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Segment Information - Schedule of Operating Results of Arconic's Reportable Segments (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Segment Reporting Information [Line Items] |  |
Total sales | $ 3,192 | $ 3,055
Depreciation and amortization | 126 | 126
Adjusted EBITDA | 549 | 524
Operating Segments [Member] |  |
Segment Reporting Information [Line Items] |  |
Total sales | 3,217 | 3,091
Intersegment Eliminations [Member] |  |
Segment Reporting Information [Line Items] |  |
Intersegment sales | 34 | 29
Third-Party Sales [Member] | Operating Segments [Member] |  |
Segment Reporting Information [Line Items] |  |
Third-party sales | 3,183 | 3,062
Engineered Products and Solutions [Member] |  |
Segment Reporting Information [Line Items] |  |
Depreciation and amortization | 64 | 65
Adjusted EBITDA | 306 | 305
Engineered Products and Solutions [Member] | Operating Segments [Member] |  |
Segment Reporting Information [Line Items] |  |
Total sales | 1,485 | 1,449
Engineered Products and Solutions [Member] | Third-Party Sales [Member] | Operating Segments [Member] |  |
Segment Reporting Information [Line Items] |  |
Third-party sales | 1,485 | 1,449
Global Rolled Products [Member] |  |
Segment Reporting Information [Line Items] |  |
Depreciation and amortization | 50 | 50
Adjusted EBITDA | 171 | 155
Global Rolled Products [Member] | Operating Segments [Member] |  |
Segment Reporting Information [Line Items] |  |
Total sales | 1,283 | 1,213
Global Rolled Products [Member] | Intersegment Eliminations [Member] |  |
Segment Reporting Information [Line Items] |  |
Intersegment sales | 34 | 29
Global Rolled Products [Member] | Third-Party Sales [Member] | Operating Segments [Member] |  |
Segment Reporting Information [Line Items] |  |
Third-party sales | 1,249 | 1,184
Transportation and Construction Solutions [Member] |  |
Segment Reporting Information [Line Items] |  |
Depreciation and amortization | 12 | 11
Adjusted EBITDA | 72 | 64
Transportation and Construction Solutions [Member] | Operating Segments [Member] |  |
Segment Reporting Information [Line Items] |  |
Total sales | 449 | 429
Transportation and Construction Solutions [Member] | Third-Party Sales [Member] | Operating Segments [Member] |  |
Segment Reporting Information [Line Items] |  |
Third-party sales | $ 449 | $ 429

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