XML 53 R45.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Segment Information - Disaggregation of Revenue by Major End Market Served (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Revenue, Major Customer [Line Items] |  |  |  |
Sales | $ 1,433 | $ 1,283 | $ 4,150 | $ 3,687
Third-party sales |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 1,433 | 1,283 | 4,150 | 3,687
Third-party sales | Engine Products |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 683 | 599 | 1,966 | 1,677
Third-party sales | Fastening Systems |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 291 | 254 | 832 | 788
Third-party sales | Engineered Structures |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 193 | 199 | 560 | 535
Third-party sales | Forged Wheels |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 266 | 231 | 792 | 687
Third-party sales | Aerospace - Commercial |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 668 | 543 | 1,879 | 1,466
Third-party sales | Aerospace - Commercial | Engine Products |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 388 | 299 | 1,079 | 786
Third-party sales | Aerospace - Commercial | Fastening Systems |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 156 | 126 | 459 | 403
Third-party sales | Aerospace - Commercial | Engineered Structures |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 124 | 118 | 341 | 277
Third-party sales | Aerospace - Commercial | Forged Wheels |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 0 | 0 | 0 | 0
Third-party sales | Aerospace - Defense |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 223 | 232 | 672 | 728
Third-party sales | Aerospace - Defense | Engine Products |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 124 | 130 | 384 | 402
Third-party sales | Aerospace - Defense | Fastening Systems |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 43 | 37 | 112 | 120
Third-party sales | Aerospace - Defense | Engineered Structures |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 56 | 65 | 176 | 206
Third-party sales | Aerospace - Defense | Forged Wheels |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 0 | 0 | 0 | 0
Third-party sales | Commercial Transportation |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 329 | 290 | 961 | 841
Third-party sales | Commercial Transportation | Engine Products |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 0 | 0 | 0 | 0
Third-party sales | Commercial Transportation | Fastening Systems |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 63 | 59 | 169 | 154
Third-party sales | Commercial Transportation | Engineered Structures |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 0 | 0 | 0 | 0
Third-party sales | Commercial Transportation | Forged Wheels |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 266 | 231 | 792 | 687
Third-party sales | Industrial and Other |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 213 | 218 | 638 | 652
Third-party sales | Industrial and Other | Engine Products |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 171 | 170 | 503 | 489
Third-party sales | Industrial and Other | Fastening Systems |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 29 | 32 | 92 | 111
Third-party sales | Industrial and Other | Engineered Structures |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | 13 | 16 | 43 | 52
Third-party sales | Industrial and Other | Forged Wheels |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Sales | $ 0 | $ 0 | $ 0 | $ 0

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_EntityWideRevenueMajorCustomerLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9031-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130543-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI https://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_ConsolidationItemsAxis=hwm_OperatingSegmentsAndCorporateNonSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

X
- Details
Name: | srt_ProductOrServiceAxis=hwm_AerospaceCommercialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=hwm_AerospaceDefenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=hwm_CommercialTransportationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=hwm_IndustrialAndOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |