XML 119 R102.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Receivables - Additional Information (Details) $ in Millions |  | 12 Months Ended
--- | --- | ---
Mar. 30, 2012 USD ($) | Dec. 31, 2018 USD ($) financial_institution | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Schedule Of Financial Receivables [Line Items] |  |  |  |
Number of arrangement with different financial institution to sell customer receivables | financial_institution |  | 3 |  |
Funding of customer receivables sold |  | $ 0 | $ 0 |
Sale of customer receivables | $ 304 |  |  |
Cash received for receivables | 50 | 1,016 | 792 | $ 778
Deferred purchase price receivable | $ 254 | 234 | 187 |
Net cash funding received during the period |  | 300 |  |
Amount of cash draws under arrangement during the period |  | 2,958 |  |
Amount of cash repayments under arrangement during the period |  | (2,658) |  |
Amount of cash draws under arrangement since inception |  | 600 | 600 |
Amount of cash repayments under arrangement since inception |  | (600) | (600) |
Gross amount of receivables sold under the deferred purchase program |  | 41,784 |  |
Cash collections of other receivables |  | 41,200 |  |
Gross cash outflows from deferred purchased receivables |  | 6,375 | 5,471 |
Gross cash inflow from deferred purchase receivable |  | (6,328) | $ (5,367) |
Maximum |  |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |  |
Funding of customer receivables sold |  | $ 400 |  |

X
- Definition Cash Inflow (Outflow) From Deferred Purchase Receivable + References No definition available. + Details
Name: | arnc_CashInflowOutflowFromDeferredPurchaseReceivable
Namespace Prefix: | arnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Cash Outflow (Inflow) From Deferred Purchase Receivable + References No definition available. + Details
Name: | arnc_CashOutflowInflowFromDeferredPurchaseReceivable
Namespace Prefix: | arnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Deferred purchase price customer receivables. + References No definition available. + Details
Name: | arnc_DeferredPriceCustomerReceivables
Namespace Prefix: | arnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Funding of customer receivables sold. + References No definition available. + Details
Name: | arnc_FundingOfCustomerReceivablesSold
Namespace Prefix: | arnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Gross Amount of Receivables Sold Since Inception + References No definition available. + Details
Name: | arnc_GrossAmountofReceivablesSoldSinceInception
Namespace Prefix: | arnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Net cash funding received for development of reserves during the period. + References No definition available. + Details
Name: | arnc_NetCashFundingReceivedForDevelopmentOfReservesDuringThePeriod
Namespace Prefix: | arnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of arrangements to sell customer receivables. + References No definition available. + Details
Name: | arnc_NumberOfArrangementsToSellCustomerReceivables
Namespace Prefix: | arnc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Proceeds from receivable funding during the period. + References No definition available. + Details
Name: | arnc_ProceedsFromReceivableFundingDuringThePeriod
Namespace Prefix: | arnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Proceeds from receivable funding since inception. + References No definition available. + Details
Name: | arnc_ProceedsFromReceivableFundingSinceInception
Namespace Prefix: | arnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Repayments for receivable funding during the period. + References No definition available. + Details
Name: | arnc_RepaymentsForReceivableFundingDuringThePeriod
Namespace Prefix: | arnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Repayments for receivable funding since inception. + References No definition available. + Details
Name: | arnc_RepaymentsForReceivableFundingSinceInception
Namespace Prefix: | arnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Sale of customer receivables + References No definition available. + Details
Name: | arnc_SaleOfCustomerReceivables
Namespace Prefix: | arnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Schedule Of Financial Receivables [Line Items] + References No definition available. + Details
Name: | arnc_ScheduleOfFinancialReceivablesLineItems
Namespace Prefix: | arnc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cash inflow from the collection of receivables classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromCollectionOfOtherReceivables
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow associated with the sale of receivables arising from the financing of goods and services. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromSaleOfFinanceReceivables
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |