10-K Filing

ALCOA CORP CIK: 1675149 FY 2019

Filing Information

Form Type	10-K
Accession Number	`0001564590-20-005759`
Period End Date	20191231
Filing Date	20200221
Fiscal Year	2019
Fiscal Period	FY
XBRL Instance	aa-10k_20191231_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 78 Income Statement 88 Cash Flow Statement 117 Stockholders Equity 38 Comprehensive Income 70

Balance Sheet 78 line items

Line Item	Tag	Value	Unit	Period
Cash and cash equivalents (O)	`CashAndCashEquivalentsAtCarryingValue`	$1.11B	USD	Point-in-time
Cash and cash equivalents (O)	`CashAndCashEquivalentsAtCarryingValue`	$879.00M	USD	Point-in-time
Receivables from customers	`AccountsReceivableNetCurrent`	$830.00M	USD	Point-in-time
Receivables from customers	`AccountsReceivableNetCurrent`	$546.00M	USD	Point-in-time
Other receivables	`OtherReceivablesNetCurrent`	$114.00M	USD	Point-in-time
Other receivables	`OtherReceivablesNetCurrent`	$173.00M	USD	Point-in-time
Inventories (I)	`InventoryNet`	$1.64B	USD	Point-in-time
Inventories (I)	`InventoryNet`	$1.82B	USD	Point-in-time
Fair value of derivative instruments (O)	`DerivativeAssetsCurrent`	$59.00M	USD	Point-in-time
Fair value of derivative instruments (O)	`DerivativeAssetsCurrent`	$73.00M	USD	Point-in-time
Prepaid expenses and other current assets (I)	`PrepaidExpenseAndOtherAssetsCurrent`	$320.00M	USD	Point-in-time
Prepaid expenses and other current assets (I)	`PrepaidExpenseAndOtherAssetsCurrent`	$288.00M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$4.33B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$3.53B	USD	Point-in-time
Properties, plants, and equipment, net (J)	`PropertyPlantAndEquipmentNet`	$7.92B	USD	Point-in-time
Properties, plants, and equipment, net (J)	`PropertyPlantAndEquipmentNet`	$8.33B	USD	Point-in-time
Investments (H)	`InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures`	$1.11B	USD	Point-in-time
Investments (H)	`InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures`	$1.36B	USD	Point-in-time
Deferred income taxes (P)	`DeferredTaxAssetsNetNoncurrent`	$560.00M	USD	Point-in-time
Deferred income taxes (P)	`DeferredTaxAssetsNetNoncurrent`	$642.00M	USD	Point-in-time
Fair value of derivative instruments (O)	`DerivativeAssetsNoncurrent`	$18.00M	USD	Point-in-time
Fair value of derivative instruments (O)	`DerivativeAssetsNoncurrent`	$82.00M	USD	Point-in-time
Other noncurrent assets (T)	`OtherAssetsNoncurrent`	$1.48B	USD	Point-in-time
Other noncurrent assets (T)	`OtherAssetsNoncurrent`	$1.41B	USD	Point-in-time
Total Assets	`Assets`	$14.63B	USD	Point-in-time
Total Assets	`Assets`	$16.13B	USD	Point-in-time
Accounts payable, trade	`AccountsPayableCurrent`	$1.66B	USD	Point-in-time
Accounts payable, trade	`AccountsPayableCurrent`	$1.48B	USD	Point-in-time
Accrued compensation and retirement costs	`EmployeeRelatedLiabilitiesCurrent`	$400.00M	USD	Point-in-time
Accrued compensation and retirement costs	`EmployeeRelatedLiabilitiesCurrent`	$413.00M	USD	Point-in-time
Taxes, including income taxes	`TaxesPayableCurrent`	$426.00M	USD	Point-in-time
Taxes, including income taxes	`TaxesPayableCurrent`	$104.00M	USD	Point-in-time
Fair value of derivative instruments (O)	`DerivativeLiabilitiesCurrent`	$67.00M	USD	Point-in-time
Fair value of derivative instruments (O)	`DerivativeLiabilitiesCurrent`	$82.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$347.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$494.00M	USD	Point-in-time
Long-term debt due within one year (L & O)	`LongTermDebtAndCapitalLeaseObligationsCurrent`	$1.00M	USD	Point-in-time
Long-term debt due within one year (L & O)	`LongTermDebtAndCapitalLeaseObligationsCurrent`	$1.00M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$2.92B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$2.56B	USD	Point-in-time
Long-term debt, less amount due within one year (L & O)	`LongTermDebtAndCapitalLeaseObligations`	$1.80B	USD	Point-in-time
Long-term debt, less amount due within one year (L & O)	`LongTermDebtAndCapitalLeaseObligations`	$1.80B	USD	Point-in-time
Accrued pension benefits (N)	`DefinedBenefitPensionPlanLiabilitiesNoncurrent`	$1.41B	USD	Point-in-time
Accrued pension benefits (N)	`DefinedBenefitPensionPlanLiabilitiesNoncurrent`	$1.50B	USD	Point-in-time
Accrued other postretirement benefits (N)	`OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent`	$749.00M	USD	Point-in-time
Accrued other postretirement benefits (N)	`OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent`	$868.00M	USD	Point-in-time
Asset retirement obligations (Q)	`AssetRetirementObligationsNoncurrent`	$606.00M	USD	Point-in-time
Asset retirement obligations (Q)	`AssetRetirementObligationsNoncurrent`	$529.00M	USD	Point-in-time
Environmental remediation (R)	`AccruedEnvironmentalLossContingenciesNoncurrent`	$236.00M	USD	Point-in-time
Environmental remediation (R)	`AccruedEnvironmentalLossContingenciesNoncurrent`	$296.00M	USD	Point-in-time
Fair value of derivative instruments (O)	`DerivativeLiabilitiesNoncurrent`	$581.00M	USD	Point-in-time
Fair value of derivative instruments (O)	`DerivativeLiabilitiesNoncurrent`	$261.00M	USD	Point-in-time
Noncurrent income taxes (P)	`AccruedIncomeTaxesNoncurrent`	$301.00M	USD	Point-in-time
Noncurrent income taxes (P)	`AccruedIncomeTaxesNoncurrent`	$276.00M	USD	Point-in-time
Other noncurrent liabilities and deferred credits (T)	`DeferredCreditsAndOtherLiabilitiesNoncurrent`	$222.00M	USD	Point-in-time
Other noncurrent liabilities and deferred credits (T)	`DeferredCreditsAndOtherLiabilitiesNoncurrent`	$370.00M	USD	Point-in-time
Total liabilities	`Liabilities`	$8.74B	USD	Point-in-time
Total liabilities	`Liabilities`	$8.54B	USD	Point-in-time
Contingencies and commitments (R)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Contingencies and commitments (R)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Common stock (M)	`CommonStockValue`	$2.00M	USD	Point-in-time
Common stock (M)	`CommonStockValue`	$2.00M	USD	Point-in-time
Additional capital	`AdditionalPaidInCapitalCommonStock`	$9.61B	USD	Point-in-time
Additional capital	`AdditionalPaidInCapitalCommonStock`	$9.64B	USD	Point-in-time
Retained (deficit) earnings (I)	`RetainedEarningsAccumulatedDeficit`	$-555.00M	USD	Point-in-time
Retained (deficit) earnings (I)	`RetainedEarningsAccumulatedDeficit`	$570.00M	USD	Point-in-time
Accumulated other comprehensive loss (G)	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-4.97B	USD	Point-in-time
Accumulated other comprehensive loss (G)	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-4.57B	USD	Point-in-time
Total Alcoa Corporation shareholders equity	`StockholdersEquity`	$5.62B	USD	Point-in-time
Total Alcoa Corporation shareholders equity	`StockholdersEquity`	$4.11B	USD	Point-in-time
Noncontrolling interest (A & I)	`MinorityInterest`	$1.97B	USD	Point-in-time
Noncontrolling interest (A & I)	`MinorityInterest`	$1.77B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.59B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.97B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.82B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.89B	USD	Point-in-time
Total Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$14.63B	USD	Point-in-time
Total Liabilities and Equity	`LiabilitiesAndStockholdersEquity`	$16.13B	USD	Point-in-time

Income Statement 88 line items

Line Item	Tag	Value	Unit	Period
Sales (E)	`RevenueFromContractWithCustomerExcludingAssessedTax`	$2.71B	USD	1 Quarter
Sales (E)	`RevenueFromContractWithCustomerExcludingAssessedTax`	$3.58B	USD	1 Quarter
Sales (E)	`RevenueFromContractWithCustomerExcludingAssessedTax`	$3.09B	USD	1 Quarter
Sales (E)	`RevenueFromContractWithCustomerExcludingAssessedTax`	$3.39B	USD	1 Quarter
Sales (E)	`RevenueFromContractWithCustomerExcludingAssessedTax`	$2.72B	USD	1 Quarter
Sales (E)	`RevenueFromContractWithCustomerExcludingAssessedTax`	$2.57B	USD	1 Quarter
Sales (E)	`RevenueFromContractWithCustomerExcludingAssessedTax`	$11.65B	USD	Annual
Sales (E)	`RevenueFromContractWithCustomerExcludingAssessedTax`	$13.40B	USD	Annual
Sales (E)	`RevenueFromContractWithCustomerExcludingAssessedTax`	$3.34B	USD	1 Quarter
Sales (E)	`RevenueFromContractWithCustomerExcludingAssessedTax`	$10.43B	USD	Annual
Sales (E)	`RevenueFromContractWithCustomerExcludingAssessedTax`	$2.44B	USD	1 Quarter
Cost of goods sold (exclusive of expenses below) (I)	`CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization`	$8.95B	USD	Annual
Cost of goods sold (exclusive of expenses below) (I)	`CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization`	$10.05B	USD	Annual
Cost of goods sold (exclusive of expenses below) (I)	`CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization`	$8.54B	USD	Annual
Selling, general administrative, and other expenses	`SellingGeneralAndAdministrativeExpense`	$280.00M	USD	Annual
Selling, general administrative, and other expenses	`SellingGeneralAndAdministrativeExpense`	$248.00M	USD	Annual
Selling, general administrative, and other expenses	`SellingGeneralAndAdministrativeExpense`	$280.00M	USD	Annual
Research and development expenses	`ResearchAndDevelopmentExpense`	$27.00M	USD	Annual
Research and development expenses	`ResearchAndDevelopmentExpense`	$32.00M	USD	Annual
Research and development expenses	`ResearchAndDevelopmentExpense`	$31.00M	USD	Annual
Provision for depreciation, depletion, and amortization	`DepreciationDepletionAndAmortization`	$750.00M	USD	Annual
Provision for depreciation, depletion, and amortization	`DepreciationDepletionAndAmortization`	$713.00M	USD	Annual
Provision for depreciation, depletion, and amortization	`DepreciationDepletionAndAmortization`	$733.00M	USD	Annual
Restructuring and other charges, net (D)	`RestructuringAndOtherCharges`	$527.00M	USD	Annual
Restructuring and other charges, net (D)	`RestructuringAndOtherCharges`	$1.03B	USD	Annual
Restructuring and other charges, net (D)	`RestructuringAndOtherCharges`	$309.00M	USD	Annual
Interest expense (T)	`InterestExpense`	$121.00M	USD	Annual
Interest expense (T)	`InterestExpense`	$104.00M	USD	Annual
Interest expense (T)	`InterestExpense`	$122.00M	USD	Annual
Other expenses, net (T)	`NonoperatingIncomeExpense`	$-162.00M	USD	Annual
Other expenses, net (T)	`NonoperatingIncomeExpense`	$-27.00M	USD	Annual
Other expenses, net (T)	`NonoperatingIncomeExpense`	$-64.00M	USD	Annual
Total costs and expenses	`CostsAndOperatingExpensesAndNonoperatingIncomeExpenses`	$11.78B	USD	Annual
Total costs and expenses	`CostsAndOperatingExpensesAndNonoperatingIncomeExpenses`	$10.87B	USD	Annual
Total costs and expenses	`CostsAndOperatingExpensesAndNonoperatingIncomeExpenses`	$10.45B	USD	Annual
(Loss) income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$-438.00M	USD	Annual
(Loss) income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$1.62B	USD	Annual
(Loss) income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$1.20B	USD	Annual
Provision for income taxes (I & P)	`IncomeTaxExpenseBenefit`	$732.00M	USD	Annual
Provision for income taxes (I & P)	`IncomeTaxExpenseBenefit`	$592.00M	USD	Annual
Provision for income taxes (I & P)	`IncomeTaxExpenseBenefit`	$415.00M	USD	Annual
Net (loss) income (I)	`ProfitLoss`	$893.00M	USD	Annual
Net (loss) income (I)	`ProfitLoss`	$340.00M	USD	1 Quarter
Net (loss) income (I)	`ProfitLoss`	$-853.00M	USD	Annual
Net (loss) income (I)	`ProfitLoss`	$-147.00M	USD	1 Quarter
Net (loss) income (I)	`ProfitLoss`	$-293.00M	USD	1 Quarter
Net (loss) income (I)	`ProfitLoss`	$608.00M	USD	Annual
Net (loss) income (I)	`ProfitLoss`	$-355.00M	USD	1 Quarter
Net (loss) income (I)	`ProfitLoss`	$195.00M	USD	1 Quarter
Net (loss) income (I)	`ProfitLoss`	$131.00M	USD	1 Quarter
Net (loss) income (I)	`ProfitLoss`	$227.00M	USD	1 Quarter
Net (loss) income (I)	`ProfitLoss`	$-58.00M	USD	1 Quarter
Less: Net income attributable to noncontrolling interest (I)	`NetIncomeLossAttributableToNoncontrollingInterest`	$643.00M	USD	Annual
Less: Net income attributable to noncontrolling interest (I)	`NetIncomeLossAttributableToNoncontrollingInterest`	$329.00M	USD	Annual
Less: Net income attributable to noncontrolling interest (I)	`NetIncomeLossAttributableToNoncontrollingInterest`	$272.00M	USD	Annual
Net (loss) income attributable to Alcoa Corporation (I)	`NetIncomeLoss`	$-221.00M	USD	1 Quarter
Net (loss) income attributable to Alcoa Corporation (I)	`NetIncomeLoss`	$250.00M	USD	Annual
Net (loss) income attributable to Alcoa Corporation (I)	`NetIncomeLoss`	$-303.00M	USD	1 Quarter
Net (loss) income attributable to Alcoa Corporation (I)	`NetIncomeLoss`	$-402.00M	USD	1 Quarter
Net (loss) income attributable to Alcoa Corporation (I)	`NetIncomeLoss`	$-6.00M	USD	1 Quarter
Net (loss) income attributable to Alcoa Corporation (I)	`NetIncomeLoss`	$10.00M	USD	1 Quarter
Net (loss) income attributable to Alcoa Corporation (I)	`NetIncomeLoss`	$-199.00M	USD	1 Quarter
Net (loss) income attributable to Alcoa Corporation (I)	`NetIncomeLoss`	$279.00M	USD	Annual
Net (loss) income attributable to Alcoa Corporation (I)	`NetIncomeLoss`	$51.00M	USD	1 Quarter
Net (loss) income attributable to Alcoa Corporation (I)	`NetIncomeLoss`	$-1.12B	USD	Annual
Net (loss) income attributable to Alcoa Corporation (I)	`NetIncomeLoss`	$195.00M	USD	1 Quarter
Basic	`EarningsPerShareBasic`	$-0.03	USD	1 Quarter
Basic	`EarningsPerShareBasic`	$-1.63	USD	1 Quarter
Basic	`EarningsPerShareBasic`	$-2.17	USD	1 Quarter
Basic	`EarningsPerShareBasic`	$-1.19	USD	1 Quarter
Basic	`EarningsPerShareBasic`	$1.05	USD	1 Quarter
Basic	`EarningsPerShareBasic`	$0.27	USD	1 Quarter
Basic	`EarningsPerShareBasic`	$0.05	USD	1 Quarter
Basic	`EarningsPerShareBasic`	$-6.07	USD	Annual
Basic	`EarningsPerShareBasic`	$-1.07	USD	1 Quarter
Basic	`EarningsPerShareBasic`	$1.51	USD	Annual
Basic	`EarningsPerShareBasic`	$1.34	USD	Annual
Diluted	`EarningsPerShareDiluted`	$-0.03	USD	1 Quarter
Diluted	`EarningsPerShareDiluted`	$1.49	USD	Annual
Diluted	`EarningsPerShareDiluted`	$-2.17	USD	1 Quarter
Diluted	`EarningsPerShareDiluted`	$1.33	USD	Annual
Diluted	`EarningsPerShareDiluted`	$-1.63	USD	1 Quarter
Diluted	`EarningsPerShareDiluted`	$0.05	USD	1 Quarter
Diluted	`EarningsPerShareDiluted`	$-1.19	USD	1 Quarter
Diluted	`EarningsPerShareDiluted`	$-6.07	USD	Annual
Diluted	`EarningsPerShareDiluted`	$1.04	USD	1 Quarter
Diluted	`EarningsPerShareDiluted`	$-1.07	USD	1 Quarter
Diluted	`EarningsPerShareDiluted`	$0.27	USD	1 Quarter

Cash Flow Statement 117 line items

Line Item	Tag	Value	Unit	Period
Net (loss) income (I)	`ProfitLoss`	$893.00M	USD	Annual
Net (loss) income (I)	`ProfitLoss`	$340.00M	USD	1 Quarter
Net (loss) income (I)	`ProfitLoss`	$-853.00M	USD	Annual
Net (loss) income (I)	`ProfitLoss`	$-147.00M	USD	1 Quarter
Net (loss) income (I)	`ProfitLoss`	$-293.00M	USD	1 Quarter
Net (loss) income (I)	`ProfitLoss`	$608.00M	USD	Annual
Net (loss) income (I)	`ProfitLoss`	$-355.00M	USD	1 Quarter
Net (loss) income (I)	`ProfitLoss`	$195.00M	USD	1 Quarter
Net (loss) income (I)	`ProfitLoss`	$131.00M	USD	1 Quarter
Net (loss) income (I)	`ProfitLoss`	$227.00M	USD	1 Quarter
Net (loss) income (I)	`ProfitLoss`	$-58.00M	USD	1 Quarter
Depreciation, depletion, and amortization	`OtherDepreciationAndAmortization`	$733.00M	USD	Annual
Depreciation, depletion, and amortization	`OtherDepreciationAndAmortization`	$752.00M	USD	Annual
Depreciation, depletion, and amortization	`OtherDepreciationAndAmortization`	$713.00M	USD	Annual
Deferred income taxes (I & P)	`DeferredIncomeTaxExpenseBenefit`	$15.00M	USD	Annual
Deferred income taxes (I & P)	`DeferredIncomeTaxExpenseBenefit`	$168.00M	USD	Annual
Deferred income taxes (I & P)	`DeferredIncomeTaxExpenseBenefit`	$-30.00M	USD	Annual
Equity earnings, net of dividends (H)	`IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions`	$-9.00M	USD	Annual
Equity earnings, net of dividends (H)	`IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions`	$-17.00M	USD	Annual
Equity earnings, net of dividends (H)	`IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions`	$-21.00M	USD	Annual
Restructuring and other charges, net (D)	`RestructuringAndOtherCharges`	$527.00M	USD	Annual
Restructuring and other charges, net (D)	`RestructuringAndOtherCharges`	$1.03B	USD	Annual
Restructuring and other charges, net (D)	`RestructuringAndOtherCharges`	$309.00M	USD	Annual
Net gain from investing activitiesasset sales (T)	`GainLossOnDispositionOfAssets1`	$3.00M	USD	Annual
Net gain from investing activitiesasset sales (T)	`GainLossOnDispositionOfAssets1`	$116.00M	USD	Annual
Net periodic pension benefit cost (N)	`DefinedBenefitPensionPlansNetPeriodicBenefitCost`	$111.00M	USD	Annual
Net periodic pension benefit cost (N)	`DefinedBenefitPensionPlansNetPeriodicBenefitCost`	$119.00M	USD	Annual
Net periodic pension benefit cost (N)	`DefinedBenefitPensionPlansNetPeriodicBenefitCost`	$146.00M	USD	Annual
Stock-based compensation (M)	`ShareBasedCompensation`	$24.00M	USD	Annual
Stock-based compensation (M)	`ShareBasedCompensation`	$30.00M	USD	Annual
Stock-based compensation (M)	`ShareBasedCompensation`	$35.00M	USD	Annual
Provision for bad debt expense	`ProvisionForDoubtfulAccounts`	$21.00M	USD	Annual
Other	`OtherNoncashIncomeExpense`	$-32.00M	USD	Annual
Other	`OtherNoncashIncomeExpense`	$59.00M	USD	Annual
Other	`OtherNoncashIncomeExpense`	$-30.00M	USD	Annual
Decrease (Increase) in receivables	`IncreaseDecreaseInReceivables`	$118.00M	USD	Annual
Decrease (Increase) in receivables	`IncreaseDecreaseInReceivables`	$43.00M	USD	Annual
Decrease (Increase) in receivables	`IncreaseDecreaseInReceivables`	$-283.00M	USD	Annual
Decrease (Increase) in inventories (I)	`IncreaseDecreaseInInventories`	$-137.00M	USD	Annual
Decrease (Increase) in inventories (I)	`IncreaseDecreaseInInventories`	$279.00M	USD	Annual
Decrease (Increase) in inventories (I)	`IncreaseDecreaseInInventories`	$306.00M	USD	Annual
Decrease (Increase) in prepaid expenses and other current assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$32.00M	USD	Annual
Decrease (Increase) in prepaid expenses and other current assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$-43.00M	USD	Annual
Decrease (Increase) in prepaid expenses and other current assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$-27.00M	USD	Annual
(Decrease) Increase in accounts payable, trade	`IncreaseDecreaseInAccountsPayableTrade`	$-165.00M	USD	Annual
(Decrease) Increase in accounts payable, trade	`IncreaseDecreaseInAccountsPayableTrade`	$377.00M	USD	Annual
(Decrease) Increase in accounts payable, trade	`IncreaseDecreaseInAccountsPayableTrade`	$-153.00M	USD	Annual
(Decrease) in accrued expenses	`IncreaseDecreaseInAccruedLiabilities`	$-175.00M	USD	Annual
(Decrease) in accrued expenses	`IncreaseDecreaseInAccruedLiabilities`	$-563.00M	USD	Annual
(Decrease) in accrued expenses	`IncreaseDecreaseInAccruedLiabilities`	$-319.00M	USD	Annual
(Decrease) Increase in taxes, including income taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$-330.00M	USD	Annual
(Decrease) Increase in taxes, including income taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$111.00M	USD	Annual
(Decrease) Increase in taxes, including income taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$241.00M	USD	Annual
Pension contributions (N)	`PensionContributions`	$992.00M	USD	Annual
Pension contributions (N)	`PensionContributions`	$173.00M	USD	Annual
Pension contributions (N)	`PensionContributions`	$106.00M	USD	Annual
(Increase) in noncurrent assets	`IncreaseDecreaseInOtherNoncurrentAssets`	$99.00M	USD	Annual
(Increase) in noncurrent assets	`IncreaseDecreaseInOtherNoncurrentAssets`	$24.00M	USD	Annual
(Increase) in noncurrent assets	`IncreaseDecreaseInOtherNoncurrentAssets`	$101.00M	USD	Annual
(Decrease) in noncurrent liabilities	`IncreaseDecreaseInOtherNoncurrentLiabilities`	$-30.00M	USD	Annual
(Decrease) in noncurrent liabilities	`IncreaseDecreaseInOtherNoncurrentLiabilities`	$-97.00M	USD	Annual
(Decrease) in noncurrent liabilities	`IncreaseDecreaseInOtherNoncurrentLiabilities`	$-39.00M	USD	Annual
Cash provided from operations	`NetCashProvidedByUsedInOperatingActivities`	$448.00M	USD	Annual
Cash provided from operations	`NetCashProvidedByUsedInOperatingActivities`	$1.22B	USD	Annual
Cash provided from operations	`NetCashProvidedByUsedInOperatingActivities`	$686.00M	USD	Annual
Cash paid to former parent company related to separation (A)	`PaymentForSeparationTransaction`	$1.07B	USD	Point-in-time
Cash paid to former parent company related to separation (A)	`PaymentForSeparationTransaction`	$247.00M	USD	Annual
Net change in short-term borrowings (original maturities of three months or less)	`ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess`	$7.00M	USD	Annual
Additions to debt (original maturities greater than three months) (L)	`ProceedsFromIssuanceOfLongTermDebt`	$21.00M	USD	Annual
Additions to debt (original maturities greater than three months) (L)	`ProceedsFromIssuanceOfLongTermDebt`	$492.00M	USD	Point-in-time
Additions to debt (original maturities greater than three months) (L)	`ProceedsFromIssuanceOfLongTermDebt`	$560.00M	USD	Annual
Payments on debt (original maturities greater than three months) (L)	`RepaymentsOfLongTermDebt`	$7.00M	USD	Annual
Payments on debt (original maturities greater than three months) (L)	`RepaymentsOfLongTermDebt`	$60.00M	USD	Annual
Payments on debt (original maturities greater than three months) (L)	`RepaymentsOfLongTermDebt`	$135.00M	USD	Annual
Proceeds from the exercise of employee stock options (M)	`ProceedsFromStockOptionsExercised`	$2.00M	USD	Annual
Proceeds from the exercise of employee stock options (M)	`ProceedsFromStockOptionsExercised`	$43.00M	USD	Annual
Proceeds from the exercise of employee stock options (M)	`ProceedsFromStockOptionsExercised`	$23.00M	USD	Annual
Repurchase of common stock (M)	`PaymentsForRepurchaseOfCommonStock`	$50.00M	USD	Annual
Financial contributions for the divestiture of businesses (C)	`PaymentsForFinancialContributionsForTheDivestitureOfBusinesses`	$12.00M	USD	Annual
Contributions from noncontrolling interest (A)	`ProceedsFromMinorityShareholders`	$51.00M	USD	Annual
Contributions from noncontrolling interest (A)	`ProceedsFromMinorityShareholders`	$149.00M	USD	Annual
Contributions from noncontrolling interest (A)	`ProceedsFromMinorityShareholders`	$80.00M	USD	Annual
Distributions to noncontrolling interest	`PaymentsOfDividendsMinorityInterest`	$827.00M	USD	Annual
Distributions to noncontrolling interest	`PaymentsOfDividendsMinorityInterest`	$342.00M	USD	Annual
Distributions to noncontrolling interest	`PaymentsOfDividendsMinorityInterest`	$472.00M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-8.00M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-6.00M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-8.00M	USD	Annual
Cash used for financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-506.00M	USD	Annual
Cash used for financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-288.00M	USD	Annual
Cash used for financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-444.00M	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$399.00M	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$405.00M	USD	Annual
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$379.00M	USD	Annual
Proceeds from the sale of assets and businesses (C)	`ProceedsFromSaleOfPropertyPlantAndEquipment`	$23.00M	USD	Annual
Proceeds from the sale of assets and businesses (C)	`ProceedsFromSaleOfPropertyPlantAndEquipment`	$245.00M	USD	Annual
Proceeds from the sale of assets and businesses (C)	`ProceedsFromSaleOfPropertyPlantAndEquipment`	$1.00M	USD	Annual
Additions to investments (H)	`PaymentsToAcquireInvestments`	$7.00M	USD	Annual
Additions to investments (H)	`PaymentsToAcquireInvestments`	$112.00M	USD	Annual
Additions to investments (H)	`PaymentsToAcquireInvestments`	$66.00M	USD	Annual
Cash used for investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-405.00M	USD	Annual
Cash used for investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-468.00M	USD	Annual
Cash used for investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-226.00M	USD	Annual
Effect of exchange rate changes on cash and cash equivalents and restricted cash	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$-7.00M	USD	Annual
Effect of exchange rate changes on cash and cash equivalents and restricted cash	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$14.00M	USD	Annual
Effect of exchange rate changes on cash and cash equivalents and restricted cash	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$-4.00M	USD	Annual
Net change in cash and cash equivalents and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$-233.00M	USD	Annual
Net change in cash and cash equivalents and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$506.00M	USD	Annual
Net change in cash and cash equivalents and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$-249.00M	USD	Annual
Cash and cash equivalents and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$1.36B	USD	Point-in-time
Cash and cash equivalents and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$1.12B	USD	Point-in-time
Cash and cash equivalents and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$859.00M	USD	Point-in-time
Cash and cash equivalents and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$883.00M	USD	Point-in-time
Cash and cash equivalents and restricted cash at end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$1.36B	USD	Point-in-time
Cash and cash equivalents and restricted cash at end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$1.12B	USD	Point-in-time
Cash and cash equivalents and restricted cash at end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$859.00M	USD	Point-in-time
Cash and cash equivalents and restricted cash at end of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$883.00M	USD	Point-in-time

Stockholders Equity 38 line items

Line Item	Tag	Value	Unit	Period
Beginning Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.59B	USD	Point-in-time
Beginning Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.97B	USD	Point-in-time
Beginning Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.82B	USD	Point-in-time
Beginning Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.89B	USD	Point-in-time
Net (loss) income	`ProfitLoss`	$893.00M	USD	Annual
Net (loss) income	`ProfitLoss`	$340.00M	USD	1 Quarter
Net (loss) income	`ProfitLoss`	$-853.00M	USD	Annual
Net (loss) income	`ProfitLoss`	$-147.00M	USD	1 Quarter
Net (loss) income	`ProfitLoss`	$-293.00M	USD	1 Quarter
Net (loss) income	`ProfitLoss`	$608.00M	USD	Annual
Net (loss) income	`ProfitLoss`	$-355.00M	USD	1 Quarter
Net (loss) income	`ProfitLoss`	$195.00M	USD	1 Quarter
Net (loss) income	`ProfitLoss`	$131.00M	USD	1 Quarter
Net (loss) income	`ProfitLoss`	$227.00M	USD	1 Quarter
Net (loss) income	`ProfitLoss`	$-58.00M	USD	1 Quarter
Other comprehensive (loss) income (G)	`OtherComprehensiveIncomeLossNetOfTax`	$-454.00M	USD	Annual
Other comprehensive (loss) income (G)	`OtherComprehensiveIncomeLossNetOfTax`	$369.00M	USD	Annual
Other comprehensive (loss) income (G)	`OtherComprehensiveIncomeLossNetOfTax`	$-1.25B	USD	Annual
Stock-based compensation (M)	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$24.00M	USD	Annual
Stock-based compensation (M)	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$30.00M	USD	Annual
Stock-based compensation (M)	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$35.00M	USD	Annual
Common stock issued: Compensation plans (M)	`StockIssuedDuringPeriodValueShareBasedCompensation`	$2.00M	USD	Annual
Common stock issued: Compensation plans (M)	`StockIssuedDuringPeriodValueShareBasedCompensation`	$23.00M	USD	Annual
Common stock issued: Compensation plans (M)	`StockIssuedDuringPeriodValueShareBasedCompensation`	$43.00M	USD	Annual
Repurchase of common stock (M)	`StockRepurchasedDuringPeriodValue`	$50.00M	USD	Annual
Contributions	`MinorityInterestIncreaseDecreaseFromCapitalContributionFromNoncontrollingInterestHolders`	$51.00M	USD	Annual
Contributions	`MinorityInterestIncreaseDecreaseFromCapitalContributionFromNoncontrollingInterestHolders`	$149.00M	USD	Annual
Contributions	`MinorityInterestIncreaseDecreaseFromCapitalContributionFromNoncontrollingInterestHolders`	$80.00M	USD	Annual
Distributions	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$472.00M	USD	Annual
Distributions	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$342.00M	USD	Annual
Distributions	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$827.00M	USD	Annual
Other	`StockholdersEquityOther`	$11.00M	USD	Annual
Other	`StockholdersEquityOther`	$-28.00M	USD	Annual
Other	`StockholdersEquityOther`	$6.00M	USD	Annual
Ending Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.59B	USD	Point-in-time
Ending Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.97B	USD	Point-in-time
Ending Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.82B	USD	Point-in-time
Ending Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.89B	USD	Point-in-time

Comprehensive Income 70 line items

Line Item	Tag	Value	Unit	Period
Net (loss) income, Alcoa Corporation	`NetIncomeLoss`	$-221.00M	USD	1 Quarter
Net (loss) income, Alcoa Corporation	`NetIncomeLoss`	$250.00M	USD	Annual
Net (loss) income, Alcoa Corporation	`NetIncomeLoss`	$-303.00M	USD	1 Quarter
Net (loss) income, Alcoa Corporation	`NetIncomeLoss`	$-402.00M	USD	1 Quarter
Net (loss) income, Alcoa Corporation	`NetIncomeLoss`	$-6.00M	USD	1 Quarter
Net (loss) income, Alcoa Corporation	`NetIncomeLoss`	$10.00M	USD	1 Quarter
Net (loss) income, Alcoa Corporation	`NetIncomeLoss`	$-199.00M	USD	1 Quarter
Net (loss) income, Alcoa Corporation	`NetIncomeLoss`	$279.00M	USD	Annual
Net (loss) income, Alcoa Corporation	`NetIncomeLoss`	$51.00M	USD	1 Quarter
Net (loss) income, Alcoa Corporation	`NetIncomeLoss`	$-1.12B	USD	Annual
Net (loss) income, Alcoa Corporation	`NetIncomeLoss`	$195.00M	USD	1 Quarter
Net (loss) income, Noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$643.00M	USD	Annual
Net (loss) income, Noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$329.00M	USD	Annual
Net (loss) income, Noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$272.00M	USD	Annual
Net (loss) income	`ProfitLoss`	$893.00M	USD	Annual
Net (loss) income	`ProfitLoss`	$340.00M	USD	1 Quarter
Net (loss) income	`ProfitLoss`	$-853.00M	USD	Annual
Net (loss) income	`ProfitLoss`	$-147.00M	USD	1 Quarter
Net (loss) income	`ProfitLoss`	$-293.00M	USD	1 Quarter
Net (loss) income	`ProfitLoss`	$608.00M	USD	Annual
Net (loss) income	`ProfitLoss`	$-355.00M	USD	1 Quarter
Net (loss) income	`ProfitLoss`	$195.00M	USD	1 Quarter
Net (loss) income	`ProfitLoss`	$131.00M	USD	1 Quarter
Net (loss) income	`ProfitLoss`	$227.00M	USD	1 Quarter
Net (loss) income	`ProfitLoss`	$-58.00M	USD	1 Quarter
Change in unrecognized net actuarial loss and prior service cost/benefit related to pension and other postretirement benefits, Alcoa Corporation	`OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent`	$503.00M	USD	Annual
Change in unrecognized net actuarial loss and prior service cost/benefit related to pension and other postretirement benefits, Alcoa Corporation	`OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent`	$1.00M	USD	Annual
Change in unrecognized net actuarial loss and prior service cost/benefit related to pension and other postretirement benefits, Alcoa Corporation	`OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent`	$-456.00M	USD	Annual
Change in unrecognized net actuarial loss and prior service cost/benefit related to pension and other postretirement benefits, Noncontrolling interest	`OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest`	$-10.00M	USD	Annual
Change in unrecognized net actuarial loss and prior service cost/benefit related to pension and other postretirement benefits, Noncontrolling interest	`OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest`	$9.00M	USD	Annual
Change in unrecognized net actuarial loss and prior service cost/benefit related to pension and other postretirement benefits, Noncontrolling interest	`OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest`	$1.00M	USD	Annual
Change in unrecognized net actuarial loss and prior service cost/benefit related to pension and other postretirement benefits	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$9.00M	USD	Annual
Change in unrecognized net actuarial loss and prior service cost/benefit related to pension and other postretirement benefits	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$447.00M	USD	Annual
Change in unrecognized net actuarial loss and prior service cost/benefit related to pension and other postretirement benefits	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-504.00M	USD	Annual
Foreign currency translation adjustments, Alcoa Corporation	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent`	$-89.00M	USD	Annual
Foreign currency translation adjustments, Alcoa Corporation	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent`	$188.00M	USD	Annual
Foreign currency translation adjustments, Alcoa Corporation	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent`	$-604.00M	USD	Annual
Foreign currency translation adjustments, Noncontrolling interest	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest`	$-229.00M	USD	Annual
Foreign currency translation adjustments, Noncontrolling interest	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest`	$96.00M	USD	Annual
Foreign currency translation adjustments, Noncontrolling interest	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest`	$-24.00M	USD	Annual
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$-833.00M	USD	Annual
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$-113.00M	USD	Annual
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$284.00M	USD	Annual
Net change in unrecognized gains/losses on cash flow hedges, Alcoa Corporation	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent`	$718.00M	USD	Annual
Net change in unrecognized gains/losses on cash flow hedges, Alcoa Corporation	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent`	$-321.00M	USD	Annual
Net change in unrecognized gains/losses on cash flow hedges, Alcoa Corporation	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent`	$-1.14B	USD	Annual
Net change in unrecognized gains/losses on cash flow hedges, Noncontrolling interest	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxNoncontrollingInterest`	$50.00M	USD	Annual
Net change in unrecognized gains/losses on cash flow hedges, Noncontrolling interest	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxNoncontrollingInterest`	$-11.00M	USD	Annual
Net change in unrecognized gains/losses on cash flow hedges, Noncontrolling interest	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxNoncontrollingInterest`	$-20.00M	USD	Annual
Net change in unrecognized gains/losses on cash flow hedges	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax`	$-1.09B	USD	Annual
Net change in unrecognized gains/losses on cash flow hedges	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax`	$-332.00M	USD	Annual
Net change in unrecognized gains/losses on cash flow hedges	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax`	$698.00M	USD	Annual
Total Other comprehensive income (loss), net of tax, Alcoa Corporation	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-1.41B	USD	Annual
Total Other comprehensive income (loss), net of tax, Alcoa Corporation	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-409.00M	USD	Annual
Total Other comprehensive income (loss), net of tax, Alcoa Corporation	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$617.00M	USD	Annual
Total Other comprehensive income (loss), net of tax, Noncontrolling interest	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest`	$-248.00M	USD	Annual
Total Other comprehensive income (loss), net of tax, Noncontrolling interest	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest`	$-45.00M	USD	Annual
Total Other comprehensive income (loss), net of tax, Noncontrolling interest	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest`	$155.00M	USD	Annual
Total Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$-454.00M	USD	Annual
Total Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$369.00M	USD	Annual
Total Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$-1.25B	USD	Annual
Comprehensive (loss) income, Alcoa Corporation	`ComprehensiveIncomeNetOfTax`	$-1.13B	USD	Annual
Comprehensive (loss) income, Alcoa Corporation	`ComprehensiveIncomeNetOfTax`	$-1.53B	USD	Annual
Comprehensive (loss) income, Alcoa Corporation	`ComprehensiveIncomeNetOfTax`	$867.00M	USD	Annual
Comprehensive (loss) income, Noncontrolling interest	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$227.00M	USD	Annual
Comprehensive (loss) income, Noncontrolling interest	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$395.00M	USD	Annual
Comprehensive (loss) income, Noncontrolling interest	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$484.00M	USD	Annual
Comprehensive (loss) income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$-644.00M	USD	Annual
Comprehensive (loss) income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$1.26B	USD	Annual
Comprehensive (loss) income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$-1.31B	USD	Annual

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