10-Q Filing

ALCOA CORP CIK: 1675149 Q1 2024

Filing Information

Form Type	10-Q
Accession Number	`0000950170-24-052174`
Period End Date	20240331
Filing Date	20240502
Fiscal Year	2024
Fiscal Period	Q1
XBRL Instance	aa-20240331_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 164 Income Statement 66 Cash Flow Statement 158 Stockholders Equity 52 Comprehensive Income 70

Balance Sheet 164 line items

Line Item	Tag	Value	Unit	Period
Cash and cash equivalents (M)	`CashAndCashEquivalentsAtCarryingValue`	$944.00M	USD	Point-in-time
Cash and cash equivalents (M)	`CashAndCashEquivalentsAtCarryingValue`	$944.00M	USD	Point-in-time
Cash and cash equivalents (M)	`CashAndCashEquivalentsAtCarryingValue`	$1.36B	USD	Point-in-time
Cash and cash equivalents (M)	`CashAndCashEquivalentsAtCarryingValue`	$1.36B	USD	Point-in-time
Receivables from customers (I)	`AccountsReceivableNetCurrent`	$656.00M	USD	Point-in-time
Receivables from customers (I)	`AccountsReceivableNetCurrent`	$656.00M	USD	Point-in-time
Receivables from customers (I)	`AccountsReceivableNetCurrent`	$869.00M	USD	Point-in-time
Receivables from customers (I)	`AccountsReceivableNetCurrent`	$869.00M	USD	Point-in-time
Other receivables	`OtherReceivablesNetCurrent`	$132.00M	USD	Point-in-time
Other receivables	`OtherReceivablesNetCurrent`	$132.00M	USD	Point-in-time
Other receivables	`OtherReceivablesNetCurrent`	$152.00M	USD	Point-in-time
Other receivables	`OtherReceivablesNetCurrent`	$152.00M	USD	Point-in-time
Inventories (J)	`InventoryNet`	$2.05B	USD	Point-in-time
Inventories (J)	`InventoryNet`	$2.05B	USD	Point-in-time
Inventories (J)	`InventoryNet`	$2.16B	USD	Point-in-time
Inventories (J)	`InventoryNet`	$2.16B	USD	Point-in-time
Fair value of derivative instruments (M)	`DerivativeAssetsCurrent`	$29.00M	USD	Point-in-time
Fair value of derivative instruments (M)	`DerivativeAssetsCurrent`	$29.00M	USD	Point-in-time
Fair value of derivative instruments (M)	`DerivativeAssetsCurrent`	$22.00M	USD	Point-in-time
Fair value of derivative instruments (M)	`DerivativeAssetsCurrent`	$22.00M	USD	Point-in-time
Prepaid expenses and other current assets	`PrepaidExpenseAndOtherAssetsCurrent`	$466.00M	USD	Point-in-time
Prepaid expenses and other current assets	`PrepaidExpenseAndOtherAssetsCurrent`	$466.00M	USD	Point-in-time
Prepaid expenses and other current assets	`PrepaidExpenseAndOtherAssetsCurrent`	$452.00M	USD	Point-in-time
Prepaid expenses and other current assets	`PrepaidExpenseAndOtherAssetsCurrent`	$452.00M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$4.88B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$4.88B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$4.41B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$4.41B	USD	Point-in-time
Properties, plants, and equipment	`PropertyPlantAndEquipmentGross`	$20.38B	USD	Point-in-time
Properties, plants, and equipment	`PropertyPlantAndEquipmentGross`	$20.38B	USD	Point-in-time
Properties, plants, and equipment	`PropertyPlantAndEquipmentGross`	$19.96B	USD	Point-in-time
Properties, plants, and equipment	`PropertyPlantAndEquipmentGross`	$19.96B	USD	Point-in-time
Less: accumulated depreciation, depletion, and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$13.60B	USD	Point-in-time
Less: accumulated depreciation, depletion, and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$13.60B	USD	Point-in-time
Less: accumulated depreciation, depletion, and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$13.38B	USD	Point-in-time
Less: accumulated depreciation, depletion, and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$13.38B	USD	Point-in-time
Properties, plants, and equipment, net	`PropertyPlantAndEquipmentNet`	$6.79B	USD	Point-in-time
Properties, plants, and equipment, net	`PropertyPlantAndEquipmentNet`	$6.79B	USD	Point-in-time
Properties, plants, and equipment, net	`PropertyPlantAndEquipmentNet`	$6.58B	USD	Point-in-time
Properties, plants, and equipment, net	`PropertyPlantAndEquipmentNet`	$6.58B	USD	Point-in-time
Investments (H)	`InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures`	$979.00M	USD	Point-in-time
Investments (H)	`InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures`	$979.00M	USD	Point-in-time
Investments (H)	`InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures`	$969.00M	USD	Point-in-time
Investments (H)	`InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures`	$969.00M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxAssetsNet`	$333.00M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxAssetsNet`	$333.00M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxAssetsNet`	$295.00M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxAssetsNet`	$295.00M	USD	Point-in-time
Fair value of derivative instruments (M)	`DerivativeAssetsNoncurrent`	$3.00M	USD	Point-in-time
Fair value of derivative instruments (M)	`DerivativeAssetsNoncurrent`	$3.00M	USD	Point-in-time
Fair value of derivative instruments (M)	`DerivativeAssetsNoncurrent`	$1.00M	USD	Point-in-time
Fair value of derivative instruments (M)	`DerivativeAssetsNoncurrent`	$1.00M	USD	Point-in-time
Other noncurrent assets	`OtherAssetsNoncurrent`	$1.65B	USD	Point-in-time
Other noncurrent assets	`OtherAssetsNoncurrent`	$1.65B	USD	Point-in-time
Other noncurrent assets	`OtherAssetsNoncurrent`	$1.60B	USD	Point-in-time
Other noncurrent assets	`OtherAssetsNoncurrent`	$1.60B	USD	Point-in-time
Total assets	`Assets`	$14.33B	USD	Point-in-time
Total assets	`Assets`	$14.33B	USD	Point-in-time
Total assets	`Assets`	$14.15B	USD	Point-in-time
Total assets	`Assets`	$14.15B	USD	Point-in-time
Accounts payable, trade	`AccountsPayableCurrent`	$1.71B	USD	Point-in-time
Accounts payable, trade	`AccountsPayableCurrent`	$1.71B	USD	Point-in-time
Accounts payable, trade	`AccountsPayableCurrent`	$1.59B	USD	Point-in-time
Accounts payable, trade	`AccountsPayableCurrent`	$1.59B	USD	Point-in-time
Accrued compensation and retirement costs	`EmployeeRelatedLiabilitiesCurrent`	$331.00M	USD	Point-in-time
Accrued compensation and retirement costs	`EmployeeRelatedLiabilitiesCurrent`	$331.00M	USD	Point-in-time
Accrued compensation and retirement costs	`EmployeeRelatedLiabilitiesCurrent`	$357.00M	USD	Point-in-time
Accrued compensation and retirement costs	`EmployeeRelatedLiabilitiesCurrent`	$357.00M	USD	Point-in-time
Taxes, including income taxes	`TaxesPayableCurrent`	$88.00M	USD	Point-in-time
Taxes, including income taxes	`TaxesPayableCurrent`	$88.00M	USD	Point-in-time
Taxes, including income taxes	`TaxesPayableCurrent`	$94.00M	USD	Point-in-time
Taxes, including income taxes	`TaxesPayableCurrent`	$94.00M	USD	Point-in-time
Fair value of derivative instruments (M)	`DerivativeLiabilitiesCurrent`	$205.00M	USD	Point-in-time
Fair value of derivative instruments (M)	`DerivativeLiabilitiesCurrent`	$205.00M	USD	Point-in-time
Fair value of derivative instruments (M)	`DerivativeLiabilitiesCurrent`	$214.00M	USD	Point-in-time
Fair value of derivative instruments (M)	`DerivativeLiabilitiesCurrent`	$214.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$578.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$578.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$746.00M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$746.00M	USD	Point-in-time
Long-term debt due within one year (K & M)	`LongTermDebtAndCapitalLeaseObligationsCurrent`	$79.00M	USD	Point-in-time
Long-term debt due within one year (K & M)	`LongTermDebtAndCapitalLeaseObligationsCurrent`	$79.00M	USD	Point-in-time
Long-term debt due within one year (K & M)	`LongTermDebtAndCapitalLeaseObligationsCurrent`	$79.00M	USD	Point-in-time
Long-term debt due within one year (K & M)	`LongTermDebtAndCapitalLeaseObligationsCurrent`	$79.00M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$3.03B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$3.03B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$3.04B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$3.04B	USD	Point-in-time
Long-term debt, less amount due within one year (K & M)	`LongTermDebtAndCapitalLeaseObligations`	$2.47B	USD	Point-in-time
Long-term debt, less amount due within one year (K & M)	`LongTermDebtAndCapitalLeaseObligations`	$2.47B	USD	Point-in-time
Long-term debt, less amount due within one year (K & M)	`LongTermDebtAndCapitalLeaseObligations`	$1.73B	USD	Point-in-time
Long-term debt, less amount due within one year (K & M)	`LongTermDebtAndCapitalLeaseObligations`	$1.73B	USD	Point-in-time
Accrued pension benefits (L)	`DefinedBenefitPensionPlanLiabilitiesNoncurrent`	$267.00M	USD	Point-in-time
Accrued pension benefits (L)	`DefinedBenefitPensionPlanLiabilitiesNoncurrent`	$267.00M	USD	Point-in-time
Accrued pension benefits (L)	`DefinedBenefitPensionPlanLiabilitiesNoncurrent`	$278.00M	USD	Point-in-time
Accrued pension benefits (L)	`DefinedBenefitPensionPlanLiabilitiesNoncurrent`	$278.00M	USD	Point-in-time
Accrued other postretirement benefits (L)	`OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent`	$437.00M	USD	Point-in-time
Accrued other postretirement benefits (L)	`OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent`	$437.00M	USD	Point-in-time
Accrued other postretirement benefits (L)	`OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent`	$443.00M	USD	Point-in-time
Accrued other postretirement benefits (L)	`OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent`	$443.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$772.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$772.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$718.00M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$718.00M	USD	Point-in-time
Environmental remediation (O)	`AccruedEnvironmentalLossContingenciesNoncurrent`	$202.00M	USD	Point-in-time
Environmental remediation (O)	`AccruedEnvironmentalLossContingenciesNoncurrent`	$202.00M	USD	Point-in-time
Environmental remediation (O)	`AccruedEnvironmentalLossContingenciesNoncurrent`	$197.00M	USD	Point-in-time
Environmental remediation (O)	`AccruedEnvironmentalLossContingenciesNoncurrent`	$197.00M	USD	Point-in-time
Fair value of derivative instruments (M)	`DerivativeLiabilitiesNoncurrent`	$1.09B	USD	Point-in-time
Fair value of derivative instruments (M)	`DerivativeLiabilitiesNoncurrent`	$1.09B	USD	Point-in-time
Fair value of derivative instruments (M)	`DerivativeLiabilitiesNoncurrent`	$925.00M	USD	Point-in-time
Fair value of derivative instruments (M)	`DerivativeLiabilitiesNoncurrent`	$925.00M	USD	Point-in-time
Noncurrent income taxes	`AccruedIncomeTaxesNoncurrent`	$193.00M	USD	Point-in-time
Noncurrent income taxes	`AccruedIncomeTaxesNoncurrent`	$193.00M	USD	Point-in-time
Noncurrent income taxes	`AccruedIncomeTaxesNoncurrent`	$134.00M	USD	Point-in-time
Noncurrent income taxes	`AccruedIncomeTaxesNoncurrent`	$134.00M	USD	Point-in-time
Other noncurrent liabilities and deferred credits	`DeferredCreditsAndOtherLiabilitiesNoncurrent`	$568.00M	USD	Point-in-time
Other noncurrent liabilities and deferred credits	`DeferredCreditsAndOtherLiabilitiesNoncurrent`	$568.00M	USD	Point-in-time
Other noncurrent liabilities and deferred credits	`DeferredCreditsAndOtherLiabilitiesNoncurrent`	$606.00M	USD	Point-in-time
Other noncurrent liabilities and deferred credits	`DeferredCreditsAndOtherLiabilitiesNoncurrent`	$606.00M	USD	Point-in-time
Total liabilities	`Liabilities`	$8.31B	USD	Point-in-time
Total liabilities	`Liabilities`	$8.31B	USD	Point-in-time
Total liabilities	`Liabilities`	$8.79B	USD	Point-in-time
Total liabilities	`Liabilities`	$8.79B	USD	Point-in-time
CONTINGENCIES AND COMMITMENTS (Q)	`CommitmentsAndContingencies`	-	USD	Point-in-time
CONTINGENCIES AND COMMITMENTS (Q)	`CommitmentsAndContingencies`	-	USD	Point-in-time
CONTINGENCIES AND COMMITMENTS (Q)	`CommitmentsAndContingencies`	-	USD	Point-in-time
CONTINGENCIES AND COMMITMENTS (Q)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Common stock	`CommonStockValue`	$2.00M	USD	Point-in-time
Common stock	`CommonStockValue`	$2.00M	USD	Point-in-time
Common stock	`CommonStockValue`	$2.00M	USD	Point-in-time
Common stock	`CommonStockValue`	$2.00M	USD	Point-in-time
Additional capital	`AdditionalPaidInCapitalCommonStock`	$9.19B	USD	Point-in-time
Additional capital	`AdditionalPaidInCapitalCommonStock`	$9.19B	USD	Point-in-time
Additional capital	`AdditionalPaidInCapitalCommonStock`	$9.18B	USD	Point-in-time
Additional capital	`AdditionalPaidInCapitalCommonStock`	$9.18B	USD	Point-in-time
Accumulated deficit	`RetainedEarningsAccumulatedDeficit`	$-1.56B	USD	Point-in-time
Accumulated deficit	`RetainedEarningsAccumulatedDeficit`	$-1.56B	USD	Point-in-time
Accumulated deficit	`RetainedEarningsAccumulatedDeficit`	$-1.29B	USD	Point-in-time
Accumulated deficit	`RetainedEarningsAccumulatedDeficit`	$-1.29B	USD	Point-in-time
Accumulated other comprehensive loss (G)	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-3.65B	USD	Point-in-time
Accumulated other comprehensive loss (G)	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-3.65B	USD	Point-in-time
Accumulated other comprehensive loss (G)	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-3.63B	USD	Point-in-time
Accumulated other comprehensive loss (G)	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-3.63B	USD	Point-in-time
Total Alcoa Corporation shareholders equity	`StockholdersEquity`	$4.25B	USD	Point-in-time
Total Alcoa Corporation shareholders equity	`StockholdersEquity`	$4.25B	USD	Point-in-time
Total Alcoa Corporation shareholders equity	`StockholdersEquity`	$3.99B	USD	Point-in-time
Total Alcoa Corporation shareholders equity	`StockholdersEquity`	$3.99B	USD	Point-in-time
Noncontrolling interest	`MinorityInterest`	$1.54B	USD	Point-in-time
Noncontrolling interest	`MinorityInterest`	$1.54B	USD	Point-in-time
Noncontrolling interest	`MinorityInterest`	$1.59B	USD	Point-in-time
Noncontrolling interest	`MinorityInterest`	$1.59B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.53B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.53B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.84B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.84B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.30B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.30B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.59B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.59B	USD	Point-in-time
Total liabilities and equity	`LiabilitiesAndStockholdersEquity`	$14.33B	USD	Point-in-time
Total liabilities and equity	`LiabilitiesAndStockholdersEquity`	$14.33B	USD	Point-in-time
Total liabilities and equity	`LiabilitiesAndStockholdersEquity`	$14.15B	USD	Point-in-time
Total liabilities and equity	`LiabilitiesAndStockholdersEquity`	$14.15B	USD	Point-in-time

Income Statement 66 line items

Line Item	Tag	Value	Unit	Period
Sales (E)	`RevenueFromContractWithCustomerExcludingAssessedTax`	$2.60B	USD	1 Quarter
Sales (E)	`RevenueFromContractWithCustomerExcludingAssessedTax`	$2.60B	USD	1 Quarter
Sales (E)	`RevenueFromContractWithCustomerExcludingAssessedTax`	$2.67B	USD	1 Quarter
Sales (E)	`RevenueFromContractWithCustomerExcludingAssessedTax`	$2.67B	USD	1 Quarter
Cost of goods sold (exclusive of expenses below)	`CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization`	$2.40B	USD	1 Quarter
Cost of goods sold (exclusive of expenses below)	`CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization`	$2.40B	USD	1 Quarter
Cost of goods sold (exclusive of expenses below)	`CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization`	$2.40B	USD	1 Quarter
Cost of goods sold (exclusive of expenses below)	`CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization`	$2.40B	USD	1 Quarter
Selling, general administrative, and other expenses	`SellingGeneralAndAdministrativeExpense`	$54.00M	USD	1 Quarter
Selling, general administrative, and other expenses	`SellingGeneralAndAdministrativeExpense`	$54.00M	USD	1 Quarter
Selling, general administrative, and other expenses	`SellingGeneralAndAdministrativeExpense`	$60.00M	USD	1 Quarter
Selling, general administrative, and other expenses	`SellingGeneralAndAdministrativeExpense`	$60.00M	USD	1 Quarter
Research and development expenses	`ResearchAndDevelopmentExpense`	$11.00M	USD	1 Quarter
Research and development expenses	`ResearchAndDevelopmentExpense`	$11.00M	USD	1 Quarter
Research and development expenses	`ResearchAndDevelopmentExpense`	$10.00M	USD	1 Quarter
Research and development expenses	`ResearchAndDevelopmentExpense`	$10.00M	USD	1 Quarter
Provision for depreciation, depletion, and amortization	`DepreciationDepletionAndAmortization`	$153.00M	USD	1 Quarter
Provision for depreciation, depletion, and amortization	`DepreciationDepletionAndAmortization`	$153.00M	USD	1 Quarter
Provision for depreciation, depletion, and amortization	`DepreciationDepletionAndAmortization`	$161.00M	USD	1 Quarter
Provision for depreciation, depletion, and amortization	`DepreciationDepletionAndAmortization`	$161.00M	USD	1 Quarter
Restructuring and other charges, net (D)	`RestructuringAndOtherChargesBenefitNet`	$149.00M	USD	1 Quarter
Restructuring and other charges, net (D)	`RestructuringAndOtherChargesBenefitNet`	$149.00M	USD	1 Quarter
Restructuring and other charges, net (D)	`RestructuringAndOtherChargesBenefitNet`	$202.00M	USD	1 Quarter
Restructuring and other charges, net (D)	`RestructuringAndOtherChargesBenefitNet`	$202.00M	USD	1 Quarter
Interest expense	`InterestExpense`	$27.00M	USD	1 Quarter
Interest expense	`InterestExpense`	$27.00M	USD	1 Quarter
Interest expense	`InterestExpense`	$26.00M	USD	1 Quarter
Interest expense	`InterestExpense`	$26.00M	USD	1 Quarter
Other expenses, net (P)	`NonoperatingIncomeExpense`	$-59.00M	USD	1 Quarter
Other expenses, net (P)	`NonoperatingIncomeExpense`	$-59.00M	USD	1 Quarter
Other expenses, net (P)	`NonoperatingIncomeExpense`	$-54.00M	USD	1 Quarter
Other expenses, net (P)	`NonoperatingIncomeExpense`	$-54.00M	USD	1 Quarter
Total costs and expenses	`CostsAndOperatingExpensesAndNonoperatingIncomeExpenses`	$2.85B	USD	1 Quarter
Total costs and expenses	`CostsAndOperatingExpensesAndNonoperatingIncomeExpenses`	$2.85B	USD	1 Quarter
Total costs and expenses	`CostsAndOperatingExpensesAndNonoperatingIncomeExpenses`	$2.92B	USD	1 Quarter
Total costs and expenses	`CostsAndOperatingExpensesAndNonoperatingIncomeExpenses`	$2.92B	USD	1 Quarter
Consolidated loss before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$-325.00M	USD	1 Quarter
Consolidated loss before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$-325.00M	USD	1 Quarter
Consolidated loss before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$-180.00M	USD	1 Quarter
Consolidated loss before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$-180.00M	USD	1 Quarter
(Benefit from) provision for income taxes	`IncomeTaxExpenseBenefit`	$-18.00M	USD	1 Quarter
(Benefit from) provision for income taxes	`IncomeTaxExpenseBenefit`	$-18.00M	USD	1 Quarter
(Benefit from) provision for income taxes	`IncomeTaxExpenseBenefit`	$52.00M	USD	1 Quarter
(Benefit from) provision for income taxes	`IncomeTaxExpenseBenefit`	$52.00M	USD	1 Quarter
Net loss	`ProfitLoss`	$-232.00M	USD	1 Quarter
Net loss	`ProfitLoss`	$-232.00M	USD	1 Quarter
Net loss	`ProfitLoss`	$-307.00M	USD	1 Quarter
Net loss	`ProfitLoss`	$-307.00M	USD	1 Quarter
Less: Net loss attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$-55.00M	USD	1 Quarter
Less: Net loss attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$-55.00M	USD	1 Quarter
Less: Net loss attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$-1.00M	USD	1 Quarter
Less: Net loss attributable to noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$-1.00M	USD	1 Quarter
NET LOSS ATTRIBUTABLE TO ALCOA CORPORATION	`NetIncomeLoss`	$-231.00M	USD	1 Quarter
NET LOSS ATTRIBUTABLE TO ALCOA CORPORATION	`NetIncomeLoss`	$-231.00M	USD	1 Quarter
NET LOSS ATTRIBUTABLE TO ALCOA CORPORATION	`NetIncomeLoss`	$-252.00M	USD	1 Quarter
NET LOSS ATTRIBUTABLE TO ALCOA CORPORATION	`NetIncomeLoss`	$-252.00M	USD	1 Quarter
NET LOSS ATTRIBUTABLE TO ALCOA CORPORATION	`NetIncomeLoss`	$-231.00M	USD	Annual
NET LOSS ATTRIBUTABLE TO ALCOA CORPORATION	`NetIncomeLoss`	$-231.00M	USD	Annual
Basic	`EarningsPerShareBasic`	$-1.41	USD	1 Quarter
Basic	`EarningsPerShareBasic`	$-1.41	USD	1 Quarter
Basic	`EarningsPerShareBasic`	$-1.30	USD	1 Quarter
Basic	`EarningsPerShareBasic`	$-1.30	USD	1 Quarter
Diluted	`EarningsPerShareDiluted`	$-1.41	USD	1 Quarter
Diluted	`EarningsPerShareDiluted`	$-1.41	USD	1 Quarter
Diluted	`EarningsPerShareDiluted`	$-1.30	USD	1 Quarter
Diluted	`EarningsPerShareDiluted`	$-1.30	USD	1 Quarter

Cash Flow Statement 158 line items

Line Item	Tag	Value	Unit	Period
Net loss	`ProfitLoss`	$-232.00M	USD	1 Quarter
Net loss	`ProfitLoss`	$-232.00M	USD	1 Quarter
Net loss	`ProfitLoss`	$-307.00M	USD	1 Quarter
Net loss	`ProfitLoss`	$-307.00M	USD	1 Quarter
Depreciation, depletion, and amortization	`DepreciationDepletionAndAmortization`	$153.00M	USD	1 Quarter
Depreciation, depletion, and amortization	`DepreciationDepletionAndAmortization`	$153.00M	USD	1 Quarter
Depreciation, depletion, and amortization	`DepreciationDepletionAndAmortization`	$161.00M	USD	1 Quarter
Depreciation, depletion, and amortization	`DepreciationDepletionAndAmortization`	$161.00M	USD	1 Quarter
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$-24.00M	USD	1 Quarter
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$-24.00M	USD	1 Quarter
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$-63.00M	USD	1 Quarter
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$-63.00M	USD	1 Quarter
Equity loss, net of dividends	`IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions`	$-23.00M	USD	1 Quarter
Equity loss, net of dividends	`IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions`	$-23.00M	USD	1 Quarter
Equity loss, net of dividends	`IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions`	$-93.00M	USD	1 Quarter
Equity loss, net of dividends	`IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions`	$-93.00M	USD	1 Quarter
Restructuring and other charges, net (D)	`RestructuringAndOtherChargesBenefitNet`	$149.00M	USD	1 Quarter
Restructuring and other charges, net (D)	`RestructuringAndOtherChargesBenefitNet`	$149.00M	USD	1 Quarter
Restructuring and other charges, net (D)	`RestructuringAndOtherChargesBenefitNet`	$202.00M	USD	1 Quarter
Restructuring and other charges, net (D)	`RestructuringAndOtherChargesBenefitNet`	$202.00M	USD	1 Quarter
Net loss from investing activities - asset sales (P)	`GainLossOnDispositionOfAssets1`	$-18.00M	USD	1 Quarter
Net loss from investing activities - asset sales (P)	`GainLossOnDispositionOfAssets1`	$-18.00M	USD	1 Quarter
Net loss from investing activities - asset sales (P)	`GainLossOnDispositionOfAssets1`	$-11.00M	USD	1 Quarter
Net loss from investing activities - asset sales (P)	`GainLossOnDispositionOfAssets1`	$-11.00M	USD	1 Quarter
Net periodic pension benefit cost (L)	`DefinedBenefitPensionPlansNetPeriodicBenefitCost`	$3.00M	USD	1 Quarter
Net periodic pension benefit cost (L)	`DefinedBenefitPensionPlansNetPeriodicBenefitCost`	$3.00M	USD	1 Quarter
Net periodic pension benefit cost (L)	`DefinedBenefitPensionPlansNetPeriodicBenefitCost`	$1.00M	USD	1 Quarter
Net periodic pension benefit cost (L)	`DefinedBenefitPensionPlansNetPeriodicBenefitCost`	$1.00M	USD	1 Quarter
Stock-based compensation	`ShareBasedCompensation`	$10.00M	USD	1 Quarter
Stock-based compensation	`ShareBasedCompensation`	$10.00M	USD	1 Quarter
Stock-based compensation	`ShareBasedCompensation`	$10.00M	USD	1 Quarter
Stock-based compensation	`ShareBasedCompensation`	$10.00M	USD	1 Quarter
Loss (gain) on mark-to-market derivative financial contracts	`GainOnMarkToMarketDerivativeFinancialContracts`	$18.00M	USD	1 Quarter
Loss (gain) on mark-to-market derivative financial contracts	`GainOnMarkToMarketDerivativeFinancialContracts`	$18.00M	USD	1 Quarter
Loss (gain) on mark-to-market derivative financial contracts	`GainOnMarkToMarketDerivativeFinancialContracts`	$-2.00M	USD	1 Quarter
Loss (gain) on mark-to-market derivative financial contracts	`GainOnMarkToMarketDerivativeFinancialContracts`	$-2.00M	USD	1 Quarter
Other	`OtherNoncashIncomeExpense`	$-20.00M	USD	1 Quarter
Other	`OtherNoncashIncomeExpense`	$-20.00M	USD	1 Quarter
Other	`OtherNoncashIncomeExpense`	$-48.00M	USD	1 Quarter
Other	`OtherNoncashIncomeExpense`	$-48.00M	USD	1 Quarter
(Increase) decrease in receivables	`IncreaseDecreaseInReceivables`	$-40.00M	USD	1 Quarter
(Increase) decrease in receivables	`IncreaseDecreaseInReceivables`	$-40.00M	USD	1 Quarter
(Increase) decrease in receivables	`IncreaseDecreaseInReceivables`	$212.00M	USD	1 Quarter
(Increase) decrease in receivables	`IncreaseDecreaseInReceivables`	$212.00M	USD	1 Quarter
Decrease in inventories	`IncreaseDecreaseInInventories`	$-17.00M	USD	1 Quarter
Decrease in inventories	`IncreaseDecreaseInInventories`	$-17.00M	USD	1 Quarter
Decrease in inventories	`IncreaseDecreaseInInventories`	$-71.00M	USD	1 Quarter
Decrease in inventories	`IncreaseDecreaseInInventories`	$-71.00M	USD	1 Quarter
(Increase) decrease in prepaid expenses and other current assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$-4.00M	USD	1 Quarter
(Increase) decrease in prepaid expenses and other current assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$-4.00M	USD	1 Quarter
(Increase) decrease in prepaid expenses and other current assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$6.00M	USD	1 Quarter
(Increase) decrease in prepaid expenses and other current assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$6.00M	USD	1 Quarter
Decrease in accounts payable, trade	`IncreaseDecreaseInAccountsPayableTrade`	$-273.00M	USD	1 Quarter
Decrease in accounts payable, trade	`IncreaseDecreaseInAccountsPayableTrade`	$-273.00M	USD	1 Quarter
Decrease in accounts payable, trade	`IncreaseDecreaseInAccountsPayableTrade`	$-98.00M	USD	1 Quarter
Decrease in accounts payable, trade	`IncreaseDecreaseInAccountsPayableTrade`	$-98.00M	USD	1 Quarter
Decrease in accrued expenses	`IncreaseDecreaseInAccruedLiabilities`	$-22.00M	USD	1 Quarter
Decrease in accrued expenses	`IncreaseDecreaseInAccruedLiabilities`	$-22.00M	USD	1 Quarter
Decrease in accrued expenses	`IncreaseDecreaseInAccruedLiabilities`	$-45.00M	USD	1 Quarter
Decrease in accrued expenses	`IncreaseDecreaseInAccruedLiabilities`	$-45.00M	USD	1 Quarter
Increase (decrease) in taxes, including income taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$-13.00M	USD	1 Quarter
Increase (decrease) in taxes, including income taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$-13.00M	USD	1 Quarter
Increase (decrease) in taxes, including income taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$18.00M	USD	1 Quarter
Increase (decrease) in taxes, including income taxes	`IncreaseDecreaseInAccruedTaxesPayable`	$18.00M	USD	1 Quarter
Pension contributions (L)	`PensionContributions`	$4.00M	USD	1 Quarter
Pension contributions (L)	`PensionContributions`	$4.00M	USD	1 Quarter
Pension contributions (L)	`PensionContributions`	$6.00M	USD	1 Quarter
Pension contributions (L)	`PensionContributions`	$6.00M	USD	1 Quarter
Decrease (increase) in noncurrent assets	`IncreaseDecreaseInOtherNoncurrentAssets`	$29.00M	USD	1 Quarter
Decrease (increase) in noncurrent assets	`IncreaseDecreaseInOtherNoncurrentAssets`	$29.00M	USD	1 Quarter
Decrease (increase) in noncurrent assets	`IncreaseDecreaseInOtherNoncurrentAssets`	$-9.00M	USD	1 Quarter
Decrease (increase) in noncurrent assets	`IncreaseDecreaseInOtherNoncurrentAssets`	$-9.00M	USD	1 Quarter
Decrease in noncurrent liabilities	`IncreaseDecreaseInOtherNoncurrentLiabilities`	$-39.00M	USD	1 Quarter
Decrease in noncurrent liabilities	`IncreaseDecreaseInOtherNoncurrentLiabilities`	$-39.00M	USD	1 Quarter
Decrease in noncurrent liabilities	`IncreaseDecreaseInOtherNoncurrentLiabilities`	$-58.00M	USD	1 Quarter
Decrease in noncurrent liabilities	`IncreaseDecreaseInOtherNoncurrentLiabilities`	$-58.00M	USD	1 Quarter
CASH USED FOR OPERATIONS	`NetCashProvidedByUsedInOperatingActivities`	$-223.00M	USD	1 Quarter
CASH USED FOR OPERATIONS	`NetCashProvidedByUsedInOperatingActivities`	$-223.00M	USD	1 Quarter
CASH USED FOR OPERATIONS	`NetCashProvidedByUsedInOperatingActivities`	$-163.00M	USD	1 Quarter
CASH USED FOR OPERATIONS	`NetCashProvidedByUsedInOperatingActivities`	$-163.00M	USD	1 Quarter
Additions to debt	`AdditionsToLongTermDebtIssuedLessIssuanceDiscount`	$25.00M	USD	1 Quarter
Additions to debt	`AdditionsToLongTermDebtIssuedLessIssuanceDiscount`	$25.00M	USD	1 Quarter
Additions to debt	`AdditionsToLongTermDebtIssuedLessIssuanceDiscount`	$965.00M	USD	1 Quarter
Additions to debt	`AdditionsToLongTermDebtIssuedLessIssuanceDiscount`	$965.00M	USD	1 Quarter
Payments on debt	`RepaymentsOfLongTermDebt`	$1.00M	USD	1 Quarter
Payments on debt	`RepaymentsOfLongTermDebt`	$1.00M	USD	1 Quarter
Payments on debt	`RepaymentsOfLongTermDebt`	$221.00M	USD	1 Quarter
Payments on debt	`RepaymentsOfLongTermDebt`	$221.00M	USD	1 Quarter
Proceeds from the exercise of employee stock options	`ProceedsFromStockOptionsExercised`	$1.00M	USD	1 Quarter
Proceeds from the exercise of employee stock options	`ProceedsFromStockOptionsExercised`	$1.00M	USD	1 Quarter
Dividends paid on Alcoa common stock	`PaymentsOfDividendsCommonStock`	$19.00M	USD	1 Quarter
Dividends paid on Alcoa common stock	`PaymentsOfDividendsCommonStock`	$19.00M	USD	1 Quarter
Dividends paid on Alcoa common stock	`PaymentsOfDividendsCommonStock`	$18.00M	USD	1 Quarter
Dividends paid on Alcoa common stock	`PaymentsOfDividendsCommonStock`	$18.00M	USD	1 Quarter
Payments related to tax withholding on stock-based compensation awards	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$34.00M	USD	1 Quarter
Payments related to tax withholding on stock-based compensation awards	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$34.00M	USD	1 Quarter
Payments related to tax withholding on stock-based compensation awards	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$15.00M	USD	1 Quarter
Payments related to tax withholding on stock-based compensation awards	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$15.00M	USD	1 Quarter
Financial contributions for the divestiture of businesses (C)	`PaymentsForFinancialContributionsForTheDivestitureOfBusinesses`	$7.00M	USD	1 Quarter
Financial contributions for the divestiture of businesses (C)	`PaymentsForFinancialContributionsForTheDivestitureOfBusinesses`	$7.00M	USD	1 Quarter
Financial contributions for the divestiture of businesses (C)	`PaymentsForFinancialContributionsForTheDivestitureOfBusinesses`	$14.00M	USD	1 Quarter
Financial contributions for the divestiture of businesses (C)	`PaymentsForFinancialContributionsForTheDivestitureOfBusinesses`	$14.00M	USD	1 Quarter
Contributions from noncontrolling interest	`ProceedsFromMinorityShareholders`	$86.00M	USD	1 Quarter
Contributions from noncontrolling interest	`ProceedsFromMinorityShareholders`	$86.00M	USD	1 Quarter
Contributions from noncontrolling interest	`ProceedsFromMinorityShareholders`	$61.00M	USD	1 Quarter
Contributions from noncontrolling interest	`ProceedsFromMinorityShareholders`	$61.00M	USD	1 Quarter
Distributions to noncontrolling interest	`PaymentsOfDividendsMinorityInterest`	$6.00M	USD	1 Quarter
Distributions to noncontrolling interest	`PaymentsOfDividendsMinorityInterest`	$6.00M	USD	1 Quarter
Distributions to noncontrolling interest	`PaymentsOfDividendsMinorityInterest`	$6.00M	USD	1 Quarter
Distributions to noncontrolling interest	`PaymentsOfDividendsMinorityInterest`	$6.00M	USD	1 Quarter
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$1.00M	USD	1 Quarter
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$1.00M	USD	1 Quarter
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-4.00M	USD	1 Quarter
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-4.00M	USD	1 Quarter
CASH PROVIDED FROM FINANCING ACTIVITIES	`NetCashProvidedByUsedInFinancingActivities`	$754.00M	USD	1 Quarter
CASH PROVIDED FROM FINANCING ACTIVITIES	`NetCashProvidedByUsedInFinancingActivities`	$754.00M	USD	1 Quarter
CASH PROVIDED FROM FINANCING ACTIVITIES	`NetCashProvidedByUsedInFinancingActivities`	$40.00M	USD	1 Quarter
CASH PROVIDED FROM FINANCING ACTIVITIES	`NetCashProvidedByUsedInFinancingActivities`	$40.00M	USD	1 Quarter
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$83.00M	USD	1 Quarter
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$83.00M	USD	1 Quarter
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$101.00M	USD	1 Quarter
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$101.00M	USD	1 Quarter
Proceeds from the sale of assets	`ProceedsFromSaleOfPropertyPlantAndEquipment`	$1.00M	USD	1 Quarter
Proceeds from the sale of assets	`ProceedsFromSaleOfPropertyPlantAndEquipment`	$1.00M	USD	1 Quarter
Proceeds from the sale of assets	`ProceedsFromSaleOfPropertyPlantAndEquipment`	$1.00M	USD	1 Quarter
Proceeds from the sale of assets	`ProceedsFromSaleOfPropertyPlantAndEquipment`	$1.00M	USD	1 Quarter
Additions to investments	`PaymentsToAcquireInvestments`	$17.00M	USD	1 Quarter
Additions to investments	`PaymentsToAcquireInvestments`	$17.00M	USD	1 Quarter
Additions to investments	`PaymentsToAcquireInvestments`	$20.00M	USD	1 Quarter
Additions to investments	`PaymentsToAcquireInvestments`	$20.00M	USD	1 Quarter
CASH USED FOR INVESTING ACTIVITIES	`NetCashProvidedByUsedInInvestingActivities`	$-102.00M	USD	1 Quarter
CASH USED FOR INVESTING ACTIVITIES	`NetCashProvidedByUsedInInvestingActivities`	$-102.00M	USD	1 Quarter
CASH USED FOR INVESTING ACTIVITIES	`NetCashProvidedByUsedInInvestingActivities`	$-117.00M	USD	1 Quarter
CASH USED FOR INVESTING ACTIVITIES	`NetCashProvidedByUsedInInvestingActivities`	$-117.00M	USD	1 Quarter
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS AND RESTRICTED CASH	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$-6.00M	USD	1 Quarter
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS AND RESTRICTED CASH	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$-6.00M	USD	1 Quarter
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS AND RESTRICTED CASH	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$2.00M	USD	1 Quarter
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS AND RESTRICTED CASH	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$2.00M	USD	1 Quarter
Net change in cash and cash equivalents and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$-223.00M	USD	1 Quarter
Net change in cash and cash equivalents and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$-223.00M	USD	1 Quarter
Net change in cash and cash equivalents and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$408.00M	USD	1 Quarter
Net change in cash and cash equivalents and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$408.00M	USD	1 Quarter
Cash and cash equivalents and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$1.47B	USD	Point-in-time
Cash and cash equivalents and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$1.47B	USD	Point-in-time
Cash and cash equivalents and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$1.05B	USD	Point-in-time
Cash and cash equivalents and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$1.05B	USD	Point-in-time
Cash and cash equivalents and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$1.46B	USD	Point-in-time
Cash and cash equivalents and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$1.46B	USD	Point-in-time
Cash and cash equivalents and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$1.25B	USD	Point-in-time
Cash and cash equivalents and restricted cash at beginning of year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$1.25B	USD	Point-in-time
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$1.47B	USD	Point-in-time
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$1.47B	USD	Point-in-time
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$1.05B	USD	Point-in-time
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$1.05B	USD	Point-in-time
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$1.46B	USD	Point-in-time
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$1.46B	USD	Point-in-time
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$1.25B	USD	Point-in-time
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$1.25B	USD	Point-in-time

Stockholders Equity 52 line items

Line Item	Tag	Value	Unit	Period
Common stock dividends per share	`CommonStockDividendsPerShareCashPaid`	$0.10	USD	1 Quarter
Common stock dividends per share	`CommonStockDividendsPerShareCashPaid`	$0.10	USD	1 Quarter
Common stock dividends per share	`CommonStockDividendsPerShareCashPaid`	$0.10	USD	1 Quarter
Common stock dividends per share	`CommonStockDividendsPerShareCashPaid`	$0.10	USD	1 Quarter
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.53B	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.53B	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.84B	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.84B	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.30B	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.30B	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.59B	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.59B	USD	Point-in-time
Net (loss) income	`ProfitLoss`	$-232.00M	USD	1 Quarter
Net (loss) income	`ProfitLoss`	$-232.00M	USD	1 Quarter
Net (loss) income	`ProfitLoss`	$-307.00M	USD	1 Quarter
Net (loss) income	`ProfitLoss`	$-307.00M	USD	1 Quarter
Other comprehensive (loss) income (G)	`OtherComprehensiveIncomeLossNetOfTax`	$-36.00M	USD	1 Quarter
Other comprehensive (loss) income (G)	`OtherComprehensiveIncomeLossNetOfTax`	$-36.00M	USD	1 Quarter
Other comprehensive (loss) income (G)	`OtherComprehensiveIncomeLossNetOfTax`	$-101.00M	USD	1 Quarter
Other comprehensive (loss) income (G)	`OtherComprehensiveIncomeLossNetOfTax`	$-101.00M	USD	1 Quarter
Stock-based compensation	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$10.00M	USD	1 Quarter
Stock-based compensation	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$10.00M	USD	1 Quarter
Stock-based compensation	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$10.00M	USD	1 Quarter
Stock-based compensation	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$10.00M	USD	1 Quarter
Net effect of tax withholding for compensation plans and exercise of stock options	`NetEffectOfTaxWithholdingShareBasedCompensationArrangementAndStockOptionsExercised`	$-15.00M	USD	1 Quarter
Net effect of tax withholding for compensation plans and exercise of stock options	`NetEffectOfTaxWithholdingShareBasedCompensationArrangementAndStockOptionsExercised`	$-15.00M	USD	1 Quarter
Net effect of tax withholding for compensation plans and exercise of stock options	`NetEffectOfTaxWithholdingShareBasedCompensationArrangementAndStockOptionsExercised`	$-33.00M	USD	1 Quarter
Net effect of tax withholding for compensation plans and exercise of stock options	`NetEffectOfTaxWithholdingShareBasedCompensationArrangementAndStockOptionsExercised`	$-33.00M	USD	1 Quarter
Dividends paid on Alcoa common stock ($0.10 per share)	`DividendsCommonStock`	$18.00M	USD	1 Quarter
Dividends paid on Alcoa common stock ($0.10 per share)	`DividendsCommonStock`	$18.00M	USD	1 Quarter
Dividends paid on Alcoa common stock ($0.10 per share)	`DividendsCommonStock`	$19.00M	USD	1 Quarter
Dividends paid on Alcoa common stock ($0.10 per share)	`DividendsCommonStock`	$19.00M	USD	1 Quarter
Contributions	`MinorityInterestIncreaseDecreaseFromCapitalContributionFromNoncontrollingInterestHolders`	$86.00M	USD	1 Quarter
Contributions	`MinorityInterestIncreaseDecreaseFromCapitalContributionFromNoncontrollingInterestHolders`	$86.00M	USD	1 Quarter
Contributions	`MinorityInterestIncreaseDecreaseFromCapitalContributionFromNoncontrollingInterestHolders`	$61.00M	USD	1 Quarter
Contributions	`MinorityInterestIncreaseDecreaseFromCapitalContributionFromNoncontrollingInterestHolders`	$61.00M	USD	1 Quarter
Distributions	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$6.00M	USD	1 Quarter
Distributions	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$6.00M	USD	1 Quarter
Distributions	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$6.00M	USD	1 Quarter
Distributions	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$6.00M	USD	1 Quarter
Other	`StockholdersEquityOther`	$1.00M	USD	1 Quarter
Other	`StockholdersEquityOther`	$1.00M	USD	1 Quarter
Other	`StockholdersEquityOther`	$1.00M	USD	1 Quarter
Other	`StockholdersEquityOther`	$1.00M	USD	1 Quarter
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.53B	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.53B	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.84B	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$5.84B	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.30B	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.30B	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.59B	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.59B	USD	Point-in-time

Comprehensive Income 70 line items

Line Item	Tag	Value	Unit	Period
NET LOSS ATTRIBUTABLE TO ALCOA CORPORATION	`NetIncomeLoss`	$-231.00M	USD	1 Quarter
NET LOSS ATTRIBUTABLE TO ALCOA CORPORATION	`NetIncomeLoss`	$-231.00M	USD	1 Quarter
NET LOSS ATTRIBUTABLE TO ALCOA CORPORATION	`NetIncomeLoss`	$-252.00M	USD	1 Quarter
NET LOSS ATTRIBUTABLE TO ALCOA CORPORATION	`NetIncomeLoss`	$-252.00M	USD	1 Quarter
NET LOSS ATTRIBUTABLE TO ALCOA CORPORATION	`NetIncomeLoss`	$-231.00M	USD	Annual
NET LOSS ATTRIBUTABLE TO ALCOA CORPORATION	`NetIncomeLoss`	$-231.00M	USD	Annual
Net income, Noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$-55.00M	USD	1 Quarter
Net income, Noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$-55.00M	USD	1 Quarter
Net income, Noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$-1.00M	USD	1 Quarter
Net income, Noncontrolling interest	`NetIncomeLossAttributableToNoncontrollingInterest`	$-1.00M	USD	1 Quarter
Net (loss) income	`ProfitLoss`	$-232.00M	USD	1 Quarter
Net (loss) income	`ProfitLoss`	$-232.00M	USD	1 Quarter
Net (loss) income	`ProfitLoss`	$-307.00M	USD	1 Quarter
Net (loss) income	`ProfitLoss`	$-307.00M	USD	1 Quarter
Change in unrecognized net actuarial gain/loss and prior service cost/benefit related to pension and other postretirement benefits, Alcoa Corporation	`OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent`	$4.00M	USD	1 Quarter
Change in unrecognized net actuarial gain/loss and prior service cost/benefit related to pension and other postretirement benefits, Alcoa Corporation	`OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent`	$4.00M	USD	1 Quarter
Change in unrecognized net actuarial gain/loss and prior service cost/benefit related to pension and other postretirement benefits, Alcoa Corporation	`OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent`	$9.00M	USD	1 Quarter
Change in unrecognized net actuarial gain/loss and prior service cost/benefit related to pension and other postretirement benefits, Alcoa Corporation	`OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent`	$9.00M	USD	1 Quarter
Change in unrecognized net actuarial gain/loss and prior service cost/benefit related to pension and other postretirement benefits, Noncontrolling interest	`OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest`	-	USD	1 Quarter
Change in unrecognized net actuarial gain/loss and prior service cost/benefit related to pension and other postretirement benefits, Noncontrolling interest	`OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest`	-	USD	1 Quarter
Change in unrecognized net actuarial gain/loss and prior service cost/benefit related to pension and other postretirement benefits, Noncontrolling interest	`OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Change in unrecognized net actuarial gain/loss and prior service cost/benefit related to pension and other postretirement benefits, Noncontrolling interest	`OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest`	$1.00M	USD	1 Quarter
Change in unrecognized net actuarial gain/loss and prior service cost/benefit related to pension and other postretirement benefits	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$10.00M	USD	1 Quarter
Change in unrecognized net actuarial gain/loss and prior service cost/benefit related to pension and other postretirement benefits	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$10.00M	USD	1 Quarter
Change in unrecognized net actuarial gain/loss and prior service cost/benefit related to pension and other postretirement benefits	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$4.00M	USD	1 Quarter
Change in unrecognized net actuarial gain/loss and prior service cost/benefit related to pension and other postretirement benefits	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$4.00M	USD	1 Quarter
Foreign currency translation adjustments, Alcoa Corporation	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent`	$2.00M	USD	1 Quarter
Foreign currency translation adjustments, Alcoa Corporation	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent`	$2.00M	USD	1 Quarter
Foreign currency translation adjustments, Alcoa Corporation	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent`	$-122.00M	USD	1 Quarter
Foreign currency translation adjustments, Alcoa Corporation	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent`	$-122.00M	USD	1 Quarter
Foreign currency translation adjustments, Noncontrolling interest	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest`	$15.00M	USD	1 Quarter
Foreign currency translation adjustments, Noncontrolling interest	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest`	$15.00M	USD	1 Quarter
Foreign currency translation adjustments, Noncontrolling interest	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest`	$-54.00M	USD	1 Quarter
Foreign currency translation adjustments, Noncontrolling interest	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest`	$-54.00M	USD	1 Quarter
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$-176.00M	USD	1 Quarter
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$-176.00M	USD	1 Quarter
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$17.00M	USD	1 Quarter
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$17.00M	USD	1 Quarter
Net change in unrecognized gains/losses on cash flow hedges, Alcoa Corporation	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent`	$-122.00M	USD	1 Quarter
Net change in unrecognized gains/losses on cash flow hedges, Alcoa Corporation	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent`	$-122.00M	USD	1 Quarter
Net change in unrecognized gains/losses on cash flow hedges, Alcoa Corporation	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent`	$130.00M	USD	1 Quarter
Net change in unrecognized gains/losses on cash flow hedges, Alcoa Corporation	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent`	$130.00M	USD	1 Quarter
Net change in unrecognized gains/losses on cash flow hedges	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax`	$-122.00M	USD	1 Quarter
Net change in unrecognized gains/losses on cash flow hedges	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax`	$-122.00M	USD	1 Quarter
Net change in unrecognized gains/losses on cash flow hedges	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax`	$130.00M	USD	1 Quarter
Net change in unrecognized gains/losses on cash flow hedges	`OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax`	$130.00M	USD	1 Quarter
Total Other comprehensive income (loss), net of tax, Alcoa Corporation	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-116.00M	USD	1 Quarter
Total Other comprehensive income (loss), net of tax, Alcoa Corporation	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-116.00M	USD	1 Quarter
Total Other comprehensive income (loss), net of tax, Alcoa Corporation	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$17.00M	USD	1 Quarter
Total Other comprehensive income (loss), net of tax, Alcoa Corporation	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$17.00M	USD	1 Quarter
Total Other comprehensive income (loss), net of tax, Noncontrolling interest	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest`	$-53.00M	USD	1 Quarter
Total Other comprehensive income (loss), net of tax, Noncontrolling interest	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest`	$-53.00M	USD	1 Quarter
Total Other comprehensive income (loss), net of tax, Noncontrolling interest	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest`	$15.00M	USD	1 Quarter
Total Other comprehensive income (loss), net of tax, Noncontrolling interest	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest`	$15.00M	USD	1 Quarter
Total Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$-36.00M	USD	1 Quarter
Total Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$-36.00M	USD	1 Quarter
Total Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$-101.00M	USD	1 Quarter
Total Other comprehensive income (loss), net of tax	`OtherComprehensiveIncomeLossNetOfTax`	$-101.00M	USD	1 Quarter
Comprehensive (loss) income , Alcoa Corporation	`ComprehensiveIncomeNetOfTax`	$-347.00M	USD	1 Quarter
Comprehensive (loss) income , Alcoa Corporation	`ComprehensiveIncomeNetOfTax`	$-347.00M	USD	1 Quarter
Comprehensive (loss) income , Alcoa Corporation	`ComprehensiveIncomeNetOfTax`	$-235.00M	USD	1 Quarter
Comprehensive (loss) income , Alcoa Corporation	`ComprehensiveIncomeNetOfTax`	$-235.00M	USD	1 Quarter
Comprehensive (loss) income , Noncontrolling interest	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$14.00M	USD	1 Quarter
Comprehensive (loss) income , Noncontrolling interest	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$14.00M	USD	1 Quarter
Comprehensive (loss) income , Noncontrolling interest	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-108.00M	USD	1 Quarter
Comprehensive (loss) income , Noncontrolling interest	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-108.00M	USD	1 Quarter
Comprehensive (loss) income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$-343.00M	USD	1 Quarter
Comprehensive (loss) income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$-343.00M	USD	1 Quarter
Comprehensive (loss) income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$-333.00M	USD	1 Quarter
Comprehensive (loss) income	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$-333.00M	USD	1 Quarter

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