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Segment and Geographic Area Information - Schedule of Operating Results of Arconic's Reportable Segment (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Segment Reporting Information [Line Items] |  |  |
Sales | $ 6,640 | $ 5,663 | $ 4,972
Restructuring and other (credits) charges | 23 | 56 | 90
Provision for depreciation and amortization | 272 | 265 | 270
Capital expenditures | 219 | 193 | 199
Total assets | 10,428 | 10,255 |
Third-party sales |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 6,640 | 5,663 | 4,972
Inter-segment sales |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 16 | 10 | 10
Total segment sales |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 6,656 | 5,673 | 4,982
Segment Adjusted EBITDA | 1,587 | 1,352 | 1,200
Restructuring and other (credits) charges | 20 | 46 | 90
Provision for depreciation and amortization | 262 | 258 | 261
Capital expenditures | 205 | 178 | 182
Total assets | 9,814 | 9,419 | 9,262
Engine Products | Third-party sales |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 3,266 | 2,698 | 2,282
Engine Products | Inter-segment sales |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 13 | 4 | 4
Engine Products | Total segment sales |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 3,279 | 2,702 | 2,286
Segment Adjusted EBITDA | 887 | 729 | 564
Restructuring and other (credits) charges | (2) | 29 | 74
Provision for depreciation and amortization | 130 | 125 | 124
Capital expenditures | 112 | 94 | 74
Total assets | 4,926 | 4,784 | 4,663
Fastening Systems | Third-party sales |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 1,349 | 1,117 | 1,044
Fastening Systems | Inter-segment sales |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 0 | 0 | 0
Fastening Systems | Total segment sales |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 1,349 | 1,117 | 1,044
Segment Adjusted EBITDA | 278 | 234 | 239
Restructuring and other (credits) charges | 1 | 8 | 0
Provision for depreciation and amortization | 46 | 45 | 49
Capital expenditures | 31 | 39 | 42
Total assets | 2,749 | 2,661 | 2,635
Engineered Structures | Third-party sales |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 878 | 790 | 725
Engineered Structures | Inter-segment sales |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 3 | 6 | 6
Engineered Structures | Total segment sales |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 881 | 796 | 731
Segment Adjusted EBITDA | 113 | 111 | 103
Restructuring and other (credits) charges | 21 | 7 | 16
Provision for depreciation and amortization | 47 | 48 | 49
Capital expenditures | 26 | 17 | 21
Total assets | 1,415 | 1,273 | 1,280
Forged Wheels | Third-party sales |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 1,147 | 1,058 | 921
Forged Wheels | Inter-segment sales |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 0 | 0 | 0
Forged Wheels | Total segment sales |  |  |
Segment Reporting Information [Line Items] |  |  |
Sales | 1,147 | 1,058 | 921
Segment Adjusted EBITDA | 309 | 278 | 294
Restructuring and other (credits) charges | 0 | 2 | 0
Provision for depreciation and amortization | 39 | 40 | 39
Capital expenditures | 36 | 28 | 45
Total assets | $ 724 | $ 701 | $ 684

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