$HWM
Howmet Aerospace Inc. Stock $hwm

$hwm Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000000428120000038 Filed on February 27, 2020

Income Statement

Concept	2019 Q4	2019 Q3	2019 Q2
Revenue	$1.734B	$3.559B	$3.691B
YoY Change	-50.06%	0.99%	3.3%
Cost Of Revenue	$1.269B	$1.317B	$1.335B
YoY Change	-136.91%	-54.29%	-54.01%
Gross Profit	$465.0M	$477.0M	$483.0M
YoY Change	-242.64%	-25.82%	-27.91%
Gross Profit Margin	26.82%	13.4%	13.09%
Selling, General & Admin	$93.00M	$89.00M	$102.0M
YoY Change	-200.0%	-33.58%	-35.44%
% of Gross Profit	20.0%	18.66%	21.12%
Research & Development	$6.000M	$6.000M	$7.000M
YoY Change	-116.67%	-76.0%	-75.86%
% of Gross Profit	1.29%	1.26%	1.45%
Depreciation & Amortization	$129.0M	$131.0M	$139.0M
YoY Change	-13.42%	-7.09%	-3.47%
% of Gross Profit	27.74%	27.46%	28.78%
Operating Expenses	$170.0M	$95.00M	$109.0M
YoY Change	-170.25%	-40.25%	-41.71%
Operating Profit	$295.0M	$256.0M	-$176.0M
YoY Change	-451.19%	-25.8%	-154.32%
Interest Expense	-$75.00M	$85.00M	$86.00M
YoY Change	8.7%	-3.41%	-3.37%
% of Operating Profit	-25.42%	33.2%
Other Income/Expense, Net	-$11.00M	-$8.000M	-$6.000M
YoY Change	-112.94%	0.0%	-85.37%
Pretax Income	$198.0M	$163.0M	-$268.0M
YoY Change	-192.52%	-34.54%	-238.14%
Income Tax	$80.00M	$105.0M	-$132.0M
% Of Pretax Income	40.4%	64.42%
Net Earnings	$309.0M	$95.00M	-$121.0M
YoY Change	41.74%	-40.99%	-200.83%
Net Earnings / Revenue	17.82%	2.67%	-3.28%
Basic Earnings Per Share	$0.71	$0.22	-$0.27
Diluted Earnings Per Share	$0.70	$0.21	-$0.27
COMMON SHARES
Basic Shares Outstanding	432.9M shares	436.0M shares	445.0M shares
Diluted Shares Outstanding		457.0M shares	445.0M shares

Balance Sheet

Concept	2019 Q4	2019 Q3	2019 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.577B	$1.321B	$1.357B
YoY Change	-30.74%	-13.94%	-6.74%
Cash & Equivalents	$1.577B	$1.321B	$1.357B
Short-Term Investments
Other Short-Term Assets	$1.727B	$259.0M	$260.0M
YoY Change	450.0%	-18.3%	-19.75%
Inventory	$1.607B	$2.555B	$2.606B
Prepaid Expenses
Receivables	$583.0M	$1.116B	$1.155B
Other Receivables	$349.0M	$657.0M	$640.0M
Total Short-Term Assets	$5.843B	$5.908B	$6.018B
YoY Change	-11.21%	-3.65%	-0.94%
LONG-TERM ASSETS
Property, Plant & Equipment	$2.629B	$5.377B	$5.517B
YoY Change	-53.91%	-4.75%	-1.16%
Goodwill	$4.067B	$4.460B	$4.500B
YoY Change	-2.84%	-1.26%	-0.4%
Intangibles	$599.0M	$668.0M	$686.0M
YoY Change	-34.82%	-29.98%	-28.76%
Long-Term Investments
YoY Change
Other Assets	$316.0M	$605.0M	$624.0M
YoY Change	-24.04%	27.64%	37.14%
Total Long-Term Assets	$11.72B	$11.58B	$11.90B
YoY Change	-3.24%	-5.08%	-2.05%
TOTAL ASSETS
Total Short-Term Assets	$5.843B	$5.908B	$6.018B
Total Long-Term Assets	$11.72B	$11.58B	$11.90B
Total Assets	$17.56B	$17.48B	$17.91B
YoY Change	-6.05%	-4.6%	-1.68%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$976.0M	$1.988B	$2.095B
YoY Change	-54.16%	-3.54%	3.51%
Accrued Expenses	$435.0M	$563.0M	$574.0M
YoY Change	-9.94%	23.46%	20.34%
Deferred Revenue
YoY Change
Short-Term Debt	$1.034B	$1.434B	$434.0M
YoY Change	138.25%	3314.29%	864.44%
Long-Term Debt Due	$1.034B	$1.404B	$405.0M
YoY Change	155.31%	46700.0%	13400.0%
Total Short-Term Liabilities	$4.125B	$4.460B	$3.621B
YoY Change	17.19%	47.98%	21.63%
LONG-TERM LIABILITIES
Long-Term Debt	$4.906B	$4.905B	$5.901B
YoY Change	-16.79%	-22.33%	-6.51%
Other Long-Term Liabilities	$3.926B	$3.409B	$3.525B
YoY Change	6.34%	-5.91%	-5.04%
Total Long-Term Liabilities	$4.906B	$4.905B	$5.901B
YoY Change	-16.79%	-22.33%	-6.51%
TOTAL LIABILITIES
Total Short-Term Liabilities	$4.125B	$4.460B	$3.621B
Total Long-Term Liabilities	$4.906B	$4.905B	$5.901B
Total Liabilities	$12.96B	$12.77B	$13.05B
YoY Change	-1.15%	-1.37%	0.35%
SHAREHOLDERS EQUITY
Retained Earnings	$113.0M	-$179.0M	-$256.0M
YoY Change	-131.56%	-81.02%	-76.14%
Common Stock	$433.0M	$434.0M	$440.0M
YoY Change	-10.35%	-10.14%	-8.9%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$4.591B	$4.696B	$4.854B
YoY Change
Total Liabilities & Shareholders Equity	$17.56B	$17.48B	$17.91B
YoY Change	-6.05%	-4.6%	-1.68%

Cashflow Statement

Concept	2019 Q4	2019 Q3	2019 Q2
OPERATING ACTIVITIES
Net Income	$309.0M	$95.00M	-$121.0M
YoY Change	41.74%	-40.99%	-200.83%
Depreciation, Depletion And Amortization	$129.0M	$131.0M	$139.0M
YoY Change	-13.42%	-7.09%	-3.47%
Cash From Operating Activities	$561.0M	$52.00M	$106.0M
YoY Change	31.69%	1.96%	-39.77%
INVESTING ACTIVITIES
Capital Expenditures	-$226.0M	$127.0M	-$136.0M
YoY Change	-16.61%	-160.77%	-20.47%
Acquisitions
YoY Change
Other Investing Activities	$466.0M	$228.0M	$265.0M
YoY Change	-25.44%	-16.79%	-7.99%
Cash From Investing Activities	$240.0M	$117.0M	$129.0M
YoY Change	-32.2%	80.0%	10.26%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-424.0M	-202.0M	-201.0M
YoY Change	960.0%	531.25%	474.29%
NET CHANGE
Cash From Operating Activities	561.0M	52.00M	106.0M
Cash From Investing Activities	240.0M	117.0M	129.0M
Cash From Financing Activities	-424.0M	-202.0M	-201.0M
Net Change In Cash	377.0M	-33.00M	34.00M
YoY Change	-49.05%	-139.29%	-86.82%
FREE CASH FLOW
Cash From Operating Activities	$561.0M	$52.00M	$106.0M
Capital Expenditures	-$226.0M	$127.0M	-$136.0M
Free Cash Flow	$787.0M	-$75.00M	$242.0M
YoY Change	12.91%	-128.85%	-30.26%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2019Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.02
CY2019	dei	City Area Code CityAreaCode	412
CY2019	arnc	Average Period Of Historical Returns Used To Calculate Expected Future Returns AveragePeriodOfHistoricalReturnsUsedToCalculateExpectedFutureReturns	P5Y
CY2019	arnc	Basis Point Of Decrease Identified In Long Term Rate Of Return BasisPointOfDecreaseIdentifiedInLongTermRateOfReturn	0.0075
CY2017	arnc	Estimated Percentage Of Compensation Expense In Performance Based Award Payouts EstimatedPercentageOfCompensationExpenseInPerformanceBasedAwardPayouts	0.85
CY2019Q4	arnc	Insurance Policy Term InsurancePolicyTerm	P1Y
CY2018Q2	arnc	Labor Agreement Duration LaborAgreementDuration	P5Y
CY2019Q2	arnc	Labor Agreement Term LaborAgreementTerm	P3Y
CY2019Q3	arnc	Labor Agreement Term LaborAgreementTerm	P4Y
CY2019	arnc	Period Required For One Quantitative Impairment Test To Be Performed For Each Reporting Unit PeriodRequiredForOneQuantitativeImpairmentTestToBePerformedForEachReportingUnit	P3Y
CY2014Q3	arnc	Preferred Stock Conversion Rate Per Share PreferredStockConversionRatePerShare	0.10
CY2019	arnc	Revenue Terms Of Payment Period RevenueTermsOfPaymentPeriod	P30D
CY2019	dei	Amendment Flag AmendmentFlag	false
CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019	dei	Document Period End Date DocumentPeriodEndDate	2019-12-31
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0000004281
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	4000000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	3000000	USD
CY2017Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.06
CY2017Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.06
CY2017Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.06
CY2017Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.06
CY2017	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.24
CY2019Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.02
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.24
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.24
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	432855183	shares
CY2017	us-gaap	Defined Benefit Plan Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate	2021
CY2018	us-gaap	Defined Benefit Plan Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate	2022
CY2019	us-gaap	Defined Benefit Plan Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate DefinedBenefitPlanYearHealthCareCostTrendRateReachesUltimateTrendRate	2023
CY2017Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	0	USD
CY2018Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	0	USD
CY2019	dei	Document Type DocumentType	10-K
CY2019	dei	Local Phone Number LocalPhoneNumber	553-1940
CY2019	dei	Entity Small Business EntitySmallBusiness	false
CY2019	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2019	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2019	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2019	dei	Entity Shell Company EntityShellCompany	false
CY2019Q2	dei	Entity Public Float EntityPublicFloat	11000000000	USD
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CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	14192000000	USD
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CY2017	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	109000000	USD
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	536000000	USD
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	576000000	USD
CY2017	us-gaap	Depreciation And Amortization DepreciationAndAmortization	551000000	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
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CY2018	us-gaap	Restructuring Charges RestructuringCharges	9000000	USD
CY2017	us-gaap	Restructuring Charges RestructuringCharges	165000000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	1035000000	USD
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CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	480000000	USD
CY2019	us-gaap	Interest Expense InterestExpense	338000000	USD
CY2018	us-gaap	Interest Expense InterestExpense	378000000	USD
CY2017	us-gaap	Interest Expense InterestExpense	496000000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-122000000	USD
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CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	486000000	USD
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CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	105000000	USD
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CY2019	us-gaap	Net Income Loss NetIncomeLoss	470000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	642000000	USD
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CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
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CY2019	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2019	dei	Entity File Number EntityFileNumber	1-3610
CY2019	dei	Entity Registrant Name EntityRegistrantName	ARCONIC INC.
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	25-0317820
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	201 Isabella Street, Suite 200
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CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	PA
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	15212-5872
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CY2019	us-gaap	Profit Loss ProfitLoss	470000000	USD
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CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	3000000	USD
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CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	85000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-74000000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	69000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	727000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-148000000	USD
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CY2019Q4	us-gaap	Goodwill Goodwill	4493000000	USD
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CY2019Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	418000000	USD
CY2018Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	356000000	USD
CY2019Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	1034000000	USD
CY2018Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	434000000	USD
CY2019Q4	us-gaap	Liabilities Current LiabilitiesCurrent	4126000000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	3520000000	USD
CY2019Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	4906000000	USD
CY2018Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	5896000000	USD
CY2019Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	2460000000	USD
CY2018Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	2230000000	USD
CY2019Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	714000000	USD
CY2018Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	723000000	USD
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CY2018Q4	us-gaap	Deferred Credits And Other Liabilities Noncurrent DeferredCreditsAndOtherLiabilitiesNoncurrent	739000000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	12957000000	USD
CY2018Q4	us-gaap	Liabilities Liabilities	13108000000	USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	us-gaap	Preferred Stock Value PreferredStockValue	55000000	USD
CY2018Q4	us-gaap	Preferred Stock Value PreferredStockValue	55000000	USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	433000000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	483000000	USD
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CY2018Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	8319000000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	129000000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-358000000	USD
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CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-2926000000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	4607000000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	5573000000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	18693000000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	470000000	USD
CY2019Q4	us-gaap	Minority Interest MinorityInterest	14000000	USD
CY2018Q4	us-gaap	Minority Interest MinorityInterest	12000000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4621000000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5585000000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	17578000000	USD
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CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
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CY2017	us-gaap	Profit Loss ProfitLoss	-74000000	USD
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CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	576000000	USD
CY2019	arnc	Restructuring And Other Charges RestructuringAndOtherCharges	620000000	USD
CY2018	arnc	Restructuring And Other Charges RestructuringAndOtherCharges	9000000	USD
CY2017	arnc	Restructuring And Other Charges RestructuringAndOtherCharges	165000000	USD
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CY2018	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	-10000000	USD
CY2017	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	513000000	USD
CY2019	arnc	Defined Benefit Pension Plans Net Periodic Benefit Cost DefinedBenefitPensionPlansNetPeriodicBenefitCost	115000000	USD
CY2018	arnc	Defined Benefit Pension Plans Net Periodic Benefit Cost DefinedBenefitPensionPlansNetPeriodicBenefitCost	130000000	USD
CY2017	arnc	Defined Benefit Pension Plans Net Periodic Benefit Cost DefinedBenefitPensionPlansNetPeriodicBenefitCost	217000000	USD
CY2019	arnc	Increase Decrease In Sharebased Compensation IncreaseDecreaseInSharebasedCompensation	60000000	USD
CY2018	arnc	Increase Decrease In Sharebased Compensation IncreaseDecreaseInSharebasedCompensation	50000000	USD
CY2017	arnc	Increase Decrease In Sharebased Compensation IncreaseDecreaseInSharebasedCompensation	67000000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-13000000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-75000000	USD
CY2017	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-112000000	USD
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CY2018	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	1142000000	USD
CY2017	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	915000000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	3000000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	74000000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	192000000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-4000000	USD
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CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-11000000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	-56000000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	339000000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	62000000	USD
CY2019	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-42000000	USD
CY2018	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-190000000	USD
CY2017	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-116000000	USD
CY2019	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	-2000000	USD
CY2018	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	104000000	USD
CY2017	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	-23000000	USD
CY2019	us-gaap	Pension Contributions PensionContributions	268000000	USD
CY2018	us-gaap	Pension Contributions PensionContributions	298000000	USD
CY2017	us-gaap	Pension Contributions PensionContributions	310000000	USD
CY2019	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	7000000	USD
CY2018	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	20000000	USD
CY2017	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	41000000	USD
CY2019	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-45000000	USD
CY2018	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-24000000	USD
CY2017	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-193000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	406000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	217000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-39000000	USD
CY2019	us-gaap	Proceeds From Repayments Of Short Term Debt Maturing In Three Months Or Less ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess	2000000	USD
CY2018	us-gaap	Proceeds From Repayments Of Short Term Debt Maturing In Three Months Or Less ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess	-7000000	USD
CY2017	us-gaap	Proceeds From Repayments Of Short Term Debt Maturing In Three Months Or Less ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess	-2000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	400000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	600000000	USD
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CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	806000000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1103000000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1634000000	USD
CY2019	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	0	USD
CY2018	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	17000000	USD
CY2017	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	52000000	USD
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CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	16000000	USD
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	50000000	USD
CY2019	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	57000000	USD
CY2018	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	119000000	USD
CY2017	us-gaap	Payments Of Ordinary Dividends PaymentsOfOrdinaryDividends	162000000	USD
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CY2018	us-gaap	Payments Of Distributions To Affiliates PaymentsOfDistributionsToAffiliates	0	USD
CY2017	us-gaap	Payments Of Distributions To Affiliates PaymentsOfDistributionsToAffiliates	14000000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1150000000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	768000000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	596000000	USD
CY2019	us-gaap	Proceeds From Sales Of Business Affiliate And Productive Assets ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets	103000000	USD
CY2018	us-gaap	Proceeds From Sales Of Business Affiliate And Productive Assets ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets	309000000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-13000000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-19000000	USD
CY2017	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-17000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1568000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-649000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1015000000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	586000000	USD
CY2017	us-gaap	Proceeds From Sales Of Business Affiliate And Productive Assets ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets	-9000000	USD
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CY2017	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	-890000000	USD
CY2019	us-gaap	Proceeds From Sale Of Finance Receivables ProceedsFromSaleOfFinanceReceivables	995000000	USD
CY2018	us-gaap	Proceeds From Sale Of Finance Receivables ProceedsFromSaleOfFinanceReceivables	1016000000	USD
CY2017	us-gaap	Proceeds From Sale Of Finance Receivables ProceedsFromSaleOfFinanceReceivables	792000000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	2000000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	1000000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-243000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	583000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	565000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	1320000000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	0	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-4000000	USD
CY2017	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	9000000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-579000000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	129000000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	275000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2282000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2153000000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1878000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1703000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2282000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2153000000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5141000000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	-74000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-74000000	USD
CY2017	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	109000000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	67000000	USD
CY2017	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	21000000	USD
CY2017	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	0	USD
CY2017	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	4000000	USD
CY2017	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	14000000	USD
CY2017	us-gaap	Stockholders Equity Other StockholdersEquityOther	-15000000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4924000000	USD
CY2018Q1	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	0	USD
CY2018	us-gaap	Profit Loss ProfitLoss	642000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	85000000	USD
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	117000000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	50000000	USD
CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	5000000	USD
CY2018	us-gaap	Stockholders Equity Other StockholdersEquityOther	2000000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5585000000	USD
CY2019Q1	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	73000000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	470000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-401000000	USD
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	56000000	USD
CY2019	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	1150000000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	57000000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	41000000	USD
CY2019	us-gaap	Stockholders Equity Other StockholdersEquityOther	-4000000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4621000000	USD
CY2016	us-gaap	Number Of Reporting Units NumberOfReportingUnits	7	reporting_unit
CY2019	arnc	Minimum Percentage Of Estimated Fair Value Of Reporting Unit To Be Less Than Carrying Amount Of Goodwill MinimumPercentageOfEstimatedFairValueOfReportingUnitToBeLessThanCarryingAmountOfGoodwill	0.50
CY2019	us-gaap	Number Of Reporting Units NumberOfReportingUnits	7	reporting_unit
CY2019	us-gaap	Number Of Reporting Units NumberOfReportingUnits	7	reporting_unit
CY2019Q4	us-gaap	Reporting Unit Percentage Of Fair Value In Excess Of Carrying Amount ReportingUnitPercentageOfFairValueInExcessOfCarryingAmount	0.50
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2019	arnc	Discontinued Operations Businesses Expected To Be Disposed Within Certain Years DiscontinuedOperationsBusinessesExpectedToBeDisposedWithinCertainYears	P1Y
CY2019Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	320000000	USD
CY2019Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	119000000	USD
CY2019Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	24000000	USD
CY2019Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	22000000	USD
CY2018Q4	us-gaap	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Transition Tax For Accumulated Foreign Earnings Provisional Income Tax Expense TaxCutsAndJobsActOf2017IncompleteAccountingTransitionTaxForAccumulatedForeignEarningsProvisionalIncomeTaxExpense	-367000000	USD
CY2019	arnc	Segment Reporting Information Profits Losses SegmentReportingInformationProfitsLosses	2015000000	USD
CY2019	arnc	Segment Reporting Information Restructuring And Other Charges SegmentReportingInformationRestructuringAndOtherCharges	590000000	USD
CY2019	arnc	Segment Reporting Information Depreciation And Amortization Expense SegmentReportingInformationDepreciationAndAmortizationExpense	502000000	USD
CY2019	arnc	Segment Reporting Information Capital Expenditures SegmentReportingInformationCapitalExpenditures	533000000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	4493000000	USD
CY2018	arnc	Segment Reporting Information Capital Expenditures SegmentReportingInformationCapitalExpenditures	715000000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	4500000000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	14192000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	14014000000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	12960000000	USD
CY2019	arnc	Segment Reporting Information Profits Losses SegmentReportingInformationProfitsLosses	2015000000	USD
CY2018	arnc	Segment Reporting Information Profits Losses SegmentReportingInformationProfitsLosses	1586000000	USD
CY2017	arnc	Segment Reporting Information Profits Losses SegmentReportingInformationProfitsLosses	1689000000	USD
CY2019Q4	us-gaap	Assets Assets	17578000000	USD
CY2018Q4	us-gaap	Assets Assets	18693000000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	14192000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	14014000000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	12960000000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	14192000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	14014000000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	12960000000	USD
CY2019Q4	arnc	Property Plant And Equipment And Operating Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndOperatingLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	5714000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	5704000000	USD
CY2018	arnc	Contract With Customer Claims For New Product Introductions ContractWithCustomerClaimsForNewProductIntroductions	38000000	USD
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	570000000	USD
CY2018	us-gaap	Asset Impairment Charges AssetImpairmentCharges	13000000	USD
CY2017	us-gaap	Asset Impairment Charges AssetImpairmentCharges	58000000	USD
CY2019	us-gaap	Severance Costs1 SeveranceCosts1	103000000	USD
CY2018	us-gaap	Severance Costs1 SeveranceCosts1	20000000	USD
CY2017	us-gaap	Severance Costs1 SeveranceCosts1	64000000	USD
CY2019	us-gaap	Pension And Other Postretirement Benefits Expense Reversal Of Expense Noncash PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash	-49000000	USD
CY2018	us-gaap	Pension And Other Postretirement Benefits Expense Reversal Of Expense Noncash PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash	91000000	USD
CY2017	us-gaap	Pension And Other Postretirement Benefits Expense Reversal Of Expense Noncash PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash	0	USD
CY2019	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	20000000	USD
CY2018	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	109000000	USD
CY2017	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	-57000000	USD
CY2019	arnc	Other Costs Related To Restructuring OtherCostsRelatedToRestructuring	26000000	USD
CY2018	arnc	Other Costs Related To Restructuring OtherCostsRelatedToRestructuring	13000000	USD
CY2017	arnc	Other Costs Related To Restructuring OtherCostsRelatedToRestructuring	-3000000	USD
CY2019	arnc	Reversals Of Previously Recorded Layoff ReversalsOfPreviouslyRecordedLayoff	10000000	USD
CY2018	arnc	Reversals Of Previously Recorded Layoff ReversalsOfPreviouslyRecordedLayoff	19000000	USD
CY2017	arnc	Reversals Of Previously Recorded Layoff ReversalsOfPreviouslyRecordedLayoff	11000000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	620000000	USD
CY2018	us-gaap	Restructuring Charges RestructuringCharges	9000000	USD
CY2017	us-gaap	Restructuring Charges RestructuringCharges	165000000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	620000000	USD
CY2019	arnc	Restructuring And Other Charges After Tax RestructuringAndOtherChargesAfterTax	512000000	USD
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	570000000	USD
CY2019	arnc	Asset Impairment Charges Net Of Tax AssetImpairmentChargesNetOfTax	477000000	USD
CY2018	us-gaap	Restructuring Charges RestructuringCharges	9000000	USD
CY2018	arnc	Restructuring And Other Charges After Tax RestructuringAndOtherChargesAfterTax	9000000	USD
CY2018	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	109000000	USD
CY2018	arnc	Gain Loss On Disposition Of Assets Net Of Tax GainLossOnDispositionOfAssetsNetOfTax	81000000	USD
CY2017	us-gaap	Restructuring Charges RestructuringCharges	165000000	USD
CY2017	arnc	Restructuring And Other Charges After Tax RestructuringAndOtherChargesAfterTax	143000000	USD
CY2017	us-gaap	Restructuring And Related Cost Number Of Positions Eliminated RestructuringAndRelatedCostNumberOfPositionsEliminated	880	position
CY2017	arnc	Reversal Of Forfeited Executive Stock Compensation ReversalOfForfeitedExecutiveStockCompensation	13000000	USD
CY2016Q4	us-gaap	Restructuring Reserve RestructuringReserve	59000000	USD
CY2017	us-gaap	Payments For Restructuring PaymentsForRestructuring	65000000	USD
CY2017	arnc	Restructuring Reserve Period Expenses RestructuringReservePeriodExpenses	65000000	USD
CY2017	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	-1000000	USD
CY2017Q4	us-gaap	Restructuring Reserve RestructuringReserve	58000000	USD
CY2018	us-gaap	Payments For Restructuring PaymentsForRestructuring	49000000	USD
CY2018	arnc	Restructuring Reserve Period Expenses RestructuringReservePeriodExpenses	124000000	USD
CY2018	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	-108000000	USD
CY2018Q4	us-gaap	Restructuring Reserve RestructuringReserve	25000000	USD
CY2019	us-gaap	Payments For Restructuring PaymentsForRestructuring	79000000	USD
CY2019	arnc	Restructuring Reserve Period Expenses RestructuringReservePeriodExpenses	630000000	USD
CY2019	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	-542000000	USD
CY2019Q4	us-gaap	Restructuring Reserve RestructuringReserve	34000000	USD
CY2019	us-gaap	Interest Expense InterestExpense	338000000	USD
CY2018	us-gaap	Interest Expense InterestExpense	378000000	USD
CY2017	us-gaap	Interest Expense InterestExpense	496000000	USD
CY2019	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	33000000	USD
CY2018	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	23000000	USD
CY2017	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	22000000	USD
CY2019	us-gaap	Interest Costs Incurred InterestCostsIncurred	371000000	USD
CY2018	us-gaap	Interest Costs Incurred InterestCostsIncurred	401000000	USD
CY2017	us-gaap	Interest Costs Incurred InterestCostsIncurred	518000000	USD
CY2019	arnc	Net Periodic Benefit Cost Nonservice NetPeriodicBenefitCostNonservice	116000000	USD
CY2018	arnc	Net Periodic Benefit Cost Nonservice NetPeriodicBenefitCostNonservice	112000000	USD
CY2017	arnc	Net Periodic Benefit Cost Nonservice NetPeriodicBenefitCostNonservice	154000000	USD
CY2019	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	25000000	USD
CY2018	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	23000000	USD
CY2017	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	19000000	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	1000000	USD
CY2018	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-26000000	USD
CY2017	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	5000000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-7000000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-10000000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	513000000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-25000000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	46000000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	103000000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-122000000	USD
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-79000000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	486000000	USD
CY2018Q4	arnc	Tax Agreement Indemnificationof Ultimate Liability Percent TaxAgreementIndemnificationofUltimateLiabilityPercent	0.49
CY2017	us-gaap	Cost Method Investments Realized Gain Loss CostMethodInvestmentsRealizedGainLoss	167000000	USD
CY2018Q2	arnc	Labor Agreement Number Of Employees LaborAgreementNumberOfEmployees	1300	employee
CY2018Q2	arnc	Defined Benefit Plan Labor Agreement Employees Subject To Retirement Benefit Increase DefinedBenefitPlanLaborAgreementEmployeesSubjectToRetirementBenefitIncrease	300	employee
	us-gaap	Defined Benefit Plan Recognized Net Gain Loss Due To Curtailments DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments	-9000000	USD
CY2019Q2	arnc	Labor Agreement Number Of Employees LaborAgreementNumberOfEmployees	3400	employee
CY2019	arnc	Labor Agreement One Time Signing Bonus LaborAgreementOneTimeSigningBonus	9000000	USD
CY2019Q3	arnc	Labor Agreement Number Of Employees LaborAgreementNumberOfEmployees	560	employee
CY2019Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0330
CY2018Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0435
CY2019Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease	0
CY2018Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease	0.0350
CY2019	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Change Due To Subsequent Interim Measurement Weighted Average Expected Long Term Rate Of Return On Plan Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostChangeDueToSubsequentInterimMeasurementWeightedAverageExpectedLongTermRateOfReturnOnPlanAssets	0.0300
CY2018	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Change Due To Subsequent Interim Measurement Weighted Average Expected Long Term Rate Of Return On Plan Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostChangeDueToSubsequentInterimMeasurementWeightedAverageExpectedLongTermRateOfReturnOnPlanAssets	0.0300
CY2019	arnc	Defined Benefit Plan Fair Value Assumptions Average Duration Refined Yield Curve Model Parallels Plans DefinedBenefitPlanFairValueAssumptionsAverageDurationRefinedYieldCurveModelParallelsPlans	P10Y
CY2019	arnc	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Service Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostServiceCostDiscountRate	0.0435
CY2018	arnc	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Service Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostServiceCostDiscountRate	0.0375
CY2017	arnc	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Service Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostServiceCostDiscountRate	0.0420
CY2019	arnc	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Interest Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostInterestCostDiscountRate	0.0400
CY2018	arnc	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Interest Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostInterestCostDiscountRate	0.0330
CY2017	arnc	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Interest Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostInterestCostDiscountRate	0.0360
CY2019	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.0700
CY2018	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.0700
CY2017	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Expected Long Term Return On Assets DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets	0.0775
CY2019	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease	0.0350
CY2018	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease	0.0350
CY2017	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease	0.0350
CY2019	arnc	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Cash Balance Plan Interest Crediting Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostCashBalancePlanInterestCreditingRate	0.0300
CY2018	arnc	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Cash Balance Plan Interest Crediting Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostCashBalancePlanInterestCreditingRate	0.0300
CY2017	arnc	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Cash Balance Plan Interest Crediting Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostCashBalancePlanInterestCreditingRate	0.0300
CY2019	arnc	No Of Year Over Actual Annual Healthcare Cost Trend Experience NoOfYearOverActualAnnualHealthcareCostTrendExperience	P20Y
CY2019Q4	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear	0.0550
CY2018Q4	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear	0.0550
CY2017Q4	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear	0.0550
CY2019Q4	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate1 DefinedBenefitPlanUltimateHealthCareCostTrendRate1	0.0450
CY2018Q4	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate1 DefinedBenefitPlanUltimateHealthCareCostTrendRate1	0.0450
CY2017Q4	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate1 DefinedBenefitPlanUltimateHealthCareCostTrendRate1	0.0450
CY2019Q4	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear	0.055
CY2019	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Accumulated Postretirement Benefit Obligation DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation	23000000	USD
CY2019	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Decrease On Accumulated Postretirement Benefit Obligation1 DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1	22000000	USD
CY2019	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Service And Interest Cost Components DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents	1000000	USD
CY2019	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Decrease On Service And Interest Cost Components1 DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1	1000000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Weighted Average Asset Allocations DefinedBenefitPlanWeightedAverageAssetAllocations	1
CY2018Q4	us-gaap	Defined Benefit Plan Weighted Average Asset Allocations DefinedBenefitPlanWeightedAverageAssetAllocations	1
CY2019Q4	arnc	Payables Excluded From Pension Plan Assets PayablesExcludedFromPensionPlanAssets	7000000	USD
CY2018Q4	arnc	Receivables Excluded From Pension Plan Assets ReceivablesExcludedFromPensionPlanAssets	1000000	USD
CY2019	us-gaap	Pension Contributions PensionContributions	268000000	USD
CY2018	us-gaap	Pension Contributions PensionContributions	298000000	USD
CY2019	us-gaap	Pension Contributions PensionContributions	268000000	USD
CY2018	arnc	Payment For Pension Benefit Plan In Excess Of Minimum Required PaymentForPensionBenefitPlanInExcessOfMinimumRequired	53000000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Expected Future Employer Contributions Next Fiscal Year DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear	475000000	USD
CY2016Q4	arnc	Aggregate Cash Contribution To Pension Plan AggregateCashContributionToPensionPlan	150000000	USD
CY2016Q4	arnc	Cash Contribution Term To Pension Plan CashContributionTermToPensionPlan	P30M
CY2019Q2	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	34000000	USD
CY2018Q1	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	66000000	USD
CY2017Q2	us-gaap	Pension And Other Postretirement Benefit Contributions PensionAndOtherPostretirementBenefitContributions	50000000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	125000000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	123000000	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	89000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	275000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	518000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	500000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	300000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	350000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-30000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	575000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	868000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	470000000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	4000000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	45000000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	108000000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	138000000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	98000000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	5000000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	4000000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-2000000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	117000000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	187000000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	96000000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	65000000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	146000000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	489000000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-53000000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-94000000	USD
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	37000000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-24000000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-13000000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-78000000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-12000000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	39000000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	448000000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	105000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	226000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	544000000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.026
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.024
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.087
CY2019	arnc	Effective Income Tax Reconciliation United States And Residual Tax On Foreign Earnings Percent EffectiveIncomeTaxReconciliationUnitedStatesAndResidualTaxOnForeignEarningsPercent	0.060
CY2018	arnc	Effective Income Tax Reconciliation United States And Residual Tax On Foreign Earnings Percent EffectiveIncomeTaxReconciliationUnitedStatesAndResidualTaxOnForeignEarningsPercent	0.016
CY2017	arnc	Effective Income Tax Reconciliation United States And Residual Tax On Foreign Earnings Percent EffectiveIncomeTaxReconciliationUnitedStatesAndResidualTaxOnForeignEarningsPercent	-0.001
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.025
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.015
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.007
CY2019	arnc	Effective Income Tax Rate Reconciliation Federal Benefit Of State Taxes Percent EffectiveIncomeTaxRateReconciliationFederalBenefitOfStateTaxesPercent	0.004
CY2018	arnc	Effective Income Tax Rate Reconciliation Federal Benefit Of State Taxes Percent EffectiveIncomeTaxRateReconciliationFederalBenefitOfStateTaxesPercent	-0.003
CY2017	arnc	Effective Income Tax Rate Reconciliation Federal Benefit Of State Taxes Percent EffectiveIncomeTaxRateReconciliationFederalBenefitOfStateTaxesPercent	0.037
CY2019	arnc	Effective Income Tax Rate Reconciliation Deductible Expense Restructuring Charges Percent EffectiveIncomeTaxRateReconciliationDeductibleExpenseRestructuringChargesPercent	0.229
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Holidays EffectiveIncomeTaxRateReconciliationTaxHolidays	0.030
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.142
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.009
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	1.379
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Impairment Losses EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Impairment Losses EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses	0
CY2018	arnc	Effective Income Tax Rate Reconciliation Deductible Expense Restructuring Charges Percent EffectiveIncomeTaxRateReconciliationDeductibleExpenseRestructuringChargesPercent	0.169
CY2017	arnc	Effective Income Tax Rate Reconciliation Deductible Expense Restructuring Charges Percent EffectiveIncomeTaxRateReconciliationDeductibleExpenseRestructuringChargesPercent	1.674
CY2019	arnc	Effective Income Tax Rate Reconciliation Nondeductible Expense Transaction Cost Percent EffectiveIncomeTaxRateReconciliationNondeductibleExpenseTransactionCostPercent	0.016
CY2018	arnc	Effective Income Tax Rate Reconciliation Nondeductible Expense Transaction Cost Percent EffectiveIncomeTaxRateReconciliationNondeductibleExpenseTransactionCostPercent	0
CY2017	arnc	Effective Income Tax Rate Reconciliation Nondeductible Expense Transaction Cost Percent EffectiveIncomeTaxRateReconciliationNondeductibleExpenseTransactionCostPercent	0.003
CY2019	arnc	Effective Income Tax Rate Reconciliation Nondeductible Officer Compensation Percent EffectiveIncomeTaxRateReconciliationNondeductibleOfficerCompensationPercent	0.018
CY2018	arnc	Effective Income Tax Rate Reconciliation Nondeductible Officer Compensation Percent EffectiveIncomeTaxRateReconciliationNondeductibleOfficerCompensationPercent	0.001
CY2017	arnc	Effective Income Tax Rate Reconciliation Nondeductible Officer Compensation Percent EffectiveIncomeTaxRateReconciliationNondeductibleOfficerCompensationPercent	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	-0.002
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.065
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.525
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Holidays EffectiveIncomeTaxRateReconciliationTaxHolidays	0.032
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Holidays EffectiveIncomeTaxRateReconciliationTaxHolidays	0.016
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Impairment Losses EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses	0.535
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	0.061
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	0.128
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	0.101
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Prior Year Income Taxes EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes	0.152
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Prior Year Income Taxes EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes	-0.026
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Prior Year Income Taxes EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes	-0.009
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.016
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.006
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.021
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.183
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.260
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	1.157
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CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	468000000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	640000000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-127000000	USD
CY2019	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	9000000	USD
CY2018	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	11000000	USD
CY2012Q1	arnc	Deferred Price Customer Receivables DeferredPriceCustomerReceivables	254000000	USD
CY2019	arnc	Net Cash Funding Received For Development Of Reserves During The Period NetCashFundingReceivedForDevelopmentOfReservesDuringThePeriod	300000000	USD
CY2019	arnc	Proceeds From Receivable Funding During The Period ProceedsFromReceivableFundingDuringThePeriod	3558000000	USD
CY2019	arnc	Repayments For Receivable Funding During The Period RepaymentsForReceivableFundingDuringThePeriod	3258000000	USD
CY2019	arnc	Funding Of Customer Receivables Sold FundingOfCustomerReceivablesSold	0	USD
CY2017	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	0	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	477000000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	651000000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-127000000	USD
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	446000000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	483000000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	451000000	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1000000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1000000	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	5000000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	5000000	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	0	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	11000000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	14000000	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	0	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	463000000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	503000000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	451000000	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	433000000	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	483000000	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Accelerated Share Repurchase Agreements IncrementalCommonSharesAttributableToAcceleratedShareRepurchaseAgreements	55000000	shares
CY2019	arnc	Weighted Average Exercise Price Of Underwater Options WeightedAverageExercisePriceOfUnderwaterOptions	35.75
CY2018	arnc	Weighted Average Exercise Price Of Underwater Options WeightedAverageExercisePriceOfUnderwaterOptions	26.79
CY2017	arnc	Weighted Average Exercise Price Of Underwater Options WeightedAverageExercisePriceOfUnderwaterOptions	33.32
CY2017Q1	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	0	USD
CY2017Q1	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	0	USD
CY2019	arnc	Number Of Arrangements To Sell Customer Receivables NumberOfArrangementsToSellCustomerReceivables	3	financial_institution
CY2012Q1	arnc	Sale Of Customer Receivables SaleOfCustomerReceivables	304000000	USD
CY2012Q1	us-gaap	Proceeds From Sale Of Finance Receivables ProceedsFromSaleOfFinanceReceivables	50000000	USD
CY2019	arnc	Cash Outflow Inflow From Deferred Purchase Receivable CashOutflowInflowFromDeferredPurchaseReceivable	6599000000	USD
CY2019	arnc	Cash Inflow Outflow From Deferred Purchase Receivable CashInflowOutflowFromDeferredPurchaseReceivable	6586000000	USD
CY2018	arnc	Cash Outflow Inflow From Deferred Purchase Receivable CashOutflowInflowFromDeferredPurchaseReceivable	6375000000	USD
CY2018	arnc	Cash Inflow Outflow From Deferred Purchase Receivable CashInflowOutflowFromDeferredPurchaseReceivable	6328000000	USD
CY2019	arnc	Proceeds From Receivable Funding Since Inception ProceedsFromReceivableFundingSinceInception	600000000	USD
CY2019	arnc	Repayments For Receivable Funding Since Inception RepaymentsForReceivableFundingSinceInception	600000000	USD
CY2018	arnc	Funding Of Customer Receivables Sold FundingOfCustomerReceivablesSold	0	USD
CY2018	arnc	Proceeds From Receivable Funding Since Inception ProceedsFromReceivableFundingSinceInception	600000000	USD
CY2018	arnc	Repayments For Receivable Funding Since Inception RepaymentsForReceivableFundingSinceInception	600000000	USD
CY2019	arnc	Deferred Price Customer Receivables DeferredPriceCustomerReceivables	246000000	USD
CY2018	arnc	Deferred Price Customer Receivables DeferredPriceCustomerReceivables	234000000	USD
CY2019	arnc	Gross Amountof Receivables Sold Since Inception GrossAmountofReceivablesSoldSinceInception	48383000000	USD
CY2019	us-gaap	Proceeds From Collection Of Other Receivables ProceedsFromCollectionOfOtherReceivables	47787000000	USD
CY2019Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	671000000	USD
CY2018Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	668000000	USD
CY2019Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	1316000000	USD
CY2018Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	1371000000	USD
CY2019Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	343000000	USD
CY2018Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	366000000	USD
CY2019Q4	us-gaap	Inventory Supplies Net Of Reserves InventorySuppliesNetOfReserves	99000000	USD
CY2018Q4	us-gaap	Inventory Supplies Net Of Reserves InventorySuppliesNetOfReserves	87000000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	2429000000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	2492000000	USD
CY2019Q4	us-gaap	Lifo Inventory Amount LIFOInventoryAmount	1257000000	USD
CY2018Q4	us-gaap	Lifo Inventory Amount LIFOInventoryAmount	1292000000	USD
CY2019Q4	us-gaap	Inventory Lifo Reserve InventoryLIFOReserve	445000000	USD
CY2018Q4	us-gaap	Inventory Lifo Reserve InventoryLIFOReserve	530000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	11806000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	11734000000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	7074000000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	6769000000	USD
CY2019Q4	arnc	Properties Plants And Equipment Excluding Construction Work In Progress PropertiesPlantsAndEquipmentExcludingConstructionWorkInProgress	4732000000	USD
CY2018Q4	arnc	Properties Plants And Equipment Excluding Construction Work In Progress PropertiesPlantsAndEquipmentExcludingConstructionWorkInProgress	4965000000	USD
CY2019Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	731000000	USD
CY2018Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	739000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	5463000000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	5704000000	USD
CY2017Q4	us-gaap	Goodwill Gross GoodwillGross	5282000000	USD
CY2017Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	747000000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	4535000000	USD
CY2018	arnc	Goodwill Acquisition And Divestitures GoodwillAcquisitionAndDivestitures	1000000	USD
CY2018	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-34000000	USD
CY2018Q4	us-gaap	Goodwill Gross GoodwillGross	5247000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	71000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	194000000	USD
CY2018Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	747000000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	4500000000	USD
CY2019	arnc	Goodwill Acquisition And Divestitures GoodwillAcquisitionAndDivestitures	13000000	USD
CY2019	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	6000000	USD
CY2019	us-gaap	Goodwill Transfers GoodwillTransfers	0	USD
CY2019Q4	us-gaap	Goodwill Gross GoodwillGross	5240000000	USD
CY2019Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	747000000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	4493000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	1553000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	927000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	626000000	USD
CY2019Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	32000000	USD
CY2019Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	32000000	USD
CY2019Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	1585000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	927000000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	658000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	1800000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	913000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	887000000	USD
CY2018Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	32000000	USD
CY2018Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	32000000	USD
CY2018Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	1832000000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	913000000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	919000000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	70000000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	81000000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	71000000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	145000000	USD
CY2018	us-gaap	Operating Lease Cost OperatingLeaseCost	144000000	USD
CY2017	us-gaap	Operating Lease Cost OperatingLeaseCost	113000000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	252000000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	265000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	94000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	81000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	74000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	62000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	54000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	46000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	40000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	34000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	30000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	24000000	USD
CY2018Q4	arnc	Operating Leases Future Minimum Payments Due In Six Years OperatingLeasesFutureMinimumPaymentsDueInSixYears	0	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	70000000	USD
CY2018Q4	arnc	Operating Leases Future Minimum Payments Due After Year Six OperatingLeasesFutureMinimumPaymentsDueAfterYearSix	87000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	317000000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	379000000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	52000000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	265000000	USD
CY2019	arnc	Lease Obligations Incurred Operating Lease LeaseObligationsIncurredOperatingLease	41000000	USD
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.060
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	5909000000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	4906000000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	5896000000	USD
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	6301000000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	1003000000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	405000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	1000000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	1250000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	627000000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	0	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	1250000000	USD
CY2018	us-gaap	Interest Expense Debt InterestExpenseDebt	19000000	USD
CY2017Q2	us-gaap	Repayments Of Debt RepaymentsOfDebt	409000000	USD
CY2017Q2	us-gaap	Sale Of Stock Number Of Shares Issued In Transaction SaleOfStockNumberOfSharesIssuedInTransaction	12958767	shares
CY2017Q2	us-gaap	Sale Of Stock Price Per Share SaleOfStockPricePerShare	35.91
CY2017Q2	us-gaap	Debt Instrument Repurchase Amount DebtInstrumentRepurchaseAmount	874000000	USD
CY2017Q2	us-gaap	Interest Expense Debt InterestExpenseDebt	58000000	USD
CY2017Q2	us-gaap	Interest Paid InterestPaid	27000000	USD
CY2017Q2	us-gaap	Legal Fees LegalFees	2000000	USD
CY2017Q2	us-gaap	Cost Method Investments Realized Gain Loss CostMethodInvestmentsRealizedGainLoss	167000000	USD
CY2017Q2	us-gaap	Interest Expense InterestExpense	24000000	USD
CY2019Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	640000000	USD
CY2019Q4	arnc	Short Term Debt Excluding Current Maturities Of Longterm Debt ShortTermDebtExcludingCurrentMaturitiesOfLongtermDebt	31000000	USD
CY2018Q4	arnc	Short Term Debt Excluding Current Maturities Of Longterm Debt ShortTermDebtExcludingCurrentMaturitiesOfLongtermDebt	29000000	USD
CY2019Q4	arnc	Accounts Payable Settlement Arrangements AccountsPayableSettlementArrangements	29000000	USD
CY2018Q4	arnc	Accounts Payable Settlement Arrangements AccountsPayableSettlementArrangements	29000000	USD
CY2018Q4	arnc	Average Outstanding Commercial Paper AverageOutstandingCommercialPaper	49000000	USD
CY2018Q4	us-gaap	Debt Weighted Average Interest Rate DebtWeightedAverageInterestRate	0.025
CY2019Q4	us-gaap	Restricted Cash RestrictedCash	55000000	USD
CY2018Q4	us-gaap	Restricted Cash RestrictedCash	6000000	USD
CY2017Q4	us-gaap	Restricted Cash RestrictedCash	4000000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	340000000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	391000000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	508000000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	122000000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	74000000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	118000000	USD
CY2017Q4	us-gaap	Sale Of Stock Number Of Shares Issued In Transaction SaleOfStockNumberOfSharesIssuedInTransaction	24022	shares
CY2017Q4	us-gaap	Conversion Of Stock Shares Converted1 ConversionOfStockSharesConverted1	31420	shares
CY2019	arnc	Number Of Cleanup Locations NumberOfCleanupLocations	100	location
CY2019Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	230000000	USD
CY2018Q4	us-gaap	Accrual For Environmental Loss Contingencies AccrualForEnvironmentalLossContingencies	266000000	USD
CY2019Q4	us-gaap	Accrued Environmental Loss Contingencies Current AccruedEnvironmentalLossContingenciesCurrent	94000000	USD
CY2018Q4	us-gaap	Accrued Environmental Loss Contingencies Current AccruedEnvironmentalLossContingenciesCurrent	81000000	USD
CY2019	us-gaap	Accrual For Environmental Loss Contingencies Payments1 AccrualForEnvironmentalLossContingenciesPayments1	65000000	USD
CY2018	us-gaap	Accrual For Environmental Loss Contingencies Payments1 AccrualForEnvironmentalLossContingenciesPayments1	32000000	USD
CY2019Q4	arnc	Income Tax Examination Assessment Outstanding IncomeTaxExaminationAssessmentOutstanding	172000000	USD
CY2019Q4	arnc	Income Tax Examination Assessment Outstanding IncomeTaxExaminationAssessmentOutstanding	154000000	EUR
CY2019	us-gaap	Increase Decrease In Reserve For Commissions Expense And Taxes IncreaseDecreaseInReserveForCommissionsExpenseAndTaxes	59000000	USD
CY2019Q2	us-gaap	Loss Contingency Number Of Plaintiffs LossContingencyNumberOfPlaintiffs	247	plaintiff
CY2019Q4	us-gaap	Recorded Unconditional Purchase Obligation Due Within One Year RecordedUnconditionalPurchaseObligationDueWithinOneYear	604000000	USD
CY2019Q4	us-gaap	Recorded Unconditional Purchase Obligation Due In Second Year RecordedUnconditionalPurchaseObligationDueInSecondYear	93000000	USD
CY2019Q4	us-gaap	Recorded Unconditional Purchase Obligation Due In Third Year RecordedUnconditionalPurchaseObligationDueInThirdYear	45000000	USD
CY2019Q4	us-gaap	Recorded Unconditional Purchase Obligation Due In Fourth Year RecordedUnconditionalPurchaseObligationDueInFourthYear	12000000	USD
CY2019Q4	us-gaap	Recorded Unconditional Purchase Obligation Due In Fifth Year RecordedUnconditionalPurchaseObligationDueInFifthYear	4000000	USD
CY2019Q4	us-gaap	Recorded Unconditional Purchase Obligation Due After Fifth Year RecordedUnconditionalPurchaseObligationDueAfterFifthYear	2000000	USD
CY2019Q4	us-gaap	Guarantee Obligations Current Carrying Value GuaranteeObligationsCurrentCarryingValue	31000000	USD
CY2019Q4	arnc	Number Of Long Term Energy Supply Agreements NumberOfLongTermEnergySupplyAgreements	2	agreement
CY2017Q4	arnc	Numberof Agreements Terminated NumberofAgreementsTerminated	1	agreement
CY2018Q3	arnc	Number Of Long Term Energy Supply Agreements NumberOfLongTermEnergySupplyAgreements	2	agreement
CY2019Q4	arnc	Insurance Annual Coverage Limit InsuranceAnnualCoverageLimit	80000000	USD
CY2019Q4	arnc	Amount Committed Under Outstanding Surety Bonds AmountCommittedUnderOutstandingSuretyBonds	50000000	USD
CY2019Q4	arnc	Separation And Distribution Agreement Surety Bonds Amount Outstanding SeparationAndDistributionAgreementSuretyBondsAmountOutstanding	24000000	USD
CY2019Q1	arnc	Separation Transaction Number Of Independent Publicly Traded Companies Formed SeparationTransactionNumberOfIndependentPubliclyTradedCompaniesFormed	2	company
CY2019Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3541000000	USD
CY2019Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3691000000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3559000000	USD
CY2019Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3401000000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	14192000000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	187000000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	-121000000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	95000000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	309000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	470000000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.40
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.27
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.22
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.71
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.05
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.39
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.27
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.21
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.70
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.03
CY2018Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3445000000	USD
CY2018Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3573000000	USD
CY2018Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3524000000	USD
CY2018Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3472000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	14014000000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	143000000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	120000000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	161000000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	218000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	642000000	USD
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.30
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.25
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.33
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.45
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.33
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.29
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.24
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.32
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.44
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.30
CY2019Q4	arnc	Separation Transaction Costs Net Of Tax SeparationTransactionCostsNetOfTax	28000000	USD
CY2019Q4	arnc	Separation Transaction Costs Before Tax SeparationTransactionCostsBeforeTax	34000000	USD
CY2018Q4	arnc	Payment For Pension Settlement Charges Net Of Tax PaymentForPensionSettlementChargesNetOfTax	72000000	USD
CY2018Q4	us-gaap	Pension Contributions PensionContributions	92000000	USD

Files In Submission

Name	View Source	Status
0000004281-20-000038-index-headers.html	Edgar Link	pending
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0000004281-20-000038.txt	Edgar Link	pending
0000004281-20-000038-xbrl.zip	Edgar Link	pending
arnc-20191231.xsd	Edgar Link	pending
arnc-20191231_cal.xml	Edgar Link	unprocessable
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$HWM
Howmet Aerospace Inc. Stock $hwm

2019 Q4 Form 10-K Financial Statement

#000000428120000038 Filed on February 27, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$HWM Howmet Aerospace Inc. Stock $hwm

2019 Q4 Form 10-K Financial Statement

#000000428120000038 Filed on February 27, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$HWM
Howmet Aerospace Inc. Stock $hwm