XML 149 R9999.htm IDEA: XBRL DOCUMENT
v3.20.4

Label | Element | Value
--- | --- | ---
Goodwill, Impaired, Accumulated Impairment Loss | us-gaap_GoodwillImpairedAccumulatedImpairmentLoss | $ 721,000,000
Fastening Systems [Member] |  |
Goodwill, Impaired, Accumulated Impairment Loss | us-gaap_GoodwillImpairedAccumulatedImpairmentLoss | 0
Forged Wheels [Member] |  |
Goodwill, Impaired, Accumulated Impairment Loss | us-gaap_GoodwillImpairedAccumulatedImpairmentLoss | 0
Engine Products [Member] |  |
Goodwill, Impaired, Accumulated Impairment Loss | us-gaap_GoodwillImpairedAccumulatedImpairmentLoss | 719,000,000
Engineered Structures [Member] |  |
Goodwill, Impaired, Accumulated Impairment Loss | us-gaap_GoodwillImpairedAccumulatedImpairmentLoss | $ 2,000,000

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- Definition Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=arnc_FasteningSystemsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=arnc_ForgedWheelsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=arnc_EngineProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=arnc_EngineeredStructuresMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |