senior Notes due 2025	`ProceedsFromIssuanceOfDebt`	$243.80M	USD	Annual
Proceeds from issuance of Senior Notes due 2025	`ProceedsFromIssuanceOfDebt`	-	USD	Annual
Repayment of Senior Notes due 2025	`RepaymentsOfSeniorDebt`	-	USD	Annual
Repayment of Senior Notes due 2025	`RepaymentsOfSeniorDebt`	$250.00M	USD	Annual
Repayment of Senior Notes due 2025	`RepaymentsOfSeniorDebt`	-	USD	Annual
Early redemption and tender premiums paid	`PaymentsOfDebtExtinguishmentCosts`	-	USD	Annual
Early redemption and tender premiums paid	`PaymentsOfDebtExtinguishmentCosts`	$18.10M	USD	Annual
Early redemption and tender premiums paid	`PaymentsOfDebtExtinguishmentCosts`	-	USD	Annual
Proceeds from issuance of Senior Notes due 2028	`ProceedsFromIssuanceOfSeniorLongTermDebt`	$250.00M	USD	Annual
Proceeds from issuance of Senior Notes due 2028	`ProceedsFromIssuanceOfSeniorLongTermDebt`	-	USD	Annual
Proceeds from issuance of Senior Notes due 2028	`ProceedsFromIssuanceOfSeniorLongTermDebt`	-	USD	Annual
Proceeds from issuance of Convertible Senior Notes	`ProceedsFromConvertibleDebt`	$86.30M	USD	Annual
Proceeds from issuance of Convertible Senior Notes	`ProceedsFromConvertibleDebt`	-	USD	Annual
Proceeds from issuance of Convertible Senior Notes	`ProceedsFromConvertibleDebt`	-	USD	Annual
Repayments under Hawesville Term Loan	`RepaymentsOfTermLoan`	$20.00M	USD	Annual
Repayments under Hawesville Term Loan	`RepaymentsOfTermLoan`	$20.00M	USD	Annual
Repayments under Hawesville Term Loan	`RepaymentsOfTermLoan`	-	USD	Annual
Repayments under revolving credit facilities	`RepaymentsOfLinesOfCredit`	$910.20M	USD	Annual
Repayments under revolving credit facilities	`RepaymentsOfLinesOfCredit`	$217.90M	USD	Annual
Repayments under revolving credit facilities	`RepaymentsOfLinesOfCredit`	$1.11B	USD	Annual
Debt issuance cost	`PaymentsOfDebtIssuanceCosts`	$7.40M	USD	Annual
Debt issuance cost	`PaymentsOfDebtIssuanceCosts`	$1.10M	USD	Annual
Debt issuance cost	`PaymentsOfDebtIssuanceCosts`	$1.50M	USD	Annual
Debt retirement cost	`PaymentOfDebtRetirementCostsNet`	-	USD	Annual
Debt retirement cost	`PaymentOfDebtRetirementCostsNet`	$200.00K	USD	Annual
Debt retirement cost	`PaymentOfDebtRetirementCostsNet`	-	USD	Annual
Purchase of capped calls related to Convertible Senior Notes	`PaymentForOptionIndexedToIssuersEquity`	-	USD	Annual
Purchase of capped calls related to Convertible Senior Notes	`PaymentForOptionIndexedToIssuersEquity`	$5.70M	USD	Annual
Purchase of capped calls related to Convertible Senior Notes	`PaymentForOptionIndexedToIssuersEquity`	-	USD	Annual
Borrowings under debt facilities	`ProceedsFromIssuanceOfSecuredDebt`	$50.00M	USD	Annual
Borrowings under debt facilities	`ProceedsFromIssuanceOfSecuredDebt`	-	USD	Annual
Borrowings under debt facilities	`ProceedsFromIssuanceOfSecuredDebt`	-	USD	Annual
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$13.50M	USD	Annual
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$74.40M	USD	Annual
Net cash provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$103.70M	USD	Annual
CHANGE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$-43.60M	USD	Annual
CHANGE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$14.80M	USD	Annual
CHANGE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$44.60M	USD	Annual
Cash, cash equivalents and restricted cash, beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$39.70M	USD	Point-in-time
Cash, cash equivalents and restricted cash, beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$40.70M	USD	Point-in-time
Cash, cash equivalents and restricted cash, beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$55.50M	USD	Point-in-time
Cash, cash equivalents and restricted cash, beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$84.30M	USD	Point-in-time
Cash, cash equivalents and restricted cash, end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$39.70M	USD	Point-in-time
Cash, cash equivalents and restricted cash, end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$40.70M	USD	Point-in-time
Cash, cash equivalents and restricted cash, end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$55.50M	USD	Point-in-time
Cash, cash equivalents and restricted cash, end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$84.30M	USD	Point-in-time
Interest	`InterestPaidNet`	$14.50M	USD	Annual
Interest	`InterestPaidNet`	$36.80M	USD	Annual
Interest	`InterestPaidNet`	$27.00M	USD	Annual
Taxes, net of refunds	`IncomeTaxesPaid`	$3.10M	USD	Annual
Taxes, net of refunds	`IncomeTaxesPaid`	$200.00K	USD	Annual
Taxes, net of refunds	`IncomeTaxesPaid`	$900.00K	USD	Annual
Capital expenditures	`CapitalExpendituresIncurredButNotYetPaid`	$7.10M	USD	Annual
Capital expenditures	`CapitalExpendituresIncurredButNotYetPaid`	$3.70M	USD	Annual
Capital expenditures	`CapitalExpendituresIncurredButNotYetPaid`	$900.00K	USD	Annual
Capitalized interest	`InterestPaidCapitalized`	$1.60M	USD	Annual
Capitalized interest	`InterestPaidCapitalized`	$4.20M	USD	Annual
Capitalized interest	`InterestPaidCapitalized`	-	USD	Annual

Stockholders Equity 18 line items

Line Item	Tag	Value	Unit	Period
Balance, start	`StockholdersEquity`	$675.00M	USD	Point-in-time
Balance, start	`StockholdersEquity`	$546.10M	USD	Point-in-time
Balance, start	`StockholdersEquity`	$399.30M	USD	Point-in-time
Balance, start	`StockholdersEquity`	$421.00M	USD	Point-in-time
Net loss	`NetIncomeLoss`	$-14.10M	USD	Annual
Net loss	`NetIncomeLoss`	$-123.30M	USD	Annual
Net loss	`NetIncomeLoss`	$-167.10M	USD	Annual
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$36.50M	USD	Annual
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-11.70M	USD	Annual
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-8.90M	USD	Annual
Share-based compensation	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$3.50M	USD	Annual
Share-based compensation	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$10.10M	USD	Annual
Share-based compensation	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$4.10M	USD	Annual
Capped call premiums	`AdjustmentsToAdditionalPaidInCapitalOptionIndexedToIssuersEquityCappedCallPremium`	$4.60M	USD	Annual
Balance, end	`StockholdersEquity`	$675.00M	USD	Point-in-time
Balance, end	`StockholdersEquity`	$546.10M	USD	Point-in-time
Balance, end	`StockholdersEquity`	$399.30M	USD	Point-in-time
Balance, end	`StockholdersEquity`	$421.00M	USD	Point-in-time

Comprehensive Income 30 line items

Line Item	Tag	Value	Unit	Period
Net loss	`NetIncomeLoss`	$-14.10M	USD	Annual
Net loss	`NetIncomeLoss`	$-123.30M	USD	Annual
Net loss	`NetIncomeLoss`	$-167.10M	USD	Annual
Net loss on foreign currency cash flow hedges reclassified as income	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax`	$-200.00K	USD	Annual
Net loss on foreign currency cash flow hedges reclassified as income	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax`	$-100.00K	USD	Annual
Net loss on foreign currency cash flow hedges reclassified as income	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax`	$-200.00K	USD	Annual
Net (loss) gain arising during the period	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax`	$-5.90M	USD	Annual
Net (loss) gain arising during the period	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax`	$-13.40M	USD	Annual
Net (loss) gain arising during the period	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax`	$31.60M	USD	Annual
OPEB curtailment gain	`OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationBeforeTax`	-	USD	Annual
OPEB curtailment gain	`OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationBeforeTax`	-	USD	Annual
OPEB curtailment gain	`OtherComprehensiveIncomeLossFinalizationOfPensionAndNonPensionPostretirementPlanValuationBeforeTax`	$-8.90M	USD	Annual
Amortization of prior service benefit during the period	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax`	$-3.10M	USD	Annual
Amortization of prior service benefit during the period	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax`	$-3.00M	USD	Annual
Amortization of prior service benefit during the period	`OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax`	$-1.20M	USD	Annual
Amortization of net loss during the period	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax`	$-4.80M	USD	Annual
Amortization of net loss during the period	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax`	$-8.70M	USD	Annual
Amortization of net loss during the period	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax`	$-8.40M	USD	Annual
Other comprehensive (loss) income before income tax effect	`OtherComprehensiveIncomeLossBeforeTax`	$36.80M	USD	Annual
Other comprehensive (loss) income before income tax effect	`OtherComprehensiveIncomeLossBeforeTax`	$-11.40M	USD	Annual
Other comprehensive (loss) income before income tax effect	`OtherComprehensiveIncomeLossBeforeTax`	$-7.90M	USD	Annual
Income tax effect	`OtherComprehensiveIncomeLossTax`	$300.00K	USD	Annual
Income tax effect	`OtherComprehensiveIncomeLossTax`	$1.00M	USD	Annual
Income tax effect	`OtherComprehensiveIncomeLossTax`	$300.00K	USD	Annual
Other comprehensive (loss) income	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$36.50M	USD	Annual
Other comprehensive (loss) income	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-11.70M	USD	Annual
Other comprehensive (loss) income	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-8.90M	USD	Annual
Total comprehensive loss	`ComprehensiveIncomeNetOfTax`	$-132.20M	USD	Annual
Total comprehensive loss	`ComprehensiveIncomeNetOfTax`	$-130.60M	USD	Annual
Total comprehensive loss	`ComprehensiveIncomeNetOfTax`	$-25.80M	USD	Annual

Data is extracted from SEC EDGAR XBRL filings. Values shown are as reported in the filing.